this post was submitted on 22 Jul 2024
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Programming

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[–] [email protected] 17 points 4 months ago (5 children)

Ctl-U to delete everything on the line before cursor.

Ctl-E to skip to end of line.

Ctl-A to skip to beginning of line.

[–] [email protected] 12 points 4 months ago (3 children)

Or, just use Home and End like they were intended! Kids these days….

[–] NostraDavid 6 points 4 months ago* (last edited 4 months ago)

Kids these days….

These Ctrl keys are shortcuts from Emacs - there's a Bash settings to switch to vi-mode if you so wish. Anyway, the first Emacs was written in 1981, probably on a PDP-11, which did not have Home and End! Same reason Neovim uses "yank" instead of "copy". ctrl-c/ctrl-v did not exist as a shortcut back when vi was being written!

I know you didn't intend to be mean or anything, but maaaaaan kids these days don't know their history (not entirely your fault, btw)😆

[–] [email protected] 2 points 4 months ago

This tip is super useful to me because not everyone is using a PC. On a PC sure, I would use the Home and End keys all the time. Now I'm using a laptop as my main computer and the Home and End keys are in a weird position that even to this day, 4ish years of laptop use, I still have to actually look at the keys to find them.

[–] Ferk 0 points 4 months ago* (last edited 4 months ago)

That's horrible for muscle memory, every time I switch desk/keyboard I have to re-learn the position of the home/end/delete/PgUp/PgDn keys.

I got used to Ctrl-a / Ctrl-e and it became second nature, my hands don't have to fish for extra keys, to the point that it becomes annoying when a program does not support that. Some map Ctrl-a to "Select all" so, for input fields where the selection is one line, I'd rather Ctrl-a then left/right to go to the beginning/end than fish for home/end, wherever they are.

[–] [email protected] 7 points 4 months ago (1 children)

Ctrl-y to paste what Ctrl-u deleted or cut

[–] [email protected] 2 points 4 months ago

That's a new one for me. Thanks!

[–] [email protected] 2 points 4 months ago

If you're a VIM motions fan, you can always install the zsh-vi-mode: https://github.com/jeffreytse/zsh-vi-mode.

[–] Hammerheart 2 points 4 months ago* (last edited 4 months ago) (1 children)

ctrl-b: move cursor back one character

ctrl-f: move cursor foward one character

ctrl-d: delete character under cursor

[–] [email protected] 1 points 4 months ago (1 children)

But that's more key presses than just using existing keys

[–] Hammerheart 1 points 4 months ago

I find it easier using my pinky to hit ctrl than taking my fingers off the home row to use the arrow keys.

[–] Ferk 1 points 4 months ago* (last edited 4 months ago)
  • Alt-delete deletes the whole word before cursor
  • Alt-d deletes the whole word after cursor
  • Ctrl-k deletes (kill) everything after the cursor

Whatever is deleted is stored in the "killring" and can be pasted(yanked) back with Ctrl-y (like someone else already mentioned), consecutive uses of Alt-delete/Alt-d add to the killring.

  • Alt-b / Alt-f moves one word backwards / forwards
  • Alt-t swaps (translocates) the current word with the previous one
  • Ctrl-_ undo last edit operation

All those bindings are the same as in emacs.

Also, normally Ctrl-d inserts the end-of-file character, and typically can be used to close an active shell session or when you have some other interpreter open in the terminal for interactive input.

[–] [email protected] 5 points 4 months ago* (last edited 4 months ago)

My favorite tips are:

You can filter the output of a command. Most commands return parameters like (output, error) so you can filter them by number like 1>/dev/null will filter the output and only show the errors, and 2>/dev/null will filter the errors and only show the output. Also if you want a command to run silently but it doesn't have it's own built-in quiet mode you can add &>/dev/null which will filter everything.

Bash (and other shell's I assume) can be fully customized. In addition to the .bashrc file in your home directory, there are also a few common files that bash will look for like .bash_aliases, .bash_commands, .bash_profile or you can create your own and just add to the end of the .bashrc file ./YOUR_CUSTOM_BASH_FILE_NAME

Inside that file you can add any custom commands you want to run for every bash shell like aliases and what not.

I personally often use a simple update command like so alias up='sudo apt update -y && sudo apt upgrade -y && sudo apt autoremove -y' which just makes running updates, upgrades, and clean-up so much easier. Just type up and enter your password. I have previously added in things like &>/dev/null to quiet the commands and echo Fetching updates... to make some commands quieter but still give some simple feedback.

There's also the basics of moving around a terminal command as others have pointed out. The easiest and the one I use the most is if you hold CTRL+LEFT_ARROW the cursor will move entire words instead of one character at a time. Very helpful if you need to change something in the middle of a command.

