shell删除空行

[root@ansible-master ansible]# grep -v '^#' ansible.cfg |sed  -e  '/^$/d'
[defaults]
[privilege_escalation]
[paramiko_connection]
[ssh_connection]
[persistent_connection]
connect_timeout = 30
connect_retries = 30
connect_interval = 1
[accelerate]
[selinux]
[colors]
[diff]