/usr/.tempdisk on /tmp, /var/tmp after upgrade? — CyberPanel - WebHosting Control Panel for OpenLiteSpeed

/usr/.tempdisk on /tmp, /var/tmp after upgrade?

I've noticed after CyberPanel update to a recent version that upgrade.py script created a file /usr/.tempdisk of 1.5G for loop mount on /tmp, /var/tmp.

Can I ask the reasons behind this?
Is it safe to revert that change back to casual fs or at least change its size?


  • Thanks, that explains reasons. Still sounds like a waste of space for me. Wouldn't tmpfs be better for /tmp? I don't run many sites on CyberPanel, but my /tmp usage are usually only around 10-15 Mb while file with FS are strictly 1.5G. Probably should ask a feature request for custom size and/or tmpfs.
  • @NStorm

    If you can configure /tmp on tmpfs its fine. But normally by default it may not be good, not everyone will have small /tmp and large ram.

    You can customize /tmp to your needs, our main goal was to make temp noexec.
  • Hi, how to delete the /usr/.tempdisk safely? and remove /dev/loop0 too?

    my disk space is critical now.
  • @tiger where do you want to mount /tmp then?
  • currently? none. o see the usage is 4% from 1.5GB.

    i already read "/tmp is now mounted with noexec,nosuid,nodev,nofail flags by default." but still doesn't understand what is the usage?

  • So that no one can execute commands in /tmp, for security reasons.
  • I also facing this problem, my .tempdisk become 17GB or about 60% of total disk
  • @panelis you can change it to keep in RAM. Change this line in /etc/fstab:

    /usr/.tempdisk /tmp ext4 loop,rw,noexec,nosuid,nodev,nofail 0 0
    to this:
    none /tmp tmpfs size=15%,loop,rw,noexec,nosuid,nodev,nofail 0 0
    Where you can adjust maximum allowed RAM used by changing size= part. Reboot and you can rm /usr/.tempdisk.
    If wish to keep on disk but less in size, do the following:
    1. Stop all your services (mariadb, litespeed, etc).
    2. umount /var/tmp && umount /tmp
    3. rm /usr/.tempdisk
    4. dd if=/dev/zero of=/usr/.tempdisk bs=1M count=XX (where XX are wanted size in Mb)
    5. mkfs.ext4 /usr/.tempdisk
    6. Reboot
  • @NStorm
    I can also use this to increase the /tmp partition?
    Mine if 1.5GB (the default size) and I'm constantly getting core dumps in it so I have to delete those so that /tmp doesn't run out of space.

    Could you explain why should I(we) set block size so 1M?
  • Also, is it a better idea to have /tmp partition in RAM, given that the server has enough of it?
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