Example: Identifying running objects
In the WebSphere Application Server, MBeans represent running objects. You can interrogate the MBean server to see the objects it contains. Use the AdminControl object to interact with running MBeans.
* Use the queryNames command to see running MBean objects. For example:
$AdminControl queryNames *
This command returns a list of all MBean types. Depending on the server to which your scripting client attaches, this list can contain MBeans that run on different servers:
* If the client attaches to a stand-alone WebSphere Application Server, the list contains MBeans that run on that server.
* If the client attaches to a node agent, the list contains MBeans that run in the node agent and MBeans that run on all application servers on that node.
* If the client attaches to a deployment manager, the list contains MBeans that run in the deployment manager, all of the node agents communicating with that deployment manager, and all application servers on the nodes served by those node agents.
· The list that the queryNames command returns is a string representation of JMX ObjectName objects. For example:
WebSphere:cell=MyCell,name=TraceService,mbeanIdentifier=TraceService,
type=TraceService,node=MyNode,process=server1
This example represents a TraceServer object that runs in server1 on MyNode.
* The single queryNames argument represents the ObjectName object for which you are searching. The asterisk ("*") in the example means return all objects, but it is possible to be more specific. As shown in the example, ObjectName has two parts: a domain, and a list of key properties. For MBeans created by the WebSphere Application Server, the domain is WebSphere. If you do not specify a domain when you invoke queryNames, the scripting client assumes the domain is WebSphere. This means that the first example query above is equivalent to:
$AdminControl queryNames WebSphere:*
* WebSphere Application Server includes the following key properties for the ObjectName object:
* name
* type
* cell
* node
* process mbeanIdentifier
These key properties are common. There are other key properties that exist. You can use any of these key properties to narrow the scope of the queryNames command. For example:
$AdminControl queryNames WebSphere:type=Server,node=myNode,*
This example returns a list of all MBeans that represent server objects running the node myNode. The, * at the end of the ObjectName object is a JMX wildcard designation. For example, if you enter the following:
$AdminControl queryNames WebSphere:type=Server,node=myNode
you get an empty list back because the argument to queryNames is not a wildcard. There is no Server MBean running that has exactly these key properties and no others.
* If you want to see all the MBeans representing applications running on a particular node, invoke the following example:
$AdminControl queryNames WebSphere:type=Application,node=myNode,*
Example: Turning traces on and off in a server process with the wsadmin tool
The following example turns on tracing in a server process:
* Identify the object name for the TraceService MBean running in the process:
$AdminControl completeObjectName type=Server,name=server1,*
* Obtain the name of the object and set it to a variable:
set ts [$AdminControl completeObjectName type=TraceService,process=server1,*]
* Turn on traces for the server:
$AdminControl setAttribute $ts traceSpecification com.ibm.*=all=enabled
Example: Dumping threads in a server process
Use the AdminControl object to dump the Java threads of a running server.
* For example, in Jacl:
set jvm [$AdminControl completeObjectName type=JVM,process=server1,*]
$AdminControl invoke $jvm dumpThreads
This example produces a Java core file. You can use this file for problem determination.
Example: Starting a server using wsadmin
The following example starts an application server with the node specified.
* The following command starts server1 in mynode node:
$AdminControl startServer server1 mynode
Example output:
WASX7319I: The serverStartupSyncEnabled attribute is set to false. A startwill be attempted for server "server1" but the configuration information fornode "mynode" may not be current.WASX7262I: Start completed for server "server1" on node "mynode"
* The startServer command has several command syntax options. If you have Network Deployment installation, you have to use one of following:
$AdminControl startServer serverName nodeName
$AdminControl startServer serverName nodeName waitTime
* If you have an application server base installation, you can use the following syntax in addition to the previous syntax:
$AdminControl startServer serverName
$AdminControl startServer serverName waitTime
Example: Stopping a server using wsadmin
The following example stops an application server with the node specified.
* The following command stops server1 in node mynode.
$AdminControl stopServer server1 mynode
Example output:
WASX7337I: Invoked stop for server "server1" Waiting for stop completion.
WASX7264I: Stop completed for server "server1" on node "mynode"
* The stop command has serveral command syntaxes.
If you have Network Deployment installation, use the one of following command syntax:
$AdminControl stopServer serverName nodeName
$AdminControl stopServer serverName nodeName immediate
If you have application server base installation, you can use the following syntax, in addition to the previous syntax:
$AdminControl stopServer serverName
$AdminControl stopServer serverName immediate
Example: Querying the server state using the wsadmin tool
The following example queries the server state.
