Why are there many tmpfs filesystems mounted on the server?

Solution Verified - Updated -

Issue

  • Why are there many tmpfs on the system which are not in /etc/fstab file?
  • What is the purpose of having these tmpfs mounted?
Filesystem Size Used Avail Use% Mounted on
tmpfs      187G    0  187G   0% /dev/shm
tmpfs      187G  41M  187G   1%  /run
tmpfs      187G    0  187G   0% /sys/fs/cgroup
tmpfs       38G    0   38G   0% /run/user/1710
tmpfs       38G    0   38G   0% /run/user/900
tmpfs       38G    0   38G   0% /run/user/1708
tmpfs       38G    0   38G   0% /run/user/0

Environment

  • Red Hat Enterprise Linux 7

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