[arch-general] tmpfs

[Jan de Groot]

On Fri, 2010-03-26 at 00:53 +0900, Juan Diego wrote:
> Good day everyone,
> 
> I want to delete the next two lines from my fstab:
> 
> none /dev/pts devpts defaults 0 0
> none /dev/shm tmpfs defaults 0 0
> 
> however I would like to know the secondary effects of doing such
> thing, all the information I could get on the internet is that shm is
> for POSIX shared memory support and that almost any program actually
> use it, for devpts I couldn't find much information about it.
> 
> does anyone knows if it is safe to remove those lines from my fstab?
> 
> thank you.

/dev/pts is required for virtual terminals like xterm, gnome-terminal
and others. Without that filesystem you can't start a virtual terminal.

/dev/shm is used for shared memory, it's a requirement for NPTL
semaphore functions. Now that /dev is also on tmpfs, I don't know if
it's harmful to remove. The main requirement is that this folder has
1777 permissions.