* Identify the server and assign it to the server variable.
set server [$AdminControl completeObjectName cell=mycell,node=mynode,name=server1,type=Server,*]
This command returns the server MBean that matches the partial object name string.
Example output:
WebSphere:cell=mycell,name=server1,mbeanIdentifier=server.xml#Server_1,
type=Server,node=mynode,process=server1,processType=ManagedProcess
* Query for the state attribute.
$AdminControl getAttribute $server state
The getAttribute command returns the value of a single attribute.
Example output:
STARTED
Example: Starting a listener port using wsadmin
The following example starts a listener port on an application server.
* Identify the listener port MBeans for the application server and assign it to the lPorts variable.
set lPorts [$AdminControl queryNames type=ListenerPort,cell=mycell,node=mynode,process=server1,*]
This command returns a list of listener port MBeans.
Example output: WebSphere:cell=mycell,name=ListenerPort,mbeanIdentifier=server.xml#ListenerPort_1,
type=ListenerPort,node=mynode,process=server1
WebSphere:cell=mycell,name=listenerPort,mbeanIdentifier=ListenerPort,type=server.xml#ListenerPort_2,
node=mynode,process=server1
* Start the listener port if it is not started with the following example:·
foreach lPort $lPorts
{ set state [$AdminControl getAttribute $lport started]
if {$state == "false"} {
$AdminControl invoke $lPort start
}
}
This piece of Jacl code loops through the listener port MBeans. For each listener port MBean, get the attribute value for the started attribute. If the attribute value is set to false, then start the listener port by invoking the start operation on the MBean.
Example: Testing data source connection using wsadmin
The following example tests a dataSource, to ensure a connection to the database.
* Identify the DataSourceCfgHelper MBean and assign it to the dshelper variable.
set dshelper [$AdminControl queryNames type=DataSourceCfgHelper,process=server1*]
Example output:
WebSphere:cell=mycell,name=DataSourceCfgHelper,mbeanIdentifier=DataSourceCfgHelper,
type=DataSourceCfgHelper,node=mynode,process=server1
* Test the connection.
$AdminControl invoke $dshelper testConnectionToDataSource "COM.ibm.db2.jdbc.DB2XADataSource dbuser1 dbpwd1 {{databaseName jtest1}} c:/sqllib/java12/db \"\" \"\""
This example command invokes the testConnectionToDataSource operation on the MBean, passing in the classname, userid, password, database name, JDBC driver class path, language, and country.
Example output:
DSRA8025I: Successfully connected to DataSource
Example: Starting an application using wsadmin
The following example starts an application:
* Identify the application manager MBean for the server where the application resides and assign it the appManager variable.
set appManager [$AdminControl queryNames cell=mycell,node=mynode,type=ApplicationManager,process=server1,*]
This command returns the application manager MBean.
Example output:
WebSphere:cell=mycell,name=ApplicationManager,mbeanIdentifier=ApplicationManager,
type=ApplicationManager,node=mynode,process=server1
* Start the application.
$AdminControl invoke $appManager startApplication myApplication
This command invokes the startApplication operation on the MBean, passing in the application name to start.
Example: Stopping running applications on a server using wsadmin
The following example stops all running applications on a server:
* Identify the application manager MBean for the server where the application resides, and assign it to the appManager variable.
set appManager [$AdminControl queryNames cell=mycell,node=mynode,type=ApplicationManager,process=server1,*]
This command returns the application manager MBean.
Example output: WebSphere:cell=mycell,name=ApplicationManager,mbeanIdentifier=ApplicationManager,
type=ApplicationManager,node=mynode,process=server1
* Query the running applications belonging to this server and assign the result to the apps variable.
set apps [$AdminControl queryNames cell=mycell,node=mynode,type=Application,process=server1,*]
This command returns a list of application MBeans.
Example output:
WebSphere:cell=mycell,name=adminconsole,mbeanIdentifier=deployment.xml#ApplicationDeployment_1,
type=Application,node=mynode,Server=server1,process=server1,J2EEName=adminconsole
WebSphere:cell=mycell,name=filetransfer,mbeanIdentifier=deployment.xml#ApplicationDeployment_1,
type=Application,node=mynode,Server=server1,process=server1,J2EEName=filetransfer
* Stop all the running applications.
foreach app $apps
{
set appName [$AdminControl getAttribute $app name]
$AdminControl invoke $appManager stopApplication $appName
}
This command stops all the running applications by invoking the stopApplication operation on the MBean, passing in the application name to stop.
Example: Querying application state using wsadmin
The following examples queries for the presence of Application MBean to find out whether the application is running.
