Useful Commands

  less | vi | mail | tar | zip | dd | screen | find | Miscellaneous

less

  The less command displays a text document on the console. It is present on most
  installation.
# less unixtoolbox.xhtml

  Some important commands are (^N stands for [control]-[N]):
    * h H       good help on display
    * f ^F ^V SPACE       Forward one window (or N lines).
    * b ^B ESC-v       Backward one window (or N lines).
    * F       Forward forever; like "tail -f".
    * /pattern       Search forward for (N-th) matching line.
    * ?pattern       Search backward for (N-th) matching line.
    * n       Repeat previous search (for N-th occurrence).
    * N       Repeat previous search in reverse direction.
    * q       quit

vi

  Vi is present on ANY Linux/Unix installation (not gentoo?) and it is therefore useful to
  know some basic commands. There are two modes: command mode and insertion mode. The
  commands mode is accessed with [ESC], the insertion mode with i. Use : help if you are
  lost.
  The editors nano and pico are usually available too and are easier (IMHO) to use.

Quit

    * :w newfilename       save the file to newfilename
    * :wq or :x       save and quit
    * :q!       quit without saving

Search and move

    * /string       Search forward for string
    * ?string       Search back for string
    * n       Search for next instance of string
    * N       Search for previous instance of string
    * {       Move a paragraph back
    * }       Move a paragraph forward
    * 1G       Move to the first line of the file
    * nG       Move to the n th line of the file
    * G       Move to the last line of the file
    * :%s/OLD/NEW/g       Search and replace every occurrence

Delete copy paste text

    * dd (dw)       Cut current line (word)
    * D       Cut to the end of the line
    * x       Delete (cut) character
    * yy (yw)       Copy line (word) after cursor
    * P       Paste after cursor
    * u       Undo last modification
    * U       Undo all changes to current line

mail

  The mail command is a basic application to read and send email, it is usually installed. To
  send an email simply type "mail user@domain". The first line is the subject, then the mail
  content. Terminate and send the email with a single dot (.) in a new line. Example:
# mail [email protected]
Subject: Your text is full of typos
"For a moment, nothing happened. Then, after a second or so,
nothing continued to happen."

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