Securing /dev/shm

Edit your /etc/fstab:

# vi /etc/fstab

change:

none /dev/shm tmpfs defaults,rw 0 0

to

none /dev/shm tmpfs defaults,nosuid,noexec,rw 0 0

Remount /dev/shm:

# mount -o remount /dev/shm

You can test it runnig a script on /dev/shm, if you get “permission denied” it is fine!

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