$AdminControl completeObjectName type=Application,name=myApplication,*
If myApplication is running, then there should be an MBean created for it. Otherwise, the command returns nothing. If myApplication is running,
the following is the example output:
WebSphere:cell=mycell,name=myApplication,mbeanIdentifier=cells/mycell/applications/myApplication.ear/deployments/myApplication/deployment.xml#ApplicationDeployment_1,
type=Application,node=mynode,Server=dmgr,process=dmgr,J2EEName=myApplication
Example: Updating the Web server plug-in configuration files using wsadmin
This examples regenerates the web serer plugin configuration file.
* Identify the web server plugin configuraiton file generator MBean and assign it to the pluginGen variable.
EX:
set pluginGen [$AdminControl completeObjectName type=PluginCfgGenerator,*]
Example output:
WebSphere:cell=pongoNetwork,name=PluginCfgGenerator,
mbeanIdentifier=PluginCfgGenerator,type=PluginCfgGenerator,node=pongoManager,
process=dmgr
* Generate the updated plugin configuration file.
EX:
$AdminControl invoke $pluginGen generate "c:/WebSphere/DeploymentManager c:/WebSphere/DeploymentManager/config mycell null null plugin-cfg.xml"
This example command assumes a Windows system install. It invokes the generate operation on the MBean, passing in the install root directory, configuration root directory, cell name, node name, server name, and output file name. To pass in null as the value of an argument, enter null as given in the example. This is provided for operation that allows null as the value of its argument and processes null differently from an empty string. In this example, both node and server are set to null. The generate operation generates plugin configuration for all the nodes and servers resided in the cell. The output file plugin-cfg.xml is created in the config root directory.
You can modify this example command to generate plugin configuration for a particular node or server by specifying the node and server names.
Friday, November 26, 2010
Friday, November 19, 2010
AIX commands you should not leave home without
Commands
Kernel
How would I know if I am running a 32-bit kernel or 64-bit kernel?
To display if the kernel is 32-bit enabled or 64-bit enabled, type:
bootinfo -K
How do I know if I am running a uniprocessor kernel or a multiprocessor kernel?
/unix is a symbolic link to the booted kernel. To find out what kernel mode is running, enter ls -l /unix and see what file /unix it links to. The following are the three possible outputs from the ls -l /unix command and their corresponding kernels:
/unix -> /usr/lib/boot/unix_up # 32 bit uniprocessor kernel
/unix -> /usr/lib/boot/unix_mp # 32 bit multiprocessor kernel
/unix -> /usr/lib/boot/unix_64 # 64 bit multiprocessor kernel
Note:
AIX 5L Version 5.3 does not support a uniprocessor kernel.
How can I change from one kernel mode to another?
During the installation process, one of the kernels, appropriate for the AIX version and the hardware in operation, is enabled by default. Let us use the method from the previous question and assume the 32-bit kernel is enabled. Let us also assume that you want to boot it up in the 64-bit kernel mode. This can be done by executing the following commands in sequence:
ln -sf /usr/lib/boot/unix_64 /unix
ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix
bosboot -ad /dev/hdiskxx
shutdown -r
The /dev/hdiskxx directory is where the boot logical volume /dev/hd5 is located. To find out what xx is in hdiskxx, run the following command:
lslv -m hd5
Note:
In AIX 5.2, the 32-bit kernel is installed by default. In AIX 5.3, the 64-bit kernel is installed on 64-bit hardware and the 32-bit kernel is installed on 32-bit hardware by default.
Hardware
How would I know if my machine is capable of running AIX 5L Version 5.3?
AIX 5L Version 5.3 runs on all currently supported CHRP (Common Hardware Reference Platform)-based POWER hardware.
How would I know if my machine is CHRP-based?
Run the prtconf command. If it's a CHRP machine, the string chrp appears on the Model Architecture line.
How would I know if my System p machine (hardware) is 32-bit or 64-bit?
To display if the hardware is 32-bit or 64-bit, type:
bootinfo -y
How much real memory does my machine have?
To display real memory in kilobytes (KB), type one of the following:
bootinfo -r
lsattr -El sys0 -a realmem
Can my machine run the 64-bit kernel?
64-bit hardware is required to run the 64-bit kernel.
What are the values of attributes for devices in my system?
To list the current values of the attributes for the tape device, rmt0, type:
lsattr -l rmt0 -E
To list the default values of the attributes for the tape device, rmt0, type:
lsattr -l rmt0 -D
To list the possible values of the login attribute for the TTY device, tty0, type:
lsattr -l tty0 -a login -R
To display system level attributes, type:
lsattr -E -l sys0
How many processors does my system have?
To display the number of processors on your system, type:
lscfg | grep proc
How many hard disks does my system have and which ones are in use?
