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NixOS/Nix

• Show channels: sudo nix-channel --list
• add unstable channel: sudo nix-channel --add https://nixos.org/channels/nixpkgs-unstable unstable
• update repos: sudo nix-channel --update; sudo nix search -u

Vim

• Sort selected lines: :sort
• Open man page: :man [command] or \K
• Open URL: gx
• Move between splits: ctrl+w [direction]
• vim-commentary: gc [motion] to comment out
• Case switching:
  • gU to uppercase
  • gu to lowercase -g~ to toggle
• Substitute:
  • /g global - sub all in line
  • :%s/ - substitute in all lines
  • :5,12s/ substitute from lines 5 to 12
  • :.,+2s/ substitute this line (.) and the next 2
  • :g/^foo/s/bar/baz/g substitute all instances of bar with baz on lines beginning with foo
  • /c - ask for confirmation
• Windows
  • :sp [filename] horizontal split, optionally open file
  • vsp vertical split
  • ctrl+w w move between windows
  • ctrl+w = resize windows to be equal
  • ctrl+w q close window
  • ctrl+w <direction> move window

McFly

SSH

• Set up port forwarding in existing connection:

$ ~C
ssh> -D [port number]
[Enter]
[Enter]
$

Shell

• !!:s/foo/bar/, replace first instance of foo with bar in the previous command
• ^foo^bar same thing but shorter and less flexible
• !foo rerun last command containing foo