New Shell, who dis?

My first steps when working on a new machine / environment

Bash

First and foremost, we want to add a few things in our .bashrc

• set -o vi for a more vim-like experience

Aliases

Additionally, here’s a group of clever aliases you can copy-pate.

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alias \
	v=vim \
	sv="sudo vim" \
	g=git \
	gl="git log" \
	df="df -h" \
	du="du -h --max-depth=1"

I’m a big fan of colors, so let’s add those as well.

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alias \
	grep="grep --color=auto" \
	diff="diff --color=auto" \
	ip="ip -color=auto"

Vim

After configuring the most important program, the shell, we configure the second, vim. Below are a list of useful configs and mappings.

• Syntax highlighting in vim
  • Add syntax on to your .vimrc
• Show line numbers, and relative line numbers
  • set number relativenumber
• Enable auto-complete
  • set wildmode=longest,list,full
• Search and replace easily by hitting S in normal mode
  • nnoremap S :%s//g<Left><Left>
  • Search and replace syntax is as follows:
    • :%s/find/replace/g
  • It’s also responsive to RegEx, which I will elaborate upon in my upcoming RegEx tutorial
• Save screen real-estate with smaller tabs
  • set shiftwidth=4
  • set tabstop=4
• Aliases for fast fingers
  • command WQ wq
  • command Wq wq
  • command W w
  • command Q q
  • These make it such that if you enter any variation of :wq, it’ll know what you want
• These commands and bindings make it easy to open terminals
  • command Vterm :vsp | :terminal
  • command Hterm :sp | :terminal
  • map <C-t> :Vterm<CR>i
  • map <C-g> :Hterm<CR>i

Split Screen

Split screening in vim allows you to edit multiple files at once. You can open a horizontal split with CTRL-W s (That means hitting control and w at the same time, then s) or a vertical slip with CTRL-W v

Navigating between splits in vim involves hitting CTRL-W plus a movement key (h, j, k, or l), but we are going to simplify it with the following bindings

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map <C-h> <C-w>h
map <C-j> <C-w>j
map <C-k> <C-w>k
map <C-l> <C-w>l

This allows you to navigate between splits with CTRL-H, CTRL-J, CTRL-K, and CTRL-L, which move you left, down, up, and right respectively.

Folding

Folding allows you to collapse sections of code based off of syntax. This is something I recently discovered and I’m a big fan of it.

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set foldmethod=syntax
set foldlevelstart=1

To use folding, you can always open up the help menu with :help fold-commands but below is a summary of key bindings in normal mode.

• zo: Open fold under cursor
• zc: Close fold under cursor
• zR: Open all folds
• zM: Close all folds
• zX: Reset folds