Question

1

how to remove a service that not be enabled after reboot?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 3399 / 2 Years ago, sun, september 18, 2022, 4:15:23

I want to remove unnecessary services in Ubuntu server 13.04 for hardening purpose.
I don't know use which blow command for dedicate services:
1. inintct list
2. sysv-rc-conf list
3. ls /etc/init.d
4. service --status-all

why outputs of each above command are different?
I tried stop atd service with "service atd stop", but after reboot system this
service start again.
Since I want hardening my server, how to disable a service permanently?
and which services should be disable?

Thanks.

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

measord

Add To Favorites

Follow

Total Points: 259

Total Questions: 131

Total Answers: 106

Location: Venezuela

Member since Sun, Oct 2, 2022

2 Years ago

measord questions

1 Lantern failed to set as system proxy

Wed, Jul 14, 21, 21:39, 3 Years ago

1 Enabling RDP sharing

Mon, May 16, 22, 21:12, 2 Years ago

1 Installing docker, getting: `PreDepends: init-system-helpers (>= 1.54~) but 1.51 is to be installed`

Wed, May 24, 23, 19:05, 1 Year ago

1 Viber No Connection on Ubuntu 22.04 even I have an internet

Mon, Oct 11, 21, 03:11, 3 Years ago

1 Switching Audio devices breaks optical audio output

Sun, Apr 17, 22, 21:22, 2 Years ago

View All

answered 2 Years ago tatoethin · Accepted Answer

/etc/init.d holds the start up/shut down scripts for various services, but they are actually invoked by the scripts in /etc/rc*.d.

The rc*.d scripts are actually hold symbolic links to /etc/init.d scripts, and the names in the rc*.d directories say whether to start or stop a service as you enter that run level - the number in the name gives the order in which to run the scripts.

So, for example, /etc/rc3.d/S23ntp says to start the ntp daemon at run level 3 (after all the lower numbered services have been started).

So - to stop a service running after a reboot, the best thing to do is manipulate the rc*.d scripts.

And the best way to do that is to use the update-rc.d command. e.g. to disable ntp at boot, run:

update-rc.d ntp disable

As to what services to disable - be careful that you understand what a service does and its purpose before disabling it.

I was going to give atd as an example - this is a process that uses very little resource, but stopping it may have unintended consequences.

But as it turns out, atd is actually invoked by a different mechanism (upstart) - and I don't have time to go in to that now!