Create and mount large files

1. Create large files , Create mount directory

dd if=/dev/null of=/home/ck/try_mk_big_file bs=1M count=512

mkdir /home/ck/mount_big_file_dir

1. Format large files

mkfs.ext4 /home/ck/try_mk_big_file

blkid /home/ck/try_mk_big_file You can see UUID

1. mount

mount -o loop /home/ck/try_mk_big_file /home/ck/mount_big_file_dir

You don't have to add -o loop Parameters , vfs It should automatically recognize

Through this method , It can achieve the effect similar to hard disk partition , When the number of disk partitions is not enough, it can be used as a backup , Very easy to use

The big file that comes out of this , In format as loop File exists