[root@db init.d]# service [service name] (start|stop|restart|status|...)
service name：就是服務名，需與/etc/init.d/目錄下面的應用程序對應。
--顯示出目前系統上面所有服務的運行狀態
- [root@db init.d]# service --status-all
- acpid (pid 1900) is running...
- anacron is stopped
- atd (pid 2205) is running...
- auditd (pid 1617) is running...
- automount (pid 1989) is running...
- Avahi daemon is running
- Avahi DNS daemon is not running
- hcid (pid 1811) is running...
- sdpd (pid 1817) is running...
- capi not installed - No such file or directory (2)
- conmand is stopped
- cpuspeed is stopped
- crond (pid 2138) is running...
- cupsd (pid 2058) is running...
- ... ...
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netstat -[atunlp]
-a 將目前系統上所有的連接、監聽、Socket數據都列出來；
-t 列出tcp網絡數據包的數據；
-u 列出udp網絡數據包的數據；
-n 不列出進程的服務名稱，以端口號來顯示；
-l 列出目前正在網絡堅挺的服務；
-p 列出該網絡服務的進程PID。
例如：
- [root@linux ~]# netstat -anp | grep 1521
- tcp 0 0 0.0.0.0:1521 0.0.0.0:* LISTEN 2542/tnslsnr
- tcp 0 0 127.0.0.1:31115 127.0.0.1:1521 ESTABLISHED 2550/ora_pmon_orcl
- tcp 0 0 127.0.0.1:1521 127.0.0.1:31115 ESTABLISHED 2542/tnslsnr
- [root@linux ~]# netstat -an | grep 1521
- tcp 0 0 0.0.0.0:1521 0.0.0.0:* LISTEN
- tcp 0 0 127.0.0.1:31115 127.0.0.1:1521 ESTABLISHED
- tcp 0 0 127.0.0.1:1521 127.0.0.1:31115 ESTABLISHED