To display the number of hard disks on your system, type:
lspv
How do I list information about a specific physical volume?
To find details about hdisk1, for example, run the following command:
lspv hdisk1
How do I get a detailed configuration of my system?
Type the following:
lscfg
The following options provide specific information:
-p Displays platform-specific device information. The flag is applicable to AIX 4.2.1 or later.
-v Displays the VPD (Vital Product Database) found in the customized VPD object class.
For example, to display details about the tape drive, rmt0, type:
lscfg -vl rmt0
You can obtain very similar information by running the prtconf command.
How do I find out the chip type, system name, node name, model number, and so forth?
The uname command provides details about your system.
uname -p Displays the chip type of the system. For example, PowerPC.
uname -r Displays the release number of the operating system.
uname -s Displays the system name. For example, AIX.
uname -n Displays the name of the node.
uname -a Displays the system name, nodename, version, machine ID.
uname -M Displays the system model name. For example, IBM, 9114-275.
uname -v Displays the operating system version.
uname -m Displays the machine ID number of the hardware running the system.
uname -u Displays the system ID number.
AIX
What version, release, and maintenance level of AIX is running on my system?
Type one of the following:
oslevel -r
lslpp -h bos.rte
How can I determine which fileset updates are missing from a particular AIX level?
To determine which fileset updates are missing from 5300-04, for example, run the following command:
oslevel -rl 5300-04
What SP (Service Pack) is installed on my system?
To see which SP is currently installed on the system, run the oslevel -s command. Sample output for an AIX 5L Version 5.3 system, with TL4, and SP2 installed would be:
oslevel –s
5300-04-02
Is a CSP (Concluding Service Pack) installed on my system?
To see if a CSP is currently installed on the system, run the oslevel -s command. Sample output for an AIX 5L Version 5.3 system, with TL3, and CSP installed would be:
oslevel –s
5300-03-CSP
How do I create a file system?
The following command will create, within volume group testvg, a jfs file system of 10MB with mounting point /fs1:
crfs -v jfs -g testvg -a size=10M -m /fs1
The following command will create, within volume group testvg, a jfs2 file system of 10MB with mounting point /fs2 and having read only permissions:
crfs -v jfs2 -g testvg -a size=10M -p ro -m /fs2
How do I change the size of a file system?
To increase the /usr file system size by 1000000 512-byte blocks, type:
chfs -a size=+1000000 /usr
Note:
In AIX 5.3, the size of a JFS2 file system can be shrunk as well.
How do I mount a CD?
Type the following:
mount -V cdrfs -o ro /dev/cd0 /cdrom
How do I mount a file system?
The following command will mount file system /dev/fslv02 on the /test directory:
mount /dev/fslv02 /test
How do I mount all default file systems (all standard file systems in the /etc/filesystems file marked by the mount=true attribute)?
The following command will mount all such file systems:
mount {-a|all}
How do I unmount a file system?
Type the following command to unmount /test file system:
umount /test
How do I display mounted file systems?
Type the following command to display information about all currently mounted file systems:
mount
How do I remove a file system?
Type the following command to remove the /test file system:
rmfs /test
How can I defragment a file system?
The defragfs command can be used to improve or report the status of contiguous space within a file system. For example, to defragment the file system /home, use the following command:
defragfs /home
Which fileset contains a particular binary?
To show bos.acct contains /usr/bin/vmstat, type:
lslpp -w /usr/bin/vmstat
Or to show bos.perf.tools contains /usr/bin/svmon, type:
which_fileset svmon
How do I display information about installed filesets on my system?
Type the following:
lslpp -l
How do I determine if all filesets of maintenance levels are installed on my system?
Type the following:
instfix -i | grep ML
How do I determine if a fix is installed on my system?
To determine if IY24043 is installed, type:
instfix -ik IY24043
How do I install an individual fix by APAR?
To install APAR IY73748 from /dev/cd0, for example, enter the command:
instfix -k IY73748 -d /dev/cd0
How do I verify if filesets have required prerequisites and are completely installed?
To show which filesets need to be installed or corrected, type:
lppchk -v
How do I get a dump of the header of the loader section and the symbol entries in symbolic representation?
Type the following:
dump -Htv
How do I determine the amount of paging space allocated and in use?
Type the following:
lsps -a
How do I increase a paging space?
You can use the chps -s command to dynamically increase the size of a paging space. For example, if you want to increase the size of hd6 with 3 logical partitions, you issue the following command:
chps -s 3 hd6
How do I reduce a paging space?
You can use the chps -d command to dynamically reduce the size of a paging space. For example, if you want to decrease the size of hd6 with four logical partitions, you issue the following command:
chps -d 4 hd6
How would I know if my system is capable of using Simultaneous Multi-threading (SMT)?
