Monthly Archives: November 2023

Kubernetes command line

Posted on by
Reply

Kubernetes provides a powerful command-line interface (CLI) called kubectl that allows you to interact with Kubernetes clusters. Here are some commonly used kubectl commands:

Cluster Information:

  1. View Cluster Information:kubectl cluster-info
  2. Display Nodes:kubectl get nodes

Pods:

  1. List Pods:kubectl get pods
  2. Pod Details:kubectl describe pod <pod_name>
  3. Create Pod:kubectl apply -f pod.yaml

Deployments:

  1. List Deployments:kubectl get deployments
  2. Scale Deployment:kubectl scale deployment <deployment_name> --replicas=3
  3. Rollout History:kubectl rollout history deployment <deployment_name>

Services:

  1. List Services:kubectl get services
  2. Service Details:kubectl describe service <service_name>

ConfigMaps and Secrets:

  1. List ConfigMaps:kubectl get configmaps
  2. List Secrets:kubectl get secrets

Logs and Exec:

  1. Pod Logs:kubectl logs <pod_name>
  2. Run Command in Pod:kubectl exec -it <pod_name> -- /bin/sh

Namespaces:

  1. List Namespaces:kubectl get namespaces
  2. Switch Namespace:kubectl config set-context --current --namespace=<namespace_name>

Contexts and Configuration:

  1. List Contexts:kubectl config get-contexts
  2. Switch Context:kubectl config use-context <context_name>

Deleting Resources:

  1. Delete Pod:kubectl delete pod <pod_name>
  2. Delete Deployment:kubectl delete deployment <deployment_name>
  3. Delete Service:kubectl delete service <service_name>

More Resources:

Remember to replace <pod_name>, <deployment_name>, <service_name>, etc., with the actual names of your Kubernetes resources.

These are just a few examples, and kubectl provides a wide range of commands for managing various aspects of Kubernetes clusters. Always refer to the official Kubernetes documentation for detailed information and options.

IBM AIX: How to create a file system

Posted on by
Reply

On IBM AIX, you can create a file system using the crfs command. Below are the steps to create a simple Journaled File System (JFS) on AIX:

  1. Determine Disk and Logical Volume: Identify the physical disk and logical volume that you want to use for the file system. You can use the lspv and lsvg commands to list physical volumes and volume groups, respectively.lspv lsvg
  2. Create a Logical Volume: Use the mklv command to create a logical volume. Replace <volume_group> with the actual volume group name, <logical_volume> with the logical volume name, and <size> with the desired size.mklv -y <logical_volume> -t jfs2 <volume_group> <size>
  3. Create a File System: Use the crfs command to create a file system on the logical volume you just created. Replace <mount_point> with the desired mount point for the file system.crfs -v jfs2 -d <logical_volume> -m <mount_point> -A yes -p rw
    • -v jfs2: Specifies the type of file system as Journaled File System 2 (JFS2).
    • -d <logical_volume>: Specifies the logical volume.
    • -m <mount_point>: Specifies the mount point for the file system.
    • -A yes: Enables automatic mount during system startup.
    • -p rw: Specifies the mount options as read-write.
  4. Mount the File System: Use the mount command to mount the newly created file system.mount <mount_point>
  5. Verify the File System: Use the df command to verify that the file system is mounted.df -g

This is a basic example of creating a JFS2 file system on AIX. Adjust the commands and options based on your specific requirements, such as choosing a different file system type or specifying additional mount options.

Always refer to the AIX documentation or consult with your system administrator for the most accurate and up-to-date information based on your AIX version.

Linux: Increasing the size of a file system on Linux

Posted on by
Reply

Increasing the size of a file system on Linux that is managed by Logical Volume Manager (LVM) involves several steps. Here’s a general guide assuming you’re working with an LVM-managed file system:

Steps to Increase File System Size Using LVM:

1. Check Current Disk Space:

df -h

2. Check LVM Configuration:

sudo vgdisplay # List volume groups sudo lvdisplay # List logical volumes

3. Extend the Logical Volume:

  • Identify the logical volume (LV) associated with the file system you want to extend.

sudo lvextend -l +100%FREE /dev/vg_name/lv_name

Replace vg_name with your volume group name and lv_name with your logical volume name.

4. Resize the File System:

  • Resize the file system to use the new space.
    • For ext4:bashCopy codesudo resize2fs /dev/vg_name/lv_name
    • For XFS:bashCopy codesudo xfs_growfs /mount_point

Replace /mount_point with the actual mount point of your file system.

