To enable and start services on Alpine Linux, you can use the rc-update and service commands. Here’s the basic process: Enable the service: # rc-update add [service-name] default Replace [service-name] with the name of the service you want to enable, such as sshd for the SSH daemon. The default argument sets the service to … Read more
To find and tar (create an archive) files into a tar ball (.tar file) in Linux, you can use the tar command in combination with the find command. Here’s the basic syntax: $ find [directory] -name [pattern] -exec tar -czf [tarfile.tar.gz] {} + [directory]: The directory you want to search for files. [pattern]: A … Read more
To execute a shell script in Linux, you need to follow these steps: Give execute permission to the script: $ chmod +x script.sh Run the script: $ ./script.sh You can also run the script by specifying the interpreter, like this: $ sh script.sh Or: $ bash script.sh If the script is … Read more
To change the root password on Red Hat Enterprise Linux (RHEL), you can use the passwd command. This command allows you to change the password for the current user (in this case, the root user). Here’s how you can use the passwd command to change the root password: Log in to your system as the … Read more
To find a file in a directory and its subdirectories on Unix, you can use the find command. Here’s the basic syntax of the find command: $ find [path] [expression] Where: [path] is the directory or directories where you want to search for the file. By default, [path] is the current directory (.). [expression] … Read more
To show a recursive directory listing on Linux or Unix, you can use the ls command with the -R option: $ ls -R This will display a recursive listing of all the files and directories under the current directory, including the subdirectories and their contents. You can also use the find command to achieve … Read more
Bash aliases are only available in the current shell session, so they are not automatically available in an SSH-based session. However, you can make your aliases available in an SSH-based session by adding them to a shell startup file, such as ~/.bashrc, ~/.bash_profile, or ~/.bash_aliases. Here’s an example of how you could create an alias … Read more
You can use the w command to show the current logged-in users on a Linux system: $ w This command will show the following information for each user: USER: the username of the user. TTY: the terminal associated with the user. FROM: the hostname or IP address from which the user logged in. LOGIN@: … Read more
To check the running processes on an AIX system, you can use the ps command. Here’s an example: $ ps -ef This command will show a list of all the running processes and their status information. The output includes the following columns: UID: the user ID of the owner of the process. PID: the … Read more
You can add an SSH key to a Linux cloud image in a qcow2 format using the virt-sysprep utility. Here are the steps: Boot the cloud image in a virtual machine. Install the virt-sysprep utility: # apt-get update # apt-get install libguestfs-tools Copy your SSH public key to the virtual machine: $ ssh-copy-id user@virtual-machine Run … Read more