Re: /usr

[Jon Haugsand <Jon-H Haugsand norges-bank no>]

* bulent acikgoz
> Hello friends,
> I have like this disk structure;
> 
> root bulentlnx root]# df -k
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hda2             32257404   4643176  25975600  16% /
> /dev/hda1               102454     47179     49985  49% /boot
> /dev/hdc1              8127400     32812   7681740   1% /oracle
> none                    256936         0    256936   0% /dev/shm
> /dev/hda3              4539104   4155308    153216  97% /usr
> /dev/cdrom              463974    463974         0 100% /mnt/cdrom
> [root bulentlnx root]#
> 
> I want to add space for /usr. How can I this dinamiclly and also not
> disturb?

Several methods:

1. Easy one:  make a directory on an available file system, copy parts
of /usr to it and add a symbolic link:.  E.g.
    mkdir /oracle/usr/lib
    cp -a /usr/lib /oracl/usr
    mv /usr/lib /usr/lib.orig
    ln -s /oracle/usr/lib /usr/lib
    # Do some testing
    rm -Rf /usr/lib.orig

2. Find a place with a lot of free space which is greater than you
   currently have for /usr.  Copy whole of /usr to it.

3. Use logical partitioning.  This I like a lot.  When I got my last
   Disk it was way too small, but I made six file systems:
   /
   /var
   /usr
   /usr/local
   /home
   /opt

   When this began to feel crowded, I bought a new disk, installed it,
   create one big partition, made a physical volume, and gave
   distributed the space to all my file systems.  Thus, I can take
   away space, and grant it to another file system as I like.  Easy.

-- 
 Jon Haugsand, Jon-H Haugsand norges-bank no
 http://www.norges-bank.no