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Buffing up your Command Line skills

BASIC COMMANDS

  • man
  • pwd
  • ls -al
  • diff, vim -d
  • chmod
  • chown
  • cd
  • mv
  • cp /path/file.txt{,-old}
  • rm -rf
  • rmdir / mkdir
  • touch
  • tab complete
  • history | grep vim
  • clear
  • whoami
  • su, sudo
  • . and *

SOME MORE

VIM

  • u
  • i
  • o
  • esc
  • :wq!
  • x
  • d, dw, dd
  • D
  • highlight lines, then :!sort

REGEX

  • In vim: %s/lookingfor/whattomakeit/gc
  • At command line: sed
  • [abc] A single character of: a, b, or c
  • [^abc] Any single character except: a, b, or c
  • [a-z] Any single character in the range a-z
  • [a-zA-Z] Any single character in the range a-z or A-Z
  • ^ Start of line
  • $ End of line
  • \A Start of string
  • \z End of string
  • . Any single character
  • \s Any whitespace character
  • \S Any non-whitespace character
  • \d Any digit
  • \D Any non-digit
  • \w Any word character (letter, number, underscore)
  • \W Any non-word character
  • \b Any word boundary
  • (...) Capture everything enclosed
  • (a|b) a or b
  • a? Zero or one of a
  • a* Zero or more of a
  • a+ One or more of a
  • a{3} Exactly 3 of a
  • a{3,} 3 or more of a
  • a{3,6} Between 3 and 6 of a

Try It

FURTHER READING/EXPLORATION