Your system is capable of SMT if it's a POWER5-based system running AIX 5L Version 5.3.
How would I know if SMT is enabled for my system?
If you run the smtctl command without any options, it tells you if it's enabled or not.
Is SMT supported for the 32-bit kernel?
Yes, SMT is supported for both 32-bit and 64-bit kernel.
How do I enable or disable SMT?
You can enable or disable SMT by running the smtctl command. The following is the syntax:
smtctl [ -m off | on [ -w boot | now]]
The following options are available:
-m off Sets SMT mode to disabled.
-m on Sets SMT mode to enabled.
-w boot Makes the SMT mode change effective on next and subsequent reboots if you run the bosboot command before the next system reboot.
-w now Makes the SMT mode change immediately but will not persist across reboot.
If neither the -w boot or the -w now options are specified, then the mode change is made immediately. It persists across subsequent reboots if you run the bosboot command before the next system reboot.
How do I get partition-specific information and statistics?
The lparstat command provides a report of partition information and utilization statistics. This command also provides a display of Hypervisor information.
Volume groups and logical volumes
How do I know if my volume group is normal, big, or scalable?
Run the lsvg command on the volume group and look at the value for MAX PVs. The value is 32 for normal, 128 for big, and 1024 for scalable volume group.
How to create a volume group?
Use the following command, where spartition_size sets the number of megabytes (MB) in each physical partition where the partition_size is expressed in units of MB from 1 through 1024. (It's 1 through 131072 for AIX 5.3.) The partition_size variable must be equal to a power of 2 (for example: 1, 2, 4, 8). The default value for standard and big volume groups is the lowest value to remain within the limitation of 1016 physical partitions per physical volume. The default value for scalable volume groups is the lowest value to accommodate 2040 physical partitions per physical volume.
mkvg -y name_of_volume_group -s partition_size list_of_hard_disks
How can I change the characteristics of a volume group?
You use the following command to change the characteristics of a volume group:
chvg
How do I create a logical volume?
Type the following:
mklv -y name_of_logical_volume name_of_volume_group number_of_partition
How do I increase the size of a logical volume?
To increase the size of the logical volume represented by the lv05 directory by three logical partitions, for example, type:
extendlv lv05 3
How do I display all logical volumes that are part of a volume group (for example, rootvg)?
You can display all logical volumes that are part of rootvg by typing the following command:
lsvg -l rootvg
How do I list information about logical volumes?
Run the following command to display information about the logical volume lv1:
lslv lv1
How do I remove a logical volume?
You can remove the logical volume lv7 by running the following command:
rmlv lv7
The rmlv command removes only the logical volume, but does not remove other entities, such as file systems or paging spaces that were using the logical volume.
How do I mirror a logical volume?
1. mklvcopy LogicalVolumeName Numberofcopies
2. syncvg VolumeGroupName
How do I remove a copy of a logical volume?
You can use the rmlvcopy command to remove copies of logical partitions of a logical volume. To reduce the number of copies of each logical partition belonging to logical volume testlv, enter:
rmlvcopy testlv 2
Each logical partition in the logical volume now has at most two physical partitions.
Queries about volume groups
To show volume groups in the system, type:
lsvg
To show all the characteristics of rootvg, type:
lsvg rootvg
To show disks used by rootvg, type:
lsvg -p rootvg
How to add a disk to a volume group?
Type the following:
extendvg VolumeGroupName hdisk0 hdisk1 ... hdiskn
How do I find out what the maximum supported logical track group (LTG) size of my hard disk?
You can use the lquerypv command with the -M flag. The output gives the LTG size in KB. For instance, the LTG size for hdisk0 in the following example is 256 KB.
/usr/sbin/lquerypv -M hdisk0
256
You can also run the lspv command on the hard disk and look at the value for MAX REQUEST.
What does syncvg command do?
The syncvg command is used to synchronize stale physical partitions. It accepts names of logical volumes, physical volumes, or volume groups as parameters.
For example, to synchronize the physical partitions located on physical volumes hdisk6 and hdisk7, use:
syncvg -p hdisk4 hdisk5
To synchronize all physical partitions from volume group testvg, use:
syncvg -v testvg
How do I replace a disk?
1. extendvg VolumeGroupName hdisk_new
2. migratepv hdisk_bad hdisk_new
3. reducevg -d VolumeGroupName hdisk_bad
How can I clone (make a copy of ) the rootvg?
You can run the alt_disk_copy command to copy the current rootvg to an alternate disk. The following example shows how to clone the rootvg to hdisk1.
alt_disk_copy -d hdisk1
Network
How can I display or set values for network parameters?
