With one-liners, you can:
  1. Edit previous command and re-execute quickly (Up arrow, edit, enter instead of Alt-Tab to Notepad2, edit, F2 or whatever, Ctrl-L). Okay, that's not much keystroke saving, but there's less windows/view switching.
  2. Utilize shell's tab completion to complete filenames, etc.
  3. Utilize shell's other features like brace expansion, environment variable expansion, etc.
  4. Pipe the output of script to other command; or receive other command's output as script's input.
  5. Easily redirect output of script to file.
  6. Store the previous commands in the shell history file.

Among others :-)

In reply to Re^2: beginners trap: one liner by perlancar
in thread solved: beginners trap: one liner by toohoo

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.