Ign http://dev.mysql.com mysql InRelease
Err http://dev.mysql.com mysql Release.gpg
  Unable to connect to dev.mysql.com:http:
Ign http://dev.mysql.com mysql Release
Err http://dev.mysql.com mysql/main amd64 Packages
  Unable to connect to dev.mysql.com:http:
Err http://dev.mysql.com mysql/main Translation-en
  Unable to connect to dev.mysql.com:http:
Fetched 9616 B in 1min 3s (152 B/s)
W: Failed to fetch http://dev.mysql.com/downloads/repo/apt/dists/mysql/Release.gpg  Unable to connect to dev.mysql.com:http:

W: Failed to fetch http://dev.mysql.com/downloads/repo/apt/dists/mysql/main/binary-amd64/Packages  Unable to connect to dev.mysql.com:http:

W: Failed to fetch http://dev.mysql.com/downloads/repo/apt/dists/mysql/main/i18n/Translation-en  Unable to connect to dev.mysql.com:http:

E: Some index files failed to download. They have been ignored, or old ones used instead.