Linux Command Library
commands
Commands
basic
Basic
tips
Tips

cat

concatenate files and print on the standard output

- Print the contents of a file to the standard output:
cat [file]

- Concatenate several files into the target file:
cat [file1] [file2] > [target_file]

- Append several files into the target file:
cat [file1] [file2] >> [target_file]

- Number all output lines:
cat -n [file]

cat [,OPTION/]... [,FILE/]...

Concatenate FILE(s) to standard output.

With no FILE, or when FILE is -, read standard input.

-A, --show-all
equivalent to -vET
-b, --number-nonblank
number nonempty output lines, overrides -n
-e
equivalent to -vE
-E, --show-ends
display $ at end of each line
-n, --number
number all output lines
-s, --squeeze-blank
suppress repeated empty output lines
-t
equivalent to -vT
-T, --show-tabs
display TAB characters as ^I
-u
(ignored)
-v, --show-nonprinting
use ^ and M- notation, except for LFD and TAB
--help
display this help and exit
--version
output version information and exit

cat f - g
Output f's contents, then standard input, then g's contents.
cat
Copy standard input to standard output.

Written by Torbjorn Granlund and Richard M. Stallman.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cat translation bugs to <http://translationproject.org/team/>

Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

tac(1)

Full documentation at: <http://www.gnu.org/software/coreutils/cat> or available locally via: info '(coreutils) cat invocation'

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