5. Verify the Changes:

df -h

That’s it! You’ve successfully increased the size of your file system using LVM. Make sure to replace vg_name and lv_name with your specific volume group and logical volume names.

Example:

Let’s assume you have a volume group named vg_data and a logical volume named lv_data that you want to extend.

# Check current disk space df -h # Check LVM configuration sudo vgdisplay sudo lvdisplay # Extend the logical volume sudo lvextend -l +100%FREE /dev/vg_data/lv_data # Resize the ext4 file system sudo resize2fs /dev/vg_data/lv_data # Verify the changes df -h

Make sure to adapt the commands based on your specific volume group and logical volume names, as well as the file system type you are using. Always perform these operations with caution and have backups available, especially when dealing with critical data.

Linux: Sharing a command line terminal

Posted on by
Reply

Sharing a command line terminal on Linux can be done using various tools and methods. Below are a few common ways to share a terminal session:

  1. tmux (Terminal Multiplexer):
    • Install tmux if it’s not already installed:sudo apt-get install tmux # On Debian/Ubuntu sudo yum install tmux # On CentOS/RHEL
    • Start a tmux session:tmux
    • Run your commands inside the tmux session.
    • To detach from the session (leave it running in the background), press Ctrl-b followed by d.
    • To reattach to the session later:tmux attach
  2. screen:
    • Install screen if it’s not already installed:sudo apt-get install screen # On Debian/Ubuntu sudo yum install screen # On CentOS/RHEL
    • Start a screen session:screen
    • Run your commands inside the screen session.
    • To detach from the session, press Ctrl-a followed by d.
    • To reattach to the session later:bashCopy codescreen -r
  3. SSH (Secure Shell):
    • You can use SSH to connect to another machine and share a terminal.
    • On the machine you want to access:ssh user@remote_ip
    • Run your commands in the SSH session.
  4. Tmuxp:
    • tmuxp is a session manager for tmux that allows you to save and load tmux sessions easily.
    • Install tmuxp:bashCopy codepip install tmuxp
    • Create a tmuxp configuration file (~/.tmuxp/config.yaml) to define your session.
    • Start a session using:tmuxp load session_name
    Replace session_name with the name of your configuration file.

Choose the method that best fits your needs and preferences. Each method has its own set of features and benefits, so you might want to explore them further based on your use case.

URL for accessing the WebSphere Deployment Manager’s administrative console

Posted on by
Reply

The URL for accessing the WebSphere Deployment Manager’s administrative console depends on the specific configuration and port settings during the installation. By default, the administrative console is accessible over HTTPS on port 9043.

The general format for the URL is:

https://<hostname&gt;:9043/ibm/console

Replace <hostname> with the actual hostname or IP address of the machine where WebSphere Deployment Manager is installed.

So, for example, if your Deployment Manager is installed on a machine with the IP address 192.168.1.100, you would access the administrative console using:

https://192.168.1.100:9043/ibm/console

Please note that these are default settings, and the actual URL may be different based on your installation and configuration choices. If you’ve customized the ports during the installation, you’ll need to use the appropriate port number.

Additionally, make sure that you have the necessary security credentials (username and password) to log in to the administrative console.

IBM WebSphere Application Server (WAS) Edge Components – Load Balancer

Posted on by
Reply

IBM WebSphere Application Server (WAS) Edge Components includes the IBM HTTP Server (IHS) with Edge Components, which can be used for load balancing. The load balancing configuration is typically managed through the IBM IHS administrative commands.

Here are some basic commands for managing the IBM WAS Edge Components Load Balancer using the command line:

IBM HTTP Server (IHS) Administrative Commands:

  1. Start IBM HTTP Server:<IHS_HOME>/bin/apachectl start On Windows:bashCopy code<IHS_HOME>\bin\httpd.exe
  2. Stop IBM HTTP Server:<IHS_HOME>/bin/apachectl stop On Windows:bashCopy code<IHS_HOME>\bin\httpd.exe -k shutdown
  3. Restart IBM HTTP Server:<IHS_HOME>/bin/apachectl restart On Windows:bashCopy code<IHS_HOME>\bin\httpd.exe -k restart
  4. Check Configuration Syntax:<IHS_HOME>/bin/apachectl configtest On Windows:bashCopy code<IHS_HOME>\bin\httpd.exe -t

Load Balancer Configuration:

The load balancing configuration in IBM IHS involves modifying the httpd.conf file to include directives related to load balancing. The specific configuration details depend on the version of IBM IHS and the desired load balancing method (e.g., mod_proxy_balancer, mod_jk).

