Hello fellow nixers,

In this thread we'll share our favorite cheat sheets, reference cards, and maybe even useful one liners.

You can also ask other members to create cheat sheets or reference cards or simplified summarized schemas wishlists, or create one yourself.

Here's a good list:

• GDB: https://darkdust.net/files/GDB%20Cheat%20Sheet.pdf https://users.ece.utexas.edu/~adnan/gdb-refcard.pdf
  
• SMTP: https://www.bsdcan.org/2016/schedule/att...tsheet.pdf
  
• linux perf: https://jvns.ca/blog/2017/12/27/a-perf-cheat-sheet/
  
• udev: http://lhermie.net/udev-cheat-sheet/
  
• Big O notation: http://bigocheatsheet.com/
  
• Lots of other cheat sheets: http://www.cheat-sheets.org/ https://github.com/Stickano/ArchCheatSheet
  
• Bash one liners: http://www.bashoneliners.com/
  
• vim one liners: http://zzapper.co.uk/vimtips.html
  
• Perl one liners: http://www.catonmat.net/download/perl1line.txt
  
• Awk one liners: http://www.pement.org/awk/awk1line.txt
  
• sed one liners: http://pement.org/sed/sed1line.txt
  

My wishlist would be to have a cheatsheet for desktop entries and default programs. Something that would cover XDG utilities too, mimeopen and all mime things and desktop entries manipulation.

I may try to compile this list myself if no one wants to join in. Or maybe we should put all our cheat sheets in a common repository in the Github user group.

Let's get ideas rolling.