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2

How do I start certain services only when needed?

rated 0 times [ 2] [ 0] / answers: 1 / hits: 664 / 3 Years ago, sun, october 17, 2021, 7:52:17

I have a laptop. I use it for web+email a lot, and then some days for web development. Using it for the latter, I need apache2 and mysql server running, but normally I do not.

I'd like a normal boot to NOT start apache and mysql, to conserve power, reduce boot times etc. but then to be able to start these services when needed.

In the olden days I might have used runlevels for this, but that's a bit old skool now, as I understand. What's the best way to achieve this in Precise?

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tersle

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2 Years ago

answered 3 Years ago cocal · Accepted Answer

A way to do it with good ol' runlevels:

MySQL now uses an upstart script, but inside that it's still talking about runlevels. Edit /etc/init/mysql.conf and change lines as in this diff:

-start on runlevel [2345]

-stop on starting rc RUNLEVEL=[016]

+start on runlevel [345]

+stop on starting rc RUNLEVEL=[0126]

Apache2 still uses runlevel rc.N.d sym links:

sudo update-rc.d -f apache2 remove 

sudo update-rc.d apache2  start 91 3 4 5 . stop 09 0 1 6 .

Then on a normal boot (runlevel 2), they won't be started, and when you do sudo telinit 3, they will.