https://www.armbian.com/khadas-edge-2/

https://redirect.armbian.com/khadas-edge2/Jammy_legacy

check original link

curl https://redirect.armbian.com/khadas-edge2/Jammy_legacy -i
HTTP/2 302 
server: nginx/1.18.0
date: Fri, 26 May 2023 02:11:33 GMT
content-length: 0
location: https://mirror.iscas.ac.cn/armbian-releases/khadas-edge2/archive/Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz
x-geo-distance: 3377558.166124
 
~$ curl -i http://redirect.armbian.com/khadas-edge2/Jammy_legacy
HTTP/1.1 302 Found
Server: nginx/1.18.0
Date: Fri, 26 May 2023 03:23:24 GMT
Content-Length: 0
Connection: keep-alive
Location: http://armbian.tnahosting.net/dl/khadas-edge2/archive/Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz
X-Geo-Distance: 1883751.967384

create external image link

~$ echo http://redirect.armbian.com/khadas-edge2/Jammy_legacy > test-edge2-armbian-external.img.xz 
 
storage@web:/storage/.images/edge2$ ls -l1 test-edge2-armbian-external.img.xz 
-rw-rw-r-- 1 storage storage 54 May 25 23:24 test-edge2-armbian-external.img.xz
 
## setup permission for use link features
~$ chmod 0667 test-edge2-armbian-external.img.xz
 
~$ ls -l1 test-edge2-armbian-external.img.xz 
-rw-rw-rwx 1 storage storage 54 May 25 23:24 test-edge2-armbian-external.img.xz

check link redirection from dl server

~$ curl -is http://dl.khadas.com/.images/edge2/test-edge2-armbian-external.img.xz | head -n7
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Fri, 26 May 2023 05:32:14 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://redirect.armbian.com/khadas-edge2/Jammy_legacy

We recommend use zxe feature for image developers, for provide better service for users like a:

• Provide additional information about images
• Its fully compatible with common xz format, and same possible to use anywhere
• Fast checking image integrity before write it
• Make warranty its image will be suitable for current board installation
• Fast optimal compression for fastest decompression on SBC
• Image signup
• etc ..

check oowow meta online example

~$ curl -s -jkLf -r-4096 http://dl.khadas.com/.images/edge2/edge2-ubuntu-22.04-server-linux-5.10-fenix-1.5-230425.img.xz | xz -dc
##META_FILE##
FILE: edge2-ubuntu-22.04-server-linux-5.10-fenix-1.5-230425.img.xz
UNPACKED_SIZE: 2634022912
PACKED_SIZE: 429813760
FILE_SIZE: 429817856
##META-FILE##
 
##KRESCUE_META##
type:xz
label: Ubuntu
match: BOARD=Edge2
builder: fenix
link: https://dl.khadas.com/Firmware/
desc: Ubuntu 1.5 server jammy - fenix generated images https://github.com/khadas/fenix
duration: 60
date: Tue 25 Apr 2023 01:56:58 PM UTC
image: edge2-ubuntu-22.04-server-linux-5.10-fenix-1.5-230425.img
##KRESCUE-META##
##KRESCUE##END

decompression original files

master@universe:~/khadas/img/edge2$ time xz -dc Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz > Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img
 
real	0m31.879s
user	0m30.135s
sys	0m1.418s
master@universe:~/khadas/img/edge2$ time pixz -dc Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img
 
real	0m3.181s
user	0m39.479s
sys	0m1.180s
 
~$ ls -l1 Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz 
-rw-rw-r-- 1 master master 582247696 May 26 10:11 Armbian_23.2.9_Khadas-edge2_jammy_legacy_5.10.160.img.xz