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Why I love zsh (and hate being forced to use bash)

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Why I love zsh (and hate being forced to use bash)

  • Smarter completion:
    • cd tab completion -- directories only
    • bash can do this, but needs the bash-completion package, usually comes separately
    • zsh always comes with completions, why doesn't bash?
  • Completion correction / directory smarts
    • if dir1/x exists and dir2 exists, then "dir/x<TAB>" completes to dir1/x
    • if name1 is a file and name2 is a directory with files in it, "name/<TAB>" completes to "name2/"
  • Better ctrl-R behaviour
    • alerts you if your ctrl-R is failing
    • completes it right on the prompt line while showing you what you're searching for below
  • ctrl-R, enter a search term, ctrl-R repeatedly to see earlier matches, then hit backspace
    • bash deletes characters in your search term
    • zsh backtracks through the matches you rejected with ctrl-R, i.e. "backspaces" your ctrl-R's
  • autopushd option -- every "cd" is implicitly a silent "pushd" so you can "popd" to go back any time
  • better popd behaviour if a directory no longer exists
    • zsh will still pop the stack, so subsequent popd's work
    • bash refuses to popd
  • incremental history saving option
    • saves after every command
    • my .zsh_history is chronological and always up-to-date, even with multiple shells running
    • in any shell, I can "fc -R ~/.zsh_history" to reload in order to reuse the latest commands
  • optional coloured completion (like "ls")
  • autocd option -- "executing" a directory will "cd" to it instead
    • e.g. if I start typing /some/dir/file and decide I want to switch to /some/dir instead, I just enter "/some/dir"
  • `some-command`<TAB> -- expand output of some-command right in your shell line
  • can automatically show exit status of last command
    • always know when something failed, even if the output doesn't make it obvious
  • can automatically show "time" output if a command takes more than <n> seconds
  • usually has the latest UI improvements first
    • most of bash's features originally came from zsh
  • probably a lot more that I've forgotten

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