Which is the correct apt source to install 4.5 on xenial?

[enricostano]

$ cat /etc/apt/sources.list.d/deb_nodesource_com_node_4_5.list 
deb https://deb.nodesource.com/node_4.5 xenial main
deb-src https://deb.nodesource.com/node_4.5 xenial main

This one doesn't work. Any hint?

$ sudo apt-get update
[sudo] password for ubuntu: 
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]
Hit:2 http://archive.ubuntu.com/ubuntu xenial InRelease                         
Hit:3 http://ppa.launchpad.net/brightbox/ruby-ng/ubuntu xenial InRelease        
Get:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [95.7 kB]           
Ign:5 https://deb.nodesource.com/node_4.5 xenial InRelease                                       
Ign:6 https://deb.nodesource.com/node_4.5 xenial Release       
Ign:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Ign:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Ign:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Ign:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Ign:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Err:7 https://deb.nodesource.com/node_4.5 xenial/main Sources
  404  Not Found
Ign:8 https://deb.nodesource.com/node_4.5 xenial/main amd64 Packages
Ign:9 https://deb.nodesource.com/node_4.5 xenial/main all Packages
Ign:10 https://deb.nodesource.com/node_4.5 xenial/main Translation-en_US
Ign:11 https://deb.nodesource.com/node_4.5 xenial/main Translation-en
Fetched 190 kB in 1s (155 kB/s)
Reading package lists... Done
W: The repository 'https://deb.nodesource.com/node_4.5 xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch https://deb.nodesource.com/node_4.5/dists/xenial/main/source/Sources  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

[chrislea]

You shouldn't install 4.5.0 as it's been superseded by 4.6.0 (which includes security updates).

The 4.x line is LTS, meaning you're guaranteed API compatibility, so you should always be using whatever the newest 4.x release is.

The correct entries in your .list file should look like:

deb https://deb.nodesource.com/node_4.x xenial main
deb-src https://deb.nodesource.com/node_4.x xenial main