ramdisk.img 格式【解压/压缩】

[root@localhost ramdisk]# file ramdisk.img
ramdisk.img: u-boot legacy uImage, ramdisk, Linux/ RAMDisk Image (gzip), 24477522 bytes, Wed Apr 19 18:10:25 2023, Load Address: 0x10000000, Entry Point: 0x10000000, Header CRC: 0xEDB56EAE, Data CRC: 0x2B30F69D

[root@localhost ramdisk]# dd if=ramdisk.img of=ramdisk bs=64 skip=1
382461+1 records in
382461+1 records out
24477522 bytes (24 MB) copied, 0.96834 s, 25.3 MB/s

[root@localhost ramdisk]# file ramdisk
ramdisk: gzip compressed data, was "ramdisk", from Unix, last modified: Wed Apr 19 18:10:12 2023, max compression

[root@localhost ramdisk]#  mv ramdisk ramdisk.gz
[root@localhost ramdisk]#  gunzip -v ramdisk.gz
ramdisk.gz:      90.9% -- replaced with ramdisk

[root@localhost ramdisk]# file ramdisk
ramdisk: Linux rev 1.0 ext4 filesystem data, UUID=a05e3c7e-a748-4ee7-accb-da2a0de89e15 (extents) (64bit) (large files) (huge files)

[root@localhost ramdisk]# mount -o loop ramdisk /root/ramdisk

[root@localhost ]# ls ramdisk/
bin      dev  lib    linuxrc     media  opt   root  sbin  tmp  var
configs  etc  lib64  lost+found  mnt    proc  run   sys   usr