The no command sets or displays current or next boot values for network tuning parameters.
How do I get the IP address of my machine?
Type one of the following:
ifconfig -a
host Fully_Qualified_Host_Name
For example, type host cyclop.austin.ibm.com.
How do I identify the network interfaces on my server?
Either of the following two commands will display the network interfaces:
lsdev -Cc if
ifconfig -a
To get information about one specific network interface, for example, tr0, run the command:
ifconfig tr0
How do I activate a network interface?
To activate the network interface tr0, run the command:
ifconfig tr0 up
How do I deactivate a network interface?
For example, to deactivate the network interface tr0, run the command:
ifconfig tr0 down
Kernel
How would I know if I am running a 32-bit kernel or 64-bit kernel?
To display if the kernel is 32-bit enabled or 64-bit enabled, type:
bootinfo -K
How do I know if I am running a uniprocessor kernel or a multiprocessor kernel?
/unix is a symbolic link to the booted kernel. To find out what kernel mode is running, enter ls -l /unix and see what file /unix it links to. The following are the three possible outputs from the ls -l /unix command and their corresponding kernels:
/unix -> /usr/lib/boot/unix_up # 32 bit uniprocessor kernel
/unix -> /usr/lib/boot/unix_mp # 32 bit multiprocessor kernel
/unix -> /usr/lib/boot/unix_64 # 64 bit multiprocessor kernel
Note:
AIX 5L Version 5.3 does not support a uniprocessor kernel.
How can I change from one kernel mode to another?
During the installation process, one of the kernels, appropriate for the AIX version and the hardware in operation, is enabled by default. Let us use the method from the previous question and assume the 32-bit kernel is enabled. Let us also assume that you want to boot it up in the 64-bit kernel mode. This can be done by executing the following commands in sequence:
ln -sf /usr/lib/boot/unix_64 /unix
ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix
bosboot -ad /dev/hdiskxx
shutdown -r
The /dev/hdiskxx directory is where the boot logical volume /dev/hd5 is located. To find out what xx is in hdiskxx, run the following command:
lslv -m hd5
Note:
In AIX 5.2, the 32-bit kernel is installed by default. In AIX 5.3, the 64-bit kernel is installed on 64-bit hardware and the 32-bit kernel is installed on 32-bit hardware by default.
Hardware
How would I know if my machine is capable of running AIX 5L Version 5.3?
AIX 5L Version 5.3 runs on all currently supported CHRP (Common Hardware Reference Platform)-based POWER hardware.
How would I know if my machine is CHRP-based?
Run the prtconf command. If it's a CHRP machine, the string chrp appears on the Model Architecture line.
How would I know if my System p machine (hardware) is 32-bit or 64-bit?
To display if the hardware is 32-bit or 64-bit, type:
bootinfo -y
How much real memory does my machine have?
To display real memory in kilobytes (KB), type one of the following:
bootinfo -r
lsattr -El sys0 -a realmem
Can my machine run the 64-bit kernel?
64-bit hardware is required to run the 64-bit kernel.
What are the values of attributes for devices in my system?
To list the current values of the attributes for the tape device, rmt0, type:
lsattr -l rmt0 -E
To list the default values of the attributes for the tape device, rmt0, type:
lsattr -l rmt0 -D
To list the possible values of the login attribute for the TTY device, tty0, type:
lsattr -l tty0 -a login -R
To display system level attributes, type:
lsattr -E -l sys0
How many processors does my system have?
To display the number of processors on your system, type:
lscfg | grep proc
How many hard disks does my system have and which ones are in use?
To display the number of hard disks on your system, type:
lspv
How do I list information about a specific physical volume?
To find details about hdisk1, for example, run the following command:
lspv hdisk1
How do I get a detailed configuration of my system?
Type the following:
lscfg
The following options provide specific information:
-p Displays platform-specific device information. The flag is applicable to AIX 4.2.1 or later.
-v Displays the VPD (Vital Product Database) found in the customized VPD object class.
For example, to display details about the tape drive, rmt0, type:
lscfg -vl rmt0
You can obtain very similar information by running the prtconf command.
How do I find out the chip type, system name, node name, model number, and so forth?
The uname command provides details about your system.
uname -p Displays the chip type of the system. For example, PowerPC.
uname -r Displays the release number of the operating system.
uname -s Displays the system name. For example, AIX.
uname -n Displays the name of the node.
uname -a Displays the system name, nodename, version, machine ID.
uname -M Displays the system model name. For example, IBM, 9114-275.
uname -v Displays the operating system version.
uname -m Displays the machine ID number of the hardware running the system.
uname -u Displays the system ID number.
