Linux bash for loop

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

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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.

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I'm Vivek Gite, and I write about Linux, macOS, Unix, IT, programming, infosec, and open source. Subscribe to my RSS feed or email newsletter for updates.

1 comment… add one
  • Mosco Feb 10, 2012 @ 5:09

    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.

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