Reference

Commonly used UniCode symbols

• You can find more in Solaria's Symbols

• Click on the buttons to copy them to the clipboard.
• Emojis are UniCode too. ☺
• How to write UniCode with the ID's
• The Unicode itself: From U+2660 to U+00002660 (♠ in Hexadecimal)
• In HTML: ♠ (Entity) // ⋜ (Decimal) // ♠ (Hexadecimal)
• In CSS: '\2660' (Hexadecimal)
• Keycombos for typing them in if you know the hexadecimal Unicode code:
• For Linux:
1. Press and hold the left Ctrl and Shift keys
2. Type U
3. Type in the hexadecimal codepoint sequence, e.g. 1 F 6 0 0 for 😀.
4. Release Ctrl and Shift
• For Windows

Misc.

• A quick explanation of 'bg', 'fg' and 'jobs'
• Linux: Making programs run in the console without it being tied to it

  If you just want to use the terminal interactively again, run the command in the background by appending & after the command:

  some_command &

  If you want the application to continue functioning after closing the terminal as well, use nohup:

  nohup some_command &

  All STDOUT and STDERR will be redirected to the file $PWD/nohup.out.

  Or disown:

  some_command & disown

  Both nohup and disown will make some_command immune to SIGHUP.

  Check man nohup and help disown to get more idea on these.

  heemayl on Stack Exchange
• Root folders of Linux explainedI keep forgetting most of the things here, so, since I can add a comment to any folder on my system, I've gotten the idea that I could add a little summary of what each folder is for so I can quickly reference the comment in the future!
• Wikipedia article on dashes (how to use en-/em-dashes and horizontal bars properly)