openmediavault是一個開源的NAS解決方案，安裝一個omv就相當於安裝了一個Debian系統。
第一次裝omv下載的是omv5，然后又重裝了omv4，悲催
直接從sourceforge上下載從omv5是單線程的，慢的難受。這里可以獲取直鏈然后用IDM下載。
在瀏覽器中拿到文件的地址：
https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso
用wget下載：
$ wget https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso
--2020-11-11 21:29:43-- https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso
Resolving sourceforge.net (sourceforge.net)... 216.105.38.13
Connecting to sourceforge.net (sourceforge.net)|216.105.38.13|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso/ [following]
--2020-11-11 21:29:44-- https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso/
Reusing existing connection to sourceforge.net:443.
HTTP request sent, awaiting response... 302 Found
Location: https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso/download [following]
--2020-11-11 21:29:45-- https://sourceforge.net/projects/openmediavault/files/5.5.11/openmediavault_5.5.11-amd64.iso/download
Reusing existing connection to sourceforge.net:443.
HTTP request sent, awaiting response... 302 Found
Location: https://downloads.sourceforge.net/project/openmediavault/5.5.11/openmediavault_5.5.11-amd64.iso?r=&ts=1605101385&use_mirror=nchc [following]
--2020-11-11 21:29:46-- https://downloads.sourceforge.net/project/openmediavault/5.5.11/openmediavault_5.5.11-amd64.iso?r=&ts=1605101385&use_mirror=nchc
Resolving downloads.sourceforge.net (downloads.sourceforge.net)... 216.105.38.13
Connecting to downloads.sourceforge.net (downloads.sourceforge.net)|216.105.38.13|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://nchc.dl.sourceforge.net/project/openmediavault/5.5.11/openmediavault_5.5.11-amd64.iso [following]
--2020-11-11 21:29:48-- https://nchc.dl.sourceforge.net/project/openmediavault/5.5.11/openmediavault_5.5.11-amd64.iso
Resolving nchc.dl.sourceforge.net (nchc.dl.sourceforge.net)... 140.110.96.69, 2001:e10:ffff:1f02::17
Connecting to nchc.dl.sourceforge.net (nchc.dl.sourceforge.net)|140.110.96.69|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 608174080 (580M) [application/octet-stream]
Saving to: ‘openmediavault_5.5.11-amd64.iso’
openmediavault_5.5.11-amd64.iso 0%[ ] 296.00K 10.2KB/s
Ctrl + C 結束下載，從日志中找到文件的直鏈：
https://nchc.dl.sourceforge.net/project/openmediavault/5.5.11/openmediavault_5.5.11-amd64.iso
Get! This is the direct URL for downloading!