#!/bin/bash s="lbsrv_standards-d lbsrv_standards-t lbsrv_standards" awk '{a=$0; sub(/^lbsrv/, "lb", a); print "rename "$0" "a }' <<< "$s"
Standard input is empty
rename lbsrv_standards-d lb_standards-d rename lbsrv_standards-t lb_standards-t rename lbsrv_standards lb_standards