AIX
What version, release, and maintenance level of AIX is running on my system?
Type one of the following:
oslevel -r
lslpp -h bos.rte
How can I determine which fileset updates are missing from a particular AIX level?
To determine which fileset updates are missing from 5300-04, for example, run the following command:
oslevel -rl 5300-04
What SP (Service Pack) is installed on my system?
To see which SP is currently installed on the system, run the oslevel -s command. Sample output for an AIX 5L Version 5.3 system, with TL4, and SP2 installed would be:
oslevel –s
5300-04-02
Is a CSP (Concluding Service Pack) installed on my system?
To see if a CSP is currently installed on the system, run the oslevel -s command. Sample output for an AIX 5L Version 5.3 system, with TL3, and CSP installed would be:
oslevel –s
5300-03-CSP
How do I create a file system?
The following command will create, within volume group testvg, a jfs file system of 10MB with mounting point /fs1:
crfs -v jfs -g testvg -a size=10M -m /fs1
The following command will create, within volume group testvg, a jfs2 file system of 10MB with mounting point /fs2 and having read only permissions:
crfs -v jfs2 -g testvg -a size=10M -p ro -m /fs2
How do I change the size of a file system?
To increase the /usr file system size by 1000000 512-byte blocks, type:
chfs -a size=+1000000 /usr
Note:
In AIX 5.3, the size of a JFS2 file system can be shrunk as well.
How do I mount a CD?
Type the following:
mount -V cdrfs -o ro /dev/cd0 /cdrom
How do I mount a file system?
The following command will mount file system /dev/fslv02 on the /test directory:
mount /dev/fslv02 /test
How do I mount all default file systems (all standard file systems in the /etc/filesystems file marked by the mount=true attribute)?
The following command will mount all such file systems:
mount {-a|all}
How do I unmount a file system?
Type the following command to unmount /test file system:
umount /test
How do I display mounted file systems?
Type the following command to display information about all currently mounted file systems:
mount
How do I remove a file system?
Type the following command to remove the /test file system:
rmfs /test
How can I defragment a file system?
The defragfs command can be used to improve or report the status of contiguous space within a file system. For example, to defragment the file system /home, use the following command:
defragfs /home
Which fileset contains a particular binary?
To show bos.acct contains /usr/bin/vmstat, type:
lslpp -w /usr/bin/vmstat
Or to show bos.perf.tools contains /usr/bin/svmon, type:
which_fileset svmon
How do I display information about installed filesets on my system?
Type the following:
lslpp -l
How do I determine if all filesets of maintenance levels are installed on my system?
Type the following:
instfix -i | grep ML
How do I determine if a fix is installed on my system?
To determine if IY24043 is installed, type:
instfix -ik IY24043
How do I install an individual fix by APAR?
To install APAR IY73748 from /dev/cd0, for example, enter the command:
instfix -k IY73748 -d /dev/cd0
How do I verify if filesets have required prerequisites and are completely installed?
To show which filesets need to be installed or corrected, type:
lppchk -v
How do I get a dump of the header of the loader section and the symbol entries in symbolic representation?
Type the following:
dump -Htv
How do I determine the amount of paging space allocated and in use?
Type the following:
lsps -a
How do I increase a paging space?
You can use the chps -s command to dynamically increase the size of a paging space. For example, if you want to increase the size of hd6 with 3 logical partitions, you issue the following command:
chps -s 3 hd6
How do I reduce a paging space?
You can use the chps -d command to dynamically reduce the size of a paging space. For example, if you want to decrease the size of hd6 with four logical partitions, you issue the following command:
chps -d 4 hd6
How would I know if my system is capable of using Simultaneous Multi-threading (SMT)?
Your system is capable of SMT if it's a POWER5-based system running AIX 5L Version 5.3.
How would I know if SMT is enabled for my system?
If you run the smtctl command without any options, it tells you if it's enabled or not.
Is SMT supported for the 32-bit kernel?
Yes, SMT is supported for both 32-bit and 64-bit kernel.
How do I enable or disable SMT?
You can enable or disable SMT by running the smtctl command. The following is the syntax:
smtctl [ -m off | on [ -w boot | now]]
The following options are available:
-m off Sets SMT mode to disabled.
-m on Sets SMT mode to enabled.
-w boot Makes the SMT mode change effective on next and subsequent reboots if you run the bosboot command before the next system reboot.
-w now Makes the SMT mode change immediately but will not persist across reboot.
If neither the -w boot or the -w now options are specified, then the mode change is made immediately. It persists across subsequent reboots if you run the bosboot command before the next system reboot.
