Fedora 16: 服务

服务的启动，停止都通过systemctl来完成

• 查看包含Network的服务

systemctl | grep Network

得到

sys-devi...et-eth0.device loaded active plugged       82577LC Gigabit Network Connection
NetworkManager.service    loaded active running       Network Manager
network.target            loaded active active        Network

• 停止

systemctl stop NetworkManager.service

• 还有status，reload，start等，具体可-h

• 开机启动

systemctl enable NetworkManager.service

service启动时间

• systemd-analyze blame

returns a list of various services launched at boot and the time it took to launch them and do their thing in milliseconds.

• systemd-analyze plot > plot.svg

creates a graphic plot of the latest boot in SVG format.

• systemctl stop SERVICENAME.service and systemctl disable SERVICENAME.service

stop a running service and disable it at boot respectively.

fedora 15的服务自动启动

以mysqld为例

1. 确保/etc/rc.d/init.d/mysqld 存在，用service mysqld start能够正常启动
2. 运行命令：chkconfig --add mysqld
3. 运行命令: chkconfig --level 345 mysqld on

• 启动的level含义

0:停机
1：单用户形式，只root进行维护
2：多用户，不能使用net file system
3：完全多用户
5：图形化
4：安全模式
6：重启

• chkconfig的用法

 chkconfig –list [name]
 chkconfig –add name
 chkconfig –del name
 chkconfig [--level levels] name <on|off|reset>
 chkconfig [--level levels] name