ADD ALIAS COMMAND TO UBUNTU

Steps:

1. Open your terminal.
2. Open and edit your shell configuration file (usually ~/.bashrc for the default Bash shell, or ~/.zshrc if you are using Zsh) using nano editor:

   nano ~/.bashrc
   

3. Scroll to the very bottom of the file and add your custom alias commands. For example, to map different PHP binary paths to short alias commands:

   alias php83="/www/server/php/83/bin/php"
   alias php81="/www/server/php/81/bin/php"
   

4. Save the changes and exit the nano editor by pressing Ctrl + O, then Enter to save, and Ctrl + X to exit.
5. Apply the changes immediately to your current terminal session using the source command:

   source ~/.bashrc
   

6. Verify that the aliases are working properly by running the commands to check their versions:

   php83 -v
   php81 -v
   

Note:

• To view the list of all currently active aliases on your system, simply run the command alias.
• If you want the alias to be available globally for all users on the server, add the alias lines to the /etc/bash.bashrc file instead of ~/.bashrc.
• To temporarily bypass an alias and run the default or underlying system command, prepend a backslash before the command (example: \php83).
• To temporarily disable an alias, use the unalias command (example: unalias php83). To remove it permanently, delete the alias line from ~/.bashrc and run source ~/.bashrc.