system environment/shells
- bash - The GNU Bourne Again shell
 - bash-completion - Programmable completion for Bash
 - busybox - Statically linked binary providing simplified versions of system commands
 - dash - Small and fast POSIX-compliant shell
 - fish - A friendly interactive shell
 - ksh - The Original ATT Korn Shell
 - mc - User-friendly text console file manager and visual shell
 - mksh - MirBSD enhanced version of the Korn Shell
 - nautilus-search-tool - A Nautilus extension that makes searching for files easier
 - tcsh - An enhanced version of csh, the C shell
 - zsh - A powerful interactive shell