Ubuntu systems use sysv-rc-conf to start daemons under each run level

In http://www.aliyun.com/zixun/aggregation/33836.html ">debian/ubuntu Linux, the UPDATE-RC.D command replaces Chkconfig as the default edit/etc/ INIT.D a script-linked package. Unfortunately, the tool is used primarily for editing service links that are currently installed or removed, while the editing of links to existing packages is poorly supported.

Fortunately, however, the packet sysv-rc-conf, which is almost consistent with the chkconfig syntax, brings hope to the distressed administrator that you can start its GUI mode by executing its parameterless command. This section will show you some important tips for using sysv-rc-conf.

Install sysv-rc-conf

SYSV-RC-CONF packages can be installed through apt. as follows:

root@u-bigboy:~# Apt Install sysv-rc-conf

List The running levels of the daemon

This can be done by adding the--list option. In the example below we will list the level of operation of the Apache daemon.

root@u-bigboy:~# sysv-rc-conf--list apacheapache 0:off 1:off 2:on 3:on 4:on 5:on 6:offroot@u-bigboy:~#

Let's take a look at the run level of all daemons.

root@u-bigboy:~# sysv-rc-conf --listacpi-support 0:off 1:off 2:on 3:on 4:on 5:on 6:offacpid 0:off 1:off 2:on 3:on 4:on 5:on 6 : Offalsa-utils 0:off 6:off.........vbesave 2:on 3:on 4:on 5:onx11-common s:onroot@u-bigboy:~#

Set the run level of the daemon

Sysv-rc-conf is very similar to the chkconfig syntax. Let's set the Apache daemon to start automatically at run Level 2 to 5.

root@u-bigboy:~# sysv-rc-conf Apache on

Again, we can set Apache at run Level 2 through 5 with the following command:

root@u-bigboy:~# sysv-rc-conf Apache off

Finally, we set Apache to start only at run Level 3 and 5.

root@u-bigboy:~# sysv-rc-conf--level Apache on