How do I get partition-specific information and statistics?
The lparstat command provides a report of partition information and utilization statistics. This command also provides a display of Hypervisor information.
Volume groups and logical volumes
How do I know if my volume group is normal, big, or scalable?
Run the lsvg command on the volume group and look at the value for MAX PVs. The value is 32 for normal, 128 for big, and 1024 for scalable volume group.
How to create a volume group?
Use the following command, where spartition_size sets the number of megabytes (MB) in each physical partition where the partition_size is expressed in units of MB from 1 through 1024. (It's 1 through 131072 for AIX 5.3.) The partition_size variable must be equal to a power of 2 (for example: 1, 2, 4, 8). The default value for standard and big volume groups is the lowest value to remain within the limitation of 1016 physical partitions per physical volume. The default value for scalable volume groups is the lowest value to accommodate 2040 physical partitions per physical volume.
mkvg -y name_of_volume_group -s partition_size list_of_hard_disks
How can I change the characteristics of a volume group?
You use the following command to change the characteristics of a volume group:
chvg
How do I create a logical volume?
Type the following:
mklv -y name_of_logical_volume name_of_volume_group number_of_partition
How do I increase the size of a logical volume?
To increase the size of the logical volume represented by the lv05 directory by three logical partitions, for example, type:
extendlv lv05 3
How do I display all logical volumes that are part of a volume group (for example, rootvg)?
You can display all logical volumes that are part of rootvg by typing the following command:
lsvg -l rootvg
How do I list information about logical volumes?
Run the following command to display information about the logical volume lv1:
lslv lv1
How do I remove a logical volume?
You can remove the logical volume lv7 by running the following command:
rmlv lv7
The rmlv command removes only the logical volume, but does not remove other entities, such as file systems or paging spaces that were using the logical volume.
How do I mirror a logical volume?
1. mklvcopy LogicalVolumeName Numberofcopies
2. syncvg VolumeGroupName
How do I remove a copy of a logical volume?
You can use the rmlvcopy command to remove copies of logical partitions of a logical volume. To reduce the number of copies of each logical partition belonging to logical volume testlv, enter:
rmlvcopy testlv 2
Each logical partition in the logical volume now has at most two physical partitions.
Queries about volume groups
To show volume groups in the system, type:
lsvg
To show all the characteristics of rootvg, type:
lsvg rootvg
To show disks used by rootvg, type:
lsvg -p rootvg
How to add a disk to a volume group?
Type the following:
extendvg VolumeGroupName hdisk0 hdisk1 ... hdiskn
How do I find out what the maximum supported logical track group (LTG) size of my hard disk?
You can use the lquerypv command with the -M flag. The output gives the LTG size in KB. For instance, the LTG size for hdisk0 in the following example is 256 KB.
/usr/sbin/lquerypv -M hdisk0
256
You can also run the lspv command on the hard disk and look at the value for MAX REQUEST.
What does syncvg command do?
The syncvg command is used to synchronize stale physical partitions. It accepts names of logical volumes, physical volumes, or volume groups as parameters.
For example, to synchronize the physical partitions located on physical volumes hdisk6 and hdisk7, use:
syncvg -p hdisk4 hdisk5
To synchronize all physical partitions from volume group testvg, use:
syncvg -v testvg
How do I replace a disk?
1. extendvg VolumeGroupName hdisk_new
2. migratepv hdisk_bad hdisk_new
3. reducevg -d VolumeGroupName hdisk_bad
How can I clone (make a copy of ) the rootvg?
You can run the alt_disk_copy command to copy the current rootvg to an alternate disk. The following example shows how to clone the rootvg to hdisk1.
alt_disk_copy -d hdisk1
Network
How can I display or set values for network parameters?
The no command sets or displays current or next boot values for network tuning parameters.
How do I get the IP address of my machine?
Type one of the following:
ifconfig -a
host Fully_Qualified_Host_Name
For example, type host cyclop.austin.ibm.com.
How do I identify the network interfaces on my server?
Either of the following two commands will display the network interfaces:
lsdev -Cc if
ifconfig -a
To get information about one specific network interface, for example, tr0, run the command:
ifconfig tr0
How do I activate a network interface?
To activate the network interface tr0, run the command:
ifconfig tr0 up
How do I deactivate a network interface?
For example, to deactivate the network interface tr0, run the command:
ifconfig tr0 down
WebSphere Password Decoder
This utility can decode WebSphere encoded passwords.
If you have lost your password(s), use this utility to recover them.
url: http://www.sysman.nl/wasdecoder/
If you have lost your password(s), use this utility to recover them.
url: http://www.sysman.nl/wasdecoder/
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