how to extend root file system under lvm safely?

[Amit_Mohabanshi]

Hi,

I want to extend size of my root  file system in lvm. is it require to unmount file system or run e2fsck in this procedure. please

give me step by step procedure.

Thanks

Amit

[Amit_Mohabanshi]

Hi,
After I extended logical volume for / file system it was not showing me increased space in df output. I rebooted the to make changes affect. but after reboot it asked me to run fsck manually.. could anyone please tell me why this is happening?

[Patrick Wallek]

Did you extend the file system after you extended the logical volume?  If not, that's probably the problem. 

See this link for a good basic tutorial:

http://tldp.org/HOWTO/LVM-HOWTO/extendlv.html