http://www.fmi.uni-passau.de/archive/doc/unix/unixhelp/Unixhelp/shell_alias_ksh6.html (Einblicke ins Internet, 10/1995)To remove a command alias:
1. Edit the shell startup file and remove the containing the alias definition.
2. Save the changes and leave the editor.
3. Source the shell startup file to have the changes take immediate effect. For example:
. .kshrc