For example, using mod_proxy_balancer, you might include configurations like:

apache

# Load Balancer Configuration <Proxy balancer://mycluster> BalancerMember http://appserver1:8080 route=worker1 BalancerMember http://appserver2:8080 route=worker2 </Proxy> # Enable the load balancer ProxyPass /test balancer://mycluster/test ProxyPassReverse /test balancer://mycluster/test

Example Usage:

Assuming your IBM HTTP Server is installed in /opt/IBM/HTTPServer:

  1. Start IBM HTTP Server on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl start On Windows:/opt/IBM/HTTPServer/bin/httpd.exe
  2. Stop IBM HTTP Server on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl stop On Windows:/opt/IBM/HTTPServer/bin/httpd.exe -k shutdown
  3. Restart IBM HTTP Server on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl restart On Windows:/opt/IBM/HTTPServer/bin/httpd.exe -k restart
  4. Check Configuration Syntax on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl configtest On Windows:/opt/IBM/HTTPServer/bin/httpd.exe -t

Additional Considerations:

  • Ensure that the necessary environment variables are set before running the commands.
  • Always refer to the official IBM documentation specific to your version of IBM IHS and the Edge Components for the most accurate and up-to-date information.

Please note that the commands and configurations may have changed or been updated since my last knowledge update in January 2022. Always check the official IBM documentation for the version you are using.

IBM HTTP Server – Start and Stop command line

Posted on by
Reply

Starting and stopping IBM HTTP Server (IHS) involves using the provided command-line scripts. Below are the basic commands for starting and stopping IBM HTTP Server:

Starting and Stopping IBM HTTP Server:

  1. Start IBM HTTP Server:
    • On Unix/Linux:<IHS_HOME>/bin/apachectl start
    • On Windows:<IHS_HOME>\bin\httpd.exe or use the Windows Services.
  2. Stop IBM HTTP Server:
    • On Unix/Linux:<IHS_HOME>/bin/apachectl stop
    • On Windows:<IHS_HOME>\bin\httpd.exe -k shutdown or use the Windows Services.

Note:

  • Replace <IHS_HOME> with the actual path to your IBM HTTP Server installation directory.

Example Usage:

Assuming your IBM HTTP Server is installed in /opt/IBM/HTTPServer:

  1. Start IBM HTTP Server on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl start
  2. Start IBM HTTP Server on Windows:
    • Run the httpd.exe executable directly from the command prompt or use the Windows Services.
  3. Stop IBM HTTP Server on Unix/Linux:/opt/IBM/HTTPServer/bin/apachectl stop
  4. Stop IBM HTTP Server on Windows:/opt/IBM/HTTPServer/bin/httpd.exe -k shutdown or use the Windows Services.

Additional Considerations:

  • Ensure that the necessary environment variables are set before running the commands.
  • For Windows, you may need to run the command prompt as an administrator to start and stop services.
  • You may use the -k option with httpd.exe on Windows for additional control options. For example:<IHS_HOME>\bin\httpd.exe -k restart This will restart the IBM HTTP Server.

Always refer to the official IBM documentation specific to your version of IBM HTTP Server for the most accurate and up-to-date information. The commands and paths might vary based on the version of IBM HTTP Server you are using.

IBM WebSphere Application Server – Start/Stop command line

Posted on by
Reply

Starting and stopping IBM WebSphere Application Server (WAS) Network Deployment involves managing the deployment manager, application servers, and node agents. Here are the basic commands for starting and stopping in a command-line environment:

Starting and Stopping Deployment Manager:

  1. Start Deployment Manager:<WAS_HOME>/bin/startManager.sh
  2. Stop Deployment Manager:<WAS_HOME>/bin/stopManager.sh

Starting and Stopping Nodes:

  1. Start Node Agent:<WAS_HOME>/profiles/<NodeProfile>/bin/startNode.sh
  2. Stop Node Agent:<WAS_HOME>/profiles/<NodeProfile>/bin/stopNode.sh
  3. Start Application Servers on a Node:<WAS_HOME>/profiles/<NodeProfile>/bin/startServer.sh serverName
  4. Stop Application Servers on a Node:<WAS_HOME>/profiles/<NodeProfile>/bin/stopServer.sh serverName

Note:

  • Replace <WAS_HOME> with the actual path to your WebSphere Application Server installation directory.
  • <NodeProfile> represents the profile name of the node.

