On Wed, 2016-01-27 at 20:29 +0100, Walter Cazzola wrote:
Dear Linux Experts,
I've recently passed from Fedora 20 to Fedora 23 on my laptop.
I've a separate partition for /tmp that I'm used to see it wiped out at any reboot on my previous installation but now this is never wiped out.
This is a real partition:
/dev/sda10 5029504 1154204 3596772 25% /tmp
whereas previously it was a tmpfs partition. I've read on the web that after Fedora 20 the tmpfs has been dropped in favor of real partition but I was expecting anacron/cron entry that wipe the content of the partition at boot but my system doesn't have any.
It is also difficult to create my own anacron/cron entry because this should take effect before the system starts and create its temp files/sockets in there.
I'm also puzzled because I also have a couple of tmpfs partitions:
tmpfs 1633640 0 1633640 0% /run/user/989 tmpfs 1633640 16 1633624 1% /run/user/526
that I don't what they are for and if I can (and how) rid of them.
Probably I could add an entry like this tmpfs /tmp tmpfs rw,seclabe l 0 0
in /etc/fstab but this would means a waste of the space I currently have reserved for /tmp (4Gb not much but I would prefer to use them).
So there is a way to wipe out the /tmp partition before it has been mounted and the system creates its files and use the current partition for it?
I did a fully default install in a Virtualbox using: Fedora-Workstation-netinst-x86_64-23.iso
That install did use tmpfs for /tmp as seen below.
[root@localhost temp03]# df Filesystem 1K-blocks Used Available Use% Mounted on devtmpfs 1014436 0 1014436 0% /dev tmpfs 1024720 308 1024412 1% /dev/shm tmpfs 1024720 1184 1023536 1% /run tmpfs 1024720 0 1024720 0% /sys/fs/cgroup /dev/mapper/fedora-root 10504444 5544500 4403300 56% / tmpfs 1024720 48 1024672 1% /tmp /dev/sda1 487652 243549 214407 54% /boot tmpfs 204944 36 204908 1% /run/user/1000 [root@localhost temp03]# uname -a Linux localhost.localdomain 4.2.8-300.fc23.x86_64 #1 SMP Tue Dec 15 16:49:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux [root@localhost temp03]# cat /etc/fedora-release Fedora release 23 (Twenty Three)
If tmpfs is still the standard then that should explain why it is not cleaning it. As for how to run a shutdown version of rc.local it looks like it is pretty well expained in the first few hits using:
fedora run script at shutdown
Looks like you just create your own script (could call it rc.local.shutdown) and wrap it into a new systemd service.