I would like to mount /dev/shm in a freebsd jail. Every time I attempt to, I get these errors:

[root@gaming /]# mount -t tmpfs tmpfs /dev/shm
mount: /dev/shm: No such file or directory
[root@gaming /]# touch /dev/shm
touch: /dev/shm: Operation not supported
[root@gaming /]#

Jail works perfectly, I just can't figure out how to get devfs to automagically create a directory.


  • /dev/shm is a Linux thing just mount your tmpfs where you need it. – arved Mar 31 '15 at 10:06

If you want to use tmpfs inside jail it is better to add line like

tmpfs /jails/foo.example.org/tmp tmpfs rw,size=524288000 0 0

to the jail's fstab file.

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