I done chown for a directory but i haven't permission to go in it !!!
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What is the filesystem used that is mounted on /mnt/lfs/? Is it mounted read only, or a foreign filesystem such as fat32? If the filesystem is corrupt, the kernel will change access to read only to prevent further corruption.
What does `ls -d /mnt/lfs/ /mnt/lfs/tools' show for the ownership and permissions? If root is denied x access to /mnt/lfs/ then it can't enter to change /mnt/lfs/tools/.
root@UBUNTU-32bit:/# ls -ld /mnt/lfs/ /mnt/lfs/tools
drwx------ 3 user user 4096 Aug 13 11:57 /mnt/lfs/
drwxr-xr-x 5 lfs root 4096 Aug 13 14:15 /mnt/lfs/tools
/dev/sda1 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)
gvfs-fuse-daemon on /home/user/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=user)
gvfs-fuse-daemon on /root/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev)
/dev/sdb1 on /mnt/lfs type ext4 (rw)