*nix configuration

Browser customization

• mozillaZine
• userChrome.org
• startpages/startpages.github.io - A curated list of startpages for your browser.
• Aris-t2/CustomCSSforFx - Custom CSS tweaks for Firefox Quantum.
• Timvde/UserChrome-Tweaks - A community maintained repository of userChrome.css tweaks for Firefox.
• MrOtherGuy/firefox-csshacks - Collection of userstyles affecting the browser.

Software alternatives

• OpenPGP.org/software
• ArchWiki
• Gentoo Wiki
• Debian Wiki
• suckless.org - Software that sucks less.
  • Stuff that sucks - Software with ideas against the suckless philosophy.
  • Stuff that rocks - Software with ideas similar to the suckless philosophy.
• GNU Recommendations
• Free Software Foundation
• DistroWatch
• Pacman/Rosetta
• InstallGentoo Wiki
• opensource.com
• List of applications - ArchWiki
• AlternativeTo - Crowdsourced software recommendations.
• Encyclopedia of things considered harmful
• freedesktop.org
• SourceForge
• List.community - An easy way to browse curated lists on GitHub.
• Slant - Choose the best.
• Luke Smith's Programs and Equipments
• LARBS—Luke's Auto-Rice Bootstrapping Scripts

Learning

• Linux
  • Linux.com - Resource for open source professionals to learn about the latest in Linux and open source technology.
  • HowtoForge - Linux tutorials.
  • tldp.org - The Linux Documentation Project.
  • linux.die.net - Linux documentation.
  • Ubuntu Manpage
  • LWN.net - News from the source.
  • kernel.org - The Linux Kernel Archives.
  • Linux Journal discontinued
• Vim
  • VimDocs
  • Vim Tips Wiki
  • Vimcasts.org - Vim screencasts.
  • Best of Vim Tips by ZZapper
  • Derek Wyatt's Vim Videos
  • Vim.zeef.com
  • vi-vim-cheat-sheet.gif (GIF Image, 1024 × 724 pixels)
  • Vim Adventures - Learn VIM while playing a game.
• Emacs
  • Emacswiki
  • GNU Emacs Reference Card - GNU Emacs Reference Card
• Bash
  • Bash Reference Manual
  • Bash Hackers Wiki
• Zsh
  • ZSH Tips by ZZapper
  • ZSH-LOVERS(1)
  • ZSH refcard
• Tmux
  • Tmux Cheat Sheet & Quick Reference
• Window managers
  • The Obscure Window Manager Project (DistroTube)
• Crontab.guru - An easy to use editor for crontab schedules.
• ip command cheatsheet for Red Hat Enterprise Linux

Dotfiles

• GitHub Search "dotfiles"
• Dotfiles - ArchWiki
• dotfiles.github.io - Your unofficial guide to dotfiles on GitHub.
• webpro/awesome-dotfiles - A curated list of dotfiles resources.
• thoughtbot/dotfiles - A set of vim, zsh, git, and tmux configuration files.
• tpope/dotfiles - tpope's dotfiles. DON'T USE unless you're tpope
• LukeSmithxyz/voidrice - Luke Smith's Dotfiles.
• thoughtstream/Damian-Conway-s-Vim-Setup
• holman/dotfiles - Zach Holman's Dotfiles.
• mathiasbynens/dotfiles - Mathias Bynen's Dotfiles.
• jessfraz/dotfiles - Jess Frazelle's Dotfiles.
• wincent/wincent - Greg Hurrell's Dotfiles.
• ornicar/dotfiles - My beloved Linux dot files for zsh, tmux, git, tig, vim, mpd, mutt, rtorrent, weechat, xmonad, urxvt, vimperator, ranger...
• dwt1/dotfiles - Distrotube's Dotfiles