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This article mainly introduces how to use undate-rc.d in Debian, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Debian's update-rc.d is similar to RH's chkconfig tool. However, chkconfig is a binary program, and update-rc.d is a Perl script. These tools have different command-line options, but perform similar functions.

Command function

Update-rc.d-f remove removes the specified service from all runlevel configuration directories

The update-rc.d start configuration service starts in the specified order in the runlevel list

The update-rc.d stop configuration service stops in the order specified in the runlevel list

The biggest difference between update-rc.d and RH's chkconfig is that update-rc.d is a run-level link to the service script in the / etc/init.d directory, while chkconfig is to configure the service separately for each run-level. In essence, this means that every time we use update-rc.d to change one runlevel, we have to change everything. For example, the following command sequence has the same effect as the command chkconfig-level 2345 inetd off:

$update-rc.d-f inetd remove

$update-rc.d inetd stop 20 0 1 2 3 4 5 6.

The first command removes all run-level links to the / etc/init.d/inetd service script, and the-f flag will cause update-rc.d to handle even if the inetd script itself already exists. The second command creates a stop script with a service level of 20 at each run level. For example, this creates a symbolic link to / etc/rc3.d/K20inetd to disable inetd in runlevel 3. What we need to notice here is that we want to display the add reboot and shutdown runlevels, that is, 0 and 6, even though all of the services will be set to "stop". As another example, the command shown below will allow inetd to run at run levels 3 to 5, while it will be disabled at other run levels:

$update-rc.d-f inetd remove

$update-rc.d inetd start 20 3 4 5. Stop 20 0 1 2 6.

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