Types of devices in Linux

Loop device

Loop device

One. Reference commands
[Email protected] a]# Losetup
Usage
Losetup Loop_device # Give info
losetup-d Loop_device # Delete
Losetup-f # Find Unused
LOSETUP-A # list all used
Losetup-r # Read-only Loop
Losetup [-E encryption] [-O offset] [-r] {-f|loop_device} file # Setup
[Email protected] a]#

Two. Loop mount
2.1 Mount to an idle loop device
[Email protected] a]# losetup-f-o $[208845*512]/lvm/vm/vm41.img
2.2 Mount to the specified loop device
[Email protected] a]# Losetup/dev/loop4-o $[208845*512]/lvm/vm/vm41.img
2.3 View all in-use loop devices
[Email protected] a]# losetup-a
/DEV/LOOP0: [fd00]:327683 (/lvm/vm/vm42.img), offset 106928640
/DEV/LOOP4: [fd00]:327682 (/lvm/vm/vm41.img), offset 106928640

Three. Loop Delete
Losetup-a
Losetup-d/DEV/LOOP1

Device types in Linux