Linux CentOS7.0 (systemctl) vs Chkconfig, Service

There is no service command in CentOS 7.0, but the SYSTEMCTL server command is enabled

Systemctl is a System Service Manager command that actually combines the two commands, service and chkconfig.

Such as:

Centos7 after installation, starting the service and shutting down the service is not the same as previous service Stop/start xxxx.

See all NIC IP addresses--ip addr

Start firewall--systemctl start Firewalld.service

Stop firewall--systemctl Stop Firewalld.service

View FIREWALLD firewall status--firewall-cmd--state

Disable firewall boot--systemctl disable Firewalld.service

Lists the running service status--systemctl

Start a service-- systemctl start postfix.service

关闭一个服务——systemctl stop postfix.service

Restart a service:--systemctl restart postfix.service

Show the status of a service--systemctl status postfix.service

在开机时启用一个服务——systemctl enable postfix.service

Disable a service at boot-systemctl disable postfix.service

查看服务是否开机启动——systemctl is-enabled postfix.service;echo $?

查看已启动的服务列表——systemctl list-unit-files|grep enabled

设置系统默认启动运行级别3——ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target

设置系统默认启动运行级别5——ln -sf/lib/systemd/system/graphical.target/etc/systemd/system/default.target

原文地址：http://www.centoscn.com/CentOS/help/2015/0618/5687.html

Linux CentOS7.0 (systemctl) vs Chkconfig, Service