#!/bin/bash s='# Example: Server=127.0.0.1,192.168.1.0/24,::1,2001:db8::/32,zabbix.example.com Server=127.0.0.1' sed 's/^Server=127\.0\.0\.1/Server=zabbix.mydomain.com/g' <<< "$s"
Standard input is empty
# Example: Server=127.0.0.1,192.168.1.0/24,::1,2001:db8::/32,zabbix.example.com Server=zabbix.mydomain.com