[lfs-support] Chapter 9 device is busy

Rob Chua rob2x_chua12 at ymail.com
Mon Sep 9 05:46:49 PDT 2013


can you help me with this?
root at rob:/home/rob# umount -v $LFS/dev/pts
umount: /dev/pts: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
root at rob:/home/rob# if [ -h $LFS/dev/shm ]; then
> link=$(readlink $LFS/dev/shm)
> umount -v $LFS/$link
> unset link
> else
> umount -v $LFS/dev/shm
> fi
shm has been unmounted
root at rob:/home/rob# umount -v $LFS/dev
umount: /dev: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
root at rob:/home/rob# umount -v $LFS/proc
umount: /proc: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
root at rob:/home/rob# umount -v $LFS/sys
umount: /sys: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
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