What are filesystems can be unmounted in single uesr mode in linux

[senthil_kumar_1]

Hi All,

Can I umount following filesystems in single user mode?

/var , /tmp , /appl, /opt, /usr

[Steven E. Protter · Accepted solution]

Shalom,

In single user mode no file systems are mounted. This may vary from distribution to distribution.

You can do a mount -a to mount all file systems. This will not mount NFS file systems.

Single user mode does not have networking enabled, but unlike HP-UX you can start networking as well.

SEP

[Steven Schweda]

> In single user mode no file systems are
> mounted. [...]

"/"?

You can "umount" any file system which is not
being used. The details may depend on how
you get to single-user mode. If you boot
into single-user mode, then few, if any,
non-"/" file systems should be mounted. If
you drop down into single-user mode from some
higher run level, then there may be some
processes running which use files on other
file systems.

> [...]in linux

Not a very detailed description of the OS
involved.

[AnthonySN]

ans to your question is yes AFAIK in linux and hpunix.

but note that in linux when you directly boot to single user mode the filesystems are mounted as readonly.

[Kranti Mahmud]

Hi Senthil,

In Linux any file system which is not
being used can be "umount" in single user mode. It depend on how you get to single-user mode.

Rgds-Kranti