Axel has been upgraded to version 2.17.10, but SSL is still reporting an error Initializing download: https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key SSL error: certificate verify failed (null) Error: Child process exited with code 1

[simagui]

Axel has been upgraded to version 2.17.10, but SSL is still reporting an error
Initializing download: https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key
SSL error: certificate verify failed
(null)
Error: Child process exited with code 1

[popzxc]

What happens if you have to open corresponding url (https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key) with your browser? Can you download the file from there?

[simagui]

如果必须使用浏览器打开相应的URL（https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key），会发生什么情况？您可以从那里下载文件吗？

Yes, I can download files from this URL

[popzxc]

And if you run axel manually from the command line, can you download any file from other https hosts?

[simagui]

并且，如果您从命令行手动运行axel，可以从其他https主机下载任何文件吗？
No, this will cause an error:
root@ubuntu02:~/wz# axel -n 1 https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key
Initializing download: https://universal-setup.ams3.digitaloceanspaces.com/setup_2%5E20.key
SSL error: certificate verify failed
(null)

[simagui]

And if you run axel manually from the command line, can you download any file from other https hosts?

The same error will be reported when downloading other HTTPS files using Axel. It should be the problem of downloading and installing Axel, I use Ubuntu system, I need to check again why there is such error, please let me know if you have a solution for this part. Thank you for your

[simagui]

并且，如果您从命令行手动运行axel，可以从其他https主机下载任何文件吗？

The highest version of apt-get in Ubuntu is 2.17.5, but 2.17.10 is not available. I used Axel 2.17.10 on the CentOS system for the installation. If that doesn't work is there no other way****

[simagui]

并且，如果您从命令行手动运行axel，可以从其他https主机下载任何文件吗？

The maximum version of apt-get axel on Ubuntu is 2.4, and the maximum version of apt-get axel installed with source code is 2.17.5. I use version 2.17.10 of CentOS for installation, if this does not work, there is no other way? Can only build ZKSync using CentOS?

[popzxc]

Personally I use 2.17.5 and it works for me, however 2.17.10 is recommended due to some problems observed with earlier versions.
On ubuntu you can build the latest axel version from source if required.

You may also google for your problem with axel, maybe it's something common and can be fixed easily.