centos7差异于以往linux的把持，对开机自启动的调解，命令有所差异。

chkconfig

--list查看非体系内置处事的自启动状态

[root@vd13crmtb01 ~]# chkconfig --list

Note: This output shows SysV services only and does not include

native

systemd

services. SysV configuration data might be overridden by native

systemd

configuration.

If you

want to list systemd services use "systemctl list-unit-files".

To see

services enabled on particular target use

"systemctl list-dependencies [target]".

iprdump  0:off  1:off

2:on  3:on

4:on  5:on  6:off

iprinit  0:off  1:off

2:on  3:on

4:on  5:on  6:off

iprupdate  0:off  1:off

2:on  3:on

4:on  5:on  6:off

netconsole  0:off  1:off  2:off  3:off  4:off

5:off  6:off

network  0:off  1:off

2:on  3:on

4:on  5:on  6:off

vmware-tools  0:off

1:off  2:on  3:on  4:on

5:on  6:off

按照提醒，要查看体系内置的处事自启动状态需要使用命令systemctl

list-unit-files，它会列出体系所有内置处事的自启动状态。

所以调解ntp的自启动需要在这里调解。

[root@vd13crmtb01 ~]# systemctl enable ntpd.service

//开机自启动

调解以后重启体系，可是收现ntp并出有启动起来

[root@vd13crmtb01 ~]# pgrep ntpd  //无法查看到相关进程

[root@vd13crmtb01 ~]# systemctl status ntpd

ntpd.service - Network Time Service

Loaded: loaded

(/usr/lib/systemd/system/ntpd.service; enabled)

Active: inactive (dead)

//闪现开机自启动了，但是状态是inactive

经过查询收现有一个chronyd处事设置为开机自启动，这个处事招致ntp无法开启自启动

[root@vd13crmtb01 ~]# systemctl status chronyd

chronyd.service - NTP client/server

Loaded: loaded

(/usr/lib/systemd/system/chronyd.service; enabled)

Active: inactive (dead)

since Tue 2014-11-11 08:28:14 CST; 1min 45s ago

Main PID: 3033 (code=exited,

status=0/SUCCESS)

CGroup:

/system.slice/chronyd.service

Nov 11 08:06:31 vd13crmtb01.zj.chinamobile.com systemd[1]:

Starting NTP clien...

Nov 11 08:06:31 vd13crmtb01.zj.chinamobile.com chronyd[3033]:

chronyd version...

Nov 11 08:06:31 vd13crmtb01.zj.chinamobile.com chronyd[3033]:

Linux kernel ma...

Nov 11 08:06:31 vd13crmtb01.zj.chinamobile.com chronyd[3033]:

hz=100 shift_hz...

Nov 11 08:06:31 vd13crmtb01.zj.chinamobile.com systemd[1]:

Started NTP client...

Nov 11 08:28:14 vd13crmtb01.zj.chinamobile.com systemd[1]:

Stopping NTP clien...

Nov 11 08:28:14 vd13crmtb01.zj.chinamobile.com systemd[1]:

Stopped NTP client...

Hint: Some lines were ellipsized, use -l to show in full.

经过禁行chronyd处事开机自启动以后再将体系重启

[root@vd13crmtb01 ~]# systemctl disable

chronyd.service

rm

"/etc/systemd/system/multi-user.target.wants/chronyd.service"

[root@vd13crmtb01 ~]# pgrep ntpd

2981

[root@vd13crmtb01 ~]# ntpq -p

remote

refid  st t when poll reach

delay  offset

jitter

==============================================================================

10.70.213.132  10.70.91.148

3 u  21

64  1

1.252  0.029  0.000

*10.70.213.133  10.70.91.148

3 u  21

64  1

1.139  -0.191  0.000

此时，NTP的处事已经开机自启动了，完成！

本文出自 “Kaerser”

专客，请务必保存此出处http://3699524.blog.51cto.com/3689524/1575198