1. back to the last directory 
    $ cd -
  2. clear terminal
    clear all 
    $ clear

    clear and keep history outputctrl + L

  3. save & take out directories 
    $ pushd my_dir # cd and save dir
$ popd my_dir # cd to the latest
  4. history
    For zsh: edit ~/.zshrc add 
    export HISTFILEFLESIZE=1000000000
export HISTSIZE=1000000000
export HISTTIMEFORMAT="[%F %T ]"
setopt HIST_IGNORE_ALL_DUPS

    Functions:

    • Drop dublicates.
    • Show date and time
$ history -E
    2  23.6.2022 18:53  cd

    5  23.6.2022 18:54  hisotry

    9  23.6.2022 18:54  ps -ef | clash

   10  23.6.2022 18:55  fg