Linux bash for loop

in Categories , 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
   echo $variable

To loop through all files in a directory, enter:

for file in *
   echo $file

To print number 1 to 10, enter:

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

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

for n in {1..10}
   out=$(( $n % 2 ))
   if [ $out -eq 0 ] 
	echo "$n is even number"
	echo "$n is ODD number"	

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+.

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