hello all, i am trying to append some thing in some file. cat r1; out put 172.24.0.1 sed '10s/$/172.24.0.254/' file.txt i want replace 172.24.0.254 ip address by r1 out put. can we make r1 out put as sed command input?? -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list