What does mean theese filesystem

Discussion in 'Linux Beginners' started by pecka33, Oct 12, 2022.

  1. pecka33

    pecka33 Member

    when i used command to chceck disks df -h a get

    Filesystem Size Used Avail Use% Mounted on
    udev 16G 0 16G 0% /dev
    tmpfs 3.2G 676K 3.2G 1% /run
    /dev/sda1 915G 58G 811G 7% /
    tmpfs 16G 0 16G 0% /dev/shm
    tmpfs 5.0M 0 5.0M 0% /run/lock
    /dev/sdb1 915G 1.1M 869G 1% /mnt
    tmpfs 3.2G 0 3.2G 0% /run/user/0

    I know that is sda ana sdb, but not sure about other filesystem? Because i think that when i created dedicated server, there was only udev and tmpfs once, but now i can see more.

    In my ispconfig panel i can see only
    and sda and sdb
    Specialy i dont know that is /dev/shm
    Is possible to found usage or remove them? Thank you
  2. nhybgtvfr

    nhybgtvfr Well-Known Member HowtoForge Supporter

    they're temporary virtual file systems.
    they don't use any disk space, they use ram. any data in them is lost in a reboot.
    they're used as dynamic device manager (udev) or for temporary files

    you can delete them, though the files may be needed for running services/applications/devices. so expect problems if you do.
    if you do have problems, they'll be solve by a reboot, when any necessary temporary files/folders will be recreated.

    google udev or tmpfs for more information on them than you could possibly ever want to know.

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