Friday, December 4, 2009

Use tab newline with echo command - bash



$ echo "HMM\tThis line got a TAB"
HMM\tThis line got a TAB

So it did not work !

To use tabs, new-line, and other formatting characters with UNIX/Linux echo command, specify the -e option:

$ echo -e "HMM\tThis line got a TAB"
HMM This line got a TAB

Similarly:

$ echo -e "A B\nC\nD"
A B
C
D

From ECHO(1) man page:

-e enable interpretation of backslash escapes

If -e is in effect, the following sequences are recognized:


\\ backslash

\a alert (BEL)

\b backspace

\c suppress trailing newline

\f form feed

\n new line

\r carriage return

\t horizontal tab

\v vertical tab


Similar posts:

- Grep and print control characters in a file - UNIX
- Highlight match with color in UNIX grep command
- Print only matched string, not line in grep command

1 comment:

Birru Srinivas said...

Very good.
Excellent presentation.
Easy way of understanding.

© Jadu Saikia www.UNIXCL.com