I need to create /dev/shm
on an embedded ARM system.
From "Installed The Latest Changes to Current and……".
I see that it can be created with mkdir /lib/udev/devices/shm
, but I'm wondering what is supposed to be at that location? The only directory I have at that location is /lib/modules/
, there's no devices/
or anything.
So I went ahead and just created them, empty directories. I then added:
tmpfs /dev/shm tmpfs defaults 0 0
to my /etc/fstab
and I didn't add an mtab
entry, since I don't have an /etc/mtab
. I then rebooted and now, there's still no /dev/shm
device.
Any ideas how I get that device?
EDIT #1
Oh, and a mount -a
(after a reboot) results in:
# mount -a
mount: mounting tmpfs on /dev/shm failed: No such file or directory`
Best Answer
An embedded system may have a static
/dev
, rather than use udev to populate it. If you don't have/lib/udev
, then presumably your system isn't running udev. In that case, you need to create/dev/shm
on the root filesystem.If the root filesystem is an initramfs, rebuild your initramfs with an extra line in the initramfs description file:
If the root filesystem is an on-disk filesystem, just create the directory.