Users often find rm (and even rm –i) too unforgiving because this utility removes files irrevocably. Create an alias named delete that moves files specified by its argument(s) into the ~/.trash directory. Create a second alias named undelete that moves a file from the ~/.trash directory into the working directory. Put the following line in your ~/.logout file to remove any files that you deleted during the login session:
/bin/rm -f $HOME/.trash/* >& /dev/null
These commands create the required aliases:
$ alias delete mv \!:\* ~/.trash
$ alias undelete mv ~/.trash/\!:1
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