Linux bash for loop

January 13, 2008December 13, 2008in BASH Shell, Linux last updated December 13, 2008

Q. How do I use bash for loop under Linux operating systems?

A. for loop is used to process group of files or for other automation purposes.

Linux bash for loop syntax

for variable in list
do
   echo $variable
done

To loop through all files in a directory, enter:

for file in *
do
   echo $file
done

To print number 1 to 10, enter:

for n in {1..10}
do
   echo $n
done

Shell script to print odd and even number using a for loop

#!/bin/bash
for n in {1..10}
do
   out=$(( $n % 2 ))
   if [ $out -eq 0 ] 
   then
	echo "$n is even number"
   else
	echo "$n is ODD number"	
   fi	
done

See more bash for loop examples here.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

1 comment

Mosco says:
February 10, 2012 at 5:09 am
My Epson CX3810 works out of the box with no fuss, that is the ptnerir and the scanner part.. Faxing should also work, tho I have not tried it. I recently moved the ptnerir to an Ubuntu home and shared it out and I can to it on my Linux boxes and Windows and even my old Mac PPC G4 tower running OS 10.5.. Of course the Windows (XP/Vista and 7) all needed drivers and so did the Mac..Just in case anyone wanted to know.
Reply Report comment

nixCraft