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I have a script that I want to run at startup and on shutdown.

I have placed the file in /etc/init.d and named it testscript.sh

Then I changed permissions sudo chmod 755 testscript.sh

Then I made link ln -s /etc/init.d/testscript.sh /etc/rc2.d/S99testscript.sh

So far so good, now the script runs at startup. I tried doing the same but making the links in rc0.d and rc6.d but that didn't work, the script still won't run at reboot/shutdown.

What am I doing wrong?

I'm running Ubuntu on putty client.

marked as duplicate by Jeff Schaller, GAD3R, Wildcard, Eric Renouf, countermode Mar 15 '17 at 7:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 1
    Try renaming your script to K99testscript.sh. S stands for start scripts, thus they are run when system starts, K stands for kill scripts, thus they are run when system is shut down. Also I would recommend to create Systemd unit files (if you are using new version of Ubuntu) rather than SysV scripts. – NarūnasK Mar 10 '17 at 21:45
  • That didn't work. I've also noted that the files in rc0.d and rc6.d are shown i red while the linked file in rc2.d are shown is sky blue. Does that have something to do with it? As I understand, the linked files should be shown i sky blue and archived files in red? – Ribban Mar 10 '17 at 22:39
  • A link showing as red (depending on what kind of red) is generally a broken link (i. e. a link that is not in fact pointing to a file or directory that actually exists). You can demonstrate this for yourself with ln -s /nosuchpath ./broken-link; ls -l ./broken-link; rm ./broken-link. – DopeGhoti Mar 10 '17 at 23:17
  • 2
    What you are doing wrong is not telling people in the question what version of Ubuntu this is. Ubuntu has not used the rc system that you are fiddling with since 2006. For over a decade it has only supported what you are playing with using two distinct sets of backwards-compatibility shims. If you are new to this stuff, and using an Ubuntu version from the past decade or so, then do not begin with rc scripts at all. – JdeBP Mar 11 '17 at 9:23
  • I'm running Ubuntu 16.04.2. I have tried putting symlinks in all rc*.d dircetorys but still no startup or shutdown script. I have followed the instructions written by NarunasK. I have do it this way, it's part of a lab assignment. – Ribban Mar 11 '17 at 21:05

Put your script into the /etc/init.d directory.

Set up executable bit: sudo chmod +x /etc/init.d/your_script.sh

Check what's your runlevel:

# runlevel
N 5

Create Start symlink in the appropriate runlevel dir. (5):

sudo ln -s /etc/init.d/your_script.sh /etc/rc5.d/Syour_script.sh

Create Kill symlink in the shutdown runlevel dir. (0):

sudo ln -s /etc/init.d/your_script.sh /etc/rc0.d/Kyour_script.sh

To do it properly read here.

  • If I remember correctly, the program update-rc.d was used for ubuntu to create those symlinks for SysVinit. – Michael D. Mar 11 '17 at 1:02

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