Nifty little commands to remember

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All content on one page (useful for printing, presentation mode etc.)

1. Pager
2. Free memory
3. Set time (BIOS)
4. Set time (NTP)
   1. Set time with permanent Internet connection
   2. Set time with sporadic Internet connection
5. How to control console features such as the screensaver
6. Search administrative database
7. Disable sound (beep)
8. Error messages on the console screen
9. Set console to the correct type
10. Get the console back to a sane state
11. Convert a text file from DOS to Unix style
12. Convert a text file with recode
13. Regular-expression substitution
14. Edit a file in place using a script
15. Extract differences and merge updates for source files
16. Convert a large file into small files
17. Extract data from text file table
18. Script snippets for piping commands
19. Script snippets for looping over each file
20. Perl short script madness
21. Get text or a mailing list archive from a web page
22. Pretty print a web page
23. Pretty print a manual page
24. Merge two PostScript or PDF files
25. Time a command
26. nice command
27. Schedule activity (cron, at)
28. Console switching with screen
    1. Remote access scenario
    2. Typical screen commands
    3. Backspace and/or Ctrl-H in screen session
    4. Equivalent program to screen for X
29. Network testing basics
30. Flush mail from local spool
31. Remove frozen mail from local spool
32. Redeliver mbox contents
33. Clear file contents
34. Dummy files
35. chroot
    1. Run a different Debian distribution with chroot
    2. Setting up login for chroot
    3. Setting up X for chroot
    4. Run other distributions with chroot
    5. Build a package with chroot
36. How to check hard links
37. mount hard disk image file
38. Samba
39. Utilities for foreign filesystems

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