topic What are filesystems can be unmounted in single uesr mode in linux in Operating System - Linux

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

senthil_kumar_1 — Thu, 22 Apr 2010 14:06:22 GMT

Hi All,

Can I umount following filesystems in single user mode?

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

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

Steven E. Protter — Thu, 22 Apr 2010 14:44:38 GMT

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

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

Steven Schweda — Thu, 22 Apr 2010 19:58:00 GMT

> 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.

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

AnthonySN — Thu, 22 Apr 2010 20:57:05 GMT

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.

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

Kranti Mahmud — Wed, 28 Apr 2010 04:59:46 GMT

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