_chpwd_hook() { if [[ "$PWD" != "$PREVPWD" ]]; then ls PREVPWD="$PWD" fi } PROMPT_COMMAND=(_chpwd_hook)
shopt -s autocd alias r='cd -'
$ cd() { builtin cd $* && ls; } $ cd / bin boot cdrom dev etc home lib lib64 [...]
cd() { builtin cd "$@" && ls; }