Linux Cmd Tool 系列01—alias

Posted 2020-08-10

The alias cmd list your current aliases. For example :

alias

 

Use alias to shorten a long cmd in current shell session:

alias [name=[‘command‘]]

 

Use unalias to remove the alias , or use "\"(back-slash) before command to disable alias.

 

Your ~/.bashrc file might look like:

alias cp=‘cp ?vi‘ #to prompt when copying if you want to overwrite and will tell you where 
alias rm=‘rm ?i‘ #Prompts you if you really want to remove it.
alias mv=‘mv ?i‘ #Prompts you if you are going to overwrite something

System-wide aliases can be put in the /etc/bashrc

If you are already in one shell session and you want to apply the new .bashrc immediately :

source ~/.bashrc

 

Examples:

1. Simplify pathing

alias ..=‘cd ..‘
alias ...=‘cd ../../‘
alias ....=‘cd ../../../‘
alias .....=‘cd ../../../../‘

2. Call multiple cmds

alias pl=‘pwd; ls‘

3. Call other aliases

alias p="pwd"
alias l="ls -la"
alias l="p; l"

4. Creating two separate aliases simultaneously

alias p="pwd"; l="ls -al"

5. Remove all aliases

unalias -a