sed -i 's/server 0.centos.pool.ntp.org iburst/#server 0.centos.pool.ntp.org iburst/g' "$config_path" sed -i 's/server 1.centos.pool.ntp.org iburst/#server 0.centos.pool.ntp.org iburst/g' "$config_path" sed -i 's/server 2.centos.pool.ntp.org iburst/#server 0.centos.po...