[–] [email protected] 1 points 4 months ago (1 children)

What can tmux do that you can't do using startup and exiting scripts?

[–] [email protected] 7 points 4 months ago* (last edited 4 months ago) (2 children)

Retain sessions when you're over SSH and get disconnected.

I'm surprised this wasn't mentioned, since it's my only use case for tmux.

[–] [email protected] 2 points 4 months ago

I use dtach for this feature

[–] [email protected] 1 points 4 months ago

I should've just looked it up but got lazy to be honest.

I use Dreamhost to connect to IRC support channels using irssi. I go through Dreamhost since it hides my home IP address. It disconnects me frequently. This would be very useful.

Thank you for the info.

[–] tyler 1 points 4 months ago (1 children)

You can use - everywhere you can use a ref in a git command. I very often use

git checkout master
git pull
git checkout -
git merge -

(Of course that’s all aliased and I have other flags in there too, but that’s the gist)

[–] NostraDavid 1 points 4 months ago (1 children)

Same for cd -. Nice if you want to go to /etc/blah, and then back to where you were.

You can also use pushd and popd which will push and pop directories from a stack, if you need to do something more complex.

Also, if you want to switch faster between branches, slap this in your ~/.gitconfig under [alias]:

co = !git checkout $(git for-each-ref refs/heads/ --format='%(refname:short)' | fzf)

Presuming you've got fzf installed, you can now git co (co = checkout) to get a menu with fuzzy find capabilities to switch between branches. Nice if branch names are long/similar/only-different-at-the-end.

fzf is dope.

[–] tyler 1 points 4 months ago

I have fzf-git for all of that, but honestly I don't ever use it, as I'm hardly ever switching between branches and tab complete is enough for me in most cases.

###
# FZF GIT
###
# Deciphered from fzf-file-widget. Somewhat unclear why it doesn't exist already!
function fzf_add_to_commandline -d 'add stdin to the command line, for fzf functions'
  #git checkout $1
  read -l result
  
  commandline -t ""
  commandline -it -- (string escape $result)
  commandline -f repaint
end

function fzf_checkout -d "git checkout"
  read -l result
  git checkout $result
end


# https://gist.github.com/aluxian/9c6f97557b7971c32fdff2f2b1da8209
function __git_fzf_is_in_git_repo
  command -s -q git
    and git rev-parse HEAD >/dev/null 2>&1
end

function __git_fzf_git_status
  __git_fzf_is_in_git_repo; or return
  git -c color.status=always status --short | \
    fzf -m --ansi --preview 'git diff --color=always HEAD -- {-1} | head -500' | \
    cut -c4- | \
    sed 's/.* -> //' | \
    fzf_add_to_commandline
  commandline -f repaint
end

function __git_fzf_git_branch
  __git_fzf_is_in_git_repo; or return
  git branch -a --color=always | \
    grep -v '/HEAD\s' | \
    fzf -m --ansi --preview-window right:70% --preview 'git log --color=always --oneline --graph --date=short \
      --pretty="format:%C(auto)%cd %h%d %s %C(magenta)[%an]%Creset" \
      --print0 \
      --read0 \
      (echo {} | sed s/^..// | cut -d" " -f1) | head -'$LINES | \
    sed 's/^..//' | cut -d' ' -f1 | \
    sed 's#^remotes/##' | \
    # fzf_add_to_commandline | \
    fzf_checkout
end

function __git_fzf_git_tag
  __git_fzf_is_in_git_repo; or return
  git tag --sort -version:refname | \
    fzf -m --ansi --preview-window right:70% --preview 'git show --color=always {} | head -'$LINES | \
    fzf_add_to_commandline

end

function __git_fzf_git_log
  __git_fzf_is_in_git_repo; or return
  git log --color=always --graph --date=short --format="%C(auto)%cd %h%d %s %C(magenta)[%an]%Creset" | \
    fzf -m --ansi --reverse --preview 'git show --color=always (echo {} | grep -o "[a-f0-9]\{7,\}") | head -'$LINES | \
    sed -E 's/.*([a-f0-9]{7,}).*/\1/' | \
    fzf_add_to_commandline
end

# https://gist.github.com/junegunn/8b572b8d4b5eddd8b85e5f4d40f17236
function git_fzf_key_bindings -d "Set custom key bindings for git+fzf"
  bind \ca\cs __git_fzf_git_status
  bind \ca\cf __git_fzf_git_branch
  bind \ca\ct __git_fzf_git_tag
  bind \ca\cl __git_fzf_git_log
end

git_fzf_key_bindings
[–] [email protected] -2 points 4 months ago

advanced terminal
or
advanced tips and tricks
?