Example Usage:

Assuming your WebSphere Application Server is installed in /opt/IBM/WebSphere/AppServer:

  1. Start Deployment Manager:/opt/IBM/WebSphere/AppServer/bin/startManager.sh
  2. Start Node Agent:/opt/IBM/WebSphere/AppServer/profiles/YourNodeProfile/bin/startNode.sh
  3. Start Application Servers on a Node:/opt/IBM/WebSphere/AppServer/profiles/YourNodeProfile/bin/startServer.sh server1

Additional Considerations:

  • Ensure that the necessary environment variables are set before running the commands.
  • It’s recommended to use the startServer and stopServer scripts from the node’s profile directory.

Always refer to the official IBM documentation specific to your version of WebSphere Application Server for the most accurate and up-to-date information. The commands and paths might vary based on the version of WebSphere Application Server you are using.

IBM WebSpere Application Server command line

Posted on by
Reply

The IBM WebSphere Application Server (WAS) wsadmin command-line tool provides a comprehensive set of commands for administering and configuring WebSphere environments. Below are some commonly used commands and their descriptions. Please note that the availability and syntax of commands may vary depending on the version of WebSphere Application Server you are using.

Common wsadmin Commands:

  1. connect:
    • Syntax: connect [hostname] [port] [username] [password]
    • Connects to a WebSphere Application Server instance.
  2. disconnect:
    • Syntax: disconnect
    • Disconnects from the connected server.
  3. AdminApp:
    • Commands for managing applications.
      • AdminApp.install('appPath', ['-appname', 'appName', '-node', 'nodeName', '-server', 'serverName']): Installs an application.
      • AdminApp.uninstall('appName'): Uninstalls an application.
  4. AdminConfig:
    • Commands for managing server configuration.
      • AdminConfig.show(): Displays the current configuration.
      • AdminConfig.modify(params): Modifies the server configuration.
      • AdminConfig.save(): Saves the configuration changes.
  5. AdminTask:
    • Commands for various administrative tasks.
      • AdminTask.listServers(): Lists all servers in the cell.
      • AdminTask.stopServer('serverName'): Stops a server.
      • AdminTask.startServer('serverName'): Starts a server.
  6. AdminControl:
    • Commands for controlling and querying server runtime information.
      • AdminControl.completeObjectName('type=Server,node=nodeName,process=serverName,*'): Retrieves the ObjectName for a server.
      • AdminControl.invoke('serverName', 'start'): Invokes a start operation on a server.
  7. Help:
    • Syntax: help [command]
    • Displays help information for a specific command.

Example Usage:

# Connect to the server connect localhost 8880 admin mypassword # Install an application AdminApp.install('/path/to/your/app.ear', ['-appname', 'YourAppName', '-node', 'Node1', '-server', 'server1']) # Save configuration changes AdminConfig.save() # Disconnect from the server disconnect

Additional Resources:

Always refer to the official IBM documentation specific to your version of WebSphere Application Server for the most accurate and up-to-date information. The provided links are based on my knowledge cutoff date in January 2022, and newer versions may have updated documentation.

IBM MQ Series main command line

Posted on by
Reply

IBM MQ Series, now known simply as IBM MQ, is a messaging middleware that allows applications to communicate with each other. Administration of IBM MQ involves using various commands to manage queues, topics, channels, and other aspects of the messaging system. Here are some of the main IBM MQ administration commands:

  1. Display Queue Manager Information: dspmqinf
  2. Create Queue Manage: crtmqm
  3. Start Queue Manager: strmqm <QueueManagerName>
  4. Stop Queue Manager: endmqm <QueueManagerName>
  5. Display List of Queue Managers: dspmq
  6. Display Queues: dspmq -m <QueueManagerName>
  7. Create Local Queue: runmqsc <QueueManagerName> Inside the runmqsc console: define qlocal(<QueueName>) end
  8. Create Remote Queue: runmqsc <QueueManagerName> Inside the runmqsc console:define qremote(<QueueName>) RNAME('<RemoteQueueManager>') XMITQ('<TransmissionQueue>') end
  9. Display Channels: dis chl(<ChannelName>)
  10. Start Channel: start chl(<ChannelName>)
  11. Stop Channel: stop chl(<ChannelName>)
  12. Display Listeners: dis listener(<ListenerName>)
  13. Start Listener: start listener(<ListenerName>)
  14. Stop Listener: stop listener(<ListenerName>)
  15. Display Topic Information: dis topic(<TopicName>)
  16. Create Topic Object: runmqsc <QueueManagerName> Inside the runmqsc console: define topic(<TopicName>) topicstr('<TopicString>') end

These commands are a subset of the many commands available for IBM MQ administration. Always refer to the official IBM MQ documentation for the most up-to-date and comprehensive information on IBM MQ administration commands and practices.