On Tue, Jun 7, 2016 at 5:33 PM, Kenneth Porter <shiva at sewingwitch.com> wrote: > On 6/3/2016 10:41 PM, Indunil Jayasooriya wrote: > >> I need a OUTPUT like this >> >> >> *firstname1 lastname1firstname2 lastname2* >> > > An obvious solution is to use Perl. I suggest searching Stackoverflow for > a solution using that language. > yeah, you are right. http://stackoverflow.com/questions/18909957/how-to-use-bash-script-to-loop-through-two-files #!/bin/bash paste file_in.txt file_out.txt | while read if of; do echo "-in $if -out $of" done my example. [root at centos67 loop]# cat file1 firstname1 firstname2 [root at centos67 loop]# cat file2 lastname1 lastname2 [root at centos67 loop]# paste file1 file2 | while read if of; do echo "$ if at example.com $of at example.com"; done firstname1 at example.com lastname1 at example.com firstname2 at example.com lastname2 at example.com thanks for your mail.