1、查看sendmail状态：# service sendmail statussendmailsendmail.service - LSB: start and stop sendmailLoaded: loaded (/etc/rc.d/init.d/se
1、查看sendmail状态：
# service sendmail status
sendmailsendmail.service - LSB: start and stop sendmail
Loaded: loaded (/etc/rc.d/init.d/sendmail)
Active: active (running) since Mon, 14 Jan 2013 11:30:09 +0800; 8min ago
Process: 1231 ExecStart=/etc/rc.d/init.d/sendmail start (code=exited, status=0/SUCCESS)
Main PID: 1410 (sendmail)
CGroup: name=systemd:/system/sendmail.service
├ 1410 sendmail: accepting connections
└ 1419 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
sm-clientsendmail.service - LSB: start and stop sendmail
Loaded: loaded (/etc/rc.d/init.d/sendmail)
Active: active (running) since Mon, 14 Jan 2013 11:30:09 +0800; 8min ago
Process: 1231 ExecStart=/etc/rc.d/init.d/sendmail start (code=exited, status=0/SUCCESS)
Main PID: 1410 (sendmail)
CGroup: name=systemd:/system/sendmail.service
├ 1410 sendmail: accepting connections
└ 1419 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
2、关闭sendmail，禁止开机启动：
# service sendmail stop
Shutting down sm-client: [OK]
Shutting down sendmail: [OK]
注：service命令虽然已经关掉了sendmial服务，但是在下次重新启动OS的时候，还是会随OS启动而启动。
# chkconfig --listsendmail
sendmail 0:off 1:off 2:on 3:on 4:on 5:on 6:off
可以看到在启动模式2/3/4/5都是默认启动的，全部禁止：
# chkconfig --level 2 sendmail off
# chkconfig --level 3 sendmail off
# chkconfig --level 4 sendmail off
# chkconfig --level 5 sendmail off
（以上命令可以用# chkconfig --levels 2345 sendmail off替代）
# chkconfig --list sendmail
sendmail 0:off 1:off 2:off 3:off 4:off 5:off 6:off
# setup
中sendmail前面[]中的*也没有了。
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