[root@localhost LiveOS]# mount squashfs.img  /mnt/squashfs/
mount: /mnt/sdb1/iso/LiveOS/squashfs.img is not a block device (maybe try `-o loop‘?)
[root@localhost LiveOS]# mount -o loop /mnt/squashfs/
mount: can‘t find /mnt/squashfs/ in /etc/fstab or /etc/mtab
[root@localhost LiveOS]# mount -o loop  squashfs.img  /mnt/squashfs/

 mkdir test
mkdir: cannot create directory `test‘: Read-only file system