What happened to /etc/sysctl.conf in Kubuntu 25.04?

[JiriB]

New install on my laptop of Kubuntu 25.04 and went to edit /etc/sysctl.conf to configure swappiness and file no longer exist/empty. Where do I need to go to add my setting vm.swappiness=10? Thank you for your help.

[kapustin]

The file "/etc/sysctl.conf" no longer exists.

Set the swappiness to '10' with:

sudo sysctl vm.swappiness=10

Source

[kubicle]

/etc/sysctl.conf might still be read if you create it, but a "better" option would be to create a *.conf file in /etc/sysctl.d/ (for example "/etc/sysctl.d/90-myswappiness.conf" and put it there.

[JiriB]

Thank you everyone

[Schwarzer Kater]

Also see step 2 in: Essential and strongly recommended steps to take directly after a Kubuntu 25.04 installation.