service

service 功能说明： 管理系统服务
该命令在CentOS 7 里被systemctl取代。

语法格式：  service [服务名] [执行命令]
执行命令包括： start, stop, restart, try-restart, reload, force-reload, status 等

停止服务：      service crond stop
启动服务：      service crond start
重启服务：      service crond restart
查看服务状态：  service crond status

说明：在工作中推荐使用/etc/init.d/crond 这种格式管理服务，因为有tab键补全
/etc/init.d/crond stop
/etc/init.d/crond start
/etc/init.d/crond restart
/etc/init.d/crond status

参数选项：
--status-all  显示所有服务状态


范例：查看当前服务状态
[root@testdb62 ~]# service --status-all
clickhouse-server service is stopped
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: http://www.elastic.co

10月 13 17:12:21 testdb62 systemd[1]: Starting Elasticsearch...
10月 13 17:12:22 testdb62 elasticsearch[3281]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSw...se.
10月 13 17:12:31 testdb62 systemd[1]: Started Elasticsearch.
10月 14 15:26:05 testdb62 systemd[1]: Stopping Elasticsearch...
10月 14 15:26:05 testdb62 systemd[1]: Stopped Elasticsearch.
10月 14 15:26:05 testdb62 systemd[1]: Starting Elasticsearch...
10月 14 15:26:06 testdb62 elasticsearch[5900]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSw...se.
10月 14 15:26:15 testdb62 systemd[1]: Started Elasticsearch.
10月 15 14:09:21 testdb62 systemd[1]: Stopping Elasticsearch...
10月 15 14:09:21 testdb62 systemd[1]: Stopped Elasticsearch.
Hint: Some lines were ellipsized, use -l to show in full.
guacd is not running.
Checking jexec status● keepalived.service - SYSV: Start and stop Keepalived
   Loaded: loaded (/etc/rc.d/init.d/keepalived; bad; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)
Usage: /etc/init.d/mhavip {start|stop}
 SUCCESS! MySQL running (15354)
未加载 netconsole 模块
已配置设备：
lo ens160
当前活跃设备：
lo ens160
Usage: /etc/init.d/realserver {start|stop}
Redis is not running