less is a pager

that means it lets you view (not edit) text files.

man uses your pager (usually less) to display man pages

many vim shortcuts work in less

• / search
• n/N next/prev match
• j/k down / up a line
• m/' mark/return to line
• g(gg in vim)/G beginning /end of file

less -r

displays bash escape codes as colours

try ls --color | less -r

with -r:

• a.txt
• a.txt.gz (red, bold)

without -r

• a.txt
  ESCLOM ESC C01;31ma.txt.gz ESCCOM
  (ugh)

or piped in text

q

quit (smiley face)

v (lowercase)

edit file in your $EDITOR

arrow keys, Home / End, PgUp, Pg Dn work in less

F

press F to keep reading from the file as it’s updated (like tail -f)

press Ctrl+C to stop reading updates

+

+ runs a command when less starts

• less +F : follow updates
• less +G: start at end of file
• less +20%: start 20% into file
• less +/foo: search for ‘foo’ right away