I'm using Ubuntu 12.04 LTS and I installed via Wubi on a partition of 27 GB. I chose the installation to be that size, too.

Then after installing some software I was prompted with a notice saying that /usr is full. In the windows that followed it shows that the total space of /usr is only 3.7 GB. I've no idea how that could happen while the Ubuntu partition has 10+ GB of free space.

So my question is: how can I expand the "size" of /usr, which makes no sense to me that it is not using the free space in the partition.

Thanks much!

The output of mount is as follows:

/dev/loop0 on / type ext4 (rw,errors=remount-ro)

proc on /proc type proc (rw,noexec,nosuid,nodev)

sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)

none on /sys/fs/fuse/connections type fusectl (rw)

none on /sys/kernel/debug type debugfs (rw)

none on /sys/kernel/security type securityfs (rw)

udev on /dev type devtmpfs (rw,mode=0755)

devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)

tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)

none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)

none on /run/shm type tmpfs (rw,nosuid,nodev)

/dev/sda7 on /host type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

/host/ubuntu/disks/usr.disk on /usr type ext4 (rw)

/host/ubuntu/disks/home.disk on /home type ext4 (rw)

gvfs-fuse-daemon on /home/yzhanghf/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=yzhanghf)

/dev/sda6 on /media/Scientific type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)

/dev/sda5 on /media/Software type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)

/dev/sda2 on /media/OS type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)

/dev/sda1 on /media/SYSTEM type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)