Why ubuntu doesn't use https as default for apt update?
10069
Are repository lists secure? Is there an HTTPS version?
157904
error 503: service unavailable when using apt-get update behind proxy
121152
Secure Download (HTTPS) for Ubuntu Desktop
133554
Chrome Version 44.0.2403.89 m is trying to force HTTPS
72082
Is using Software Updater the same thing as running apt-get update and apt-get upgrade?
11909
404 error with apt-get update, Don't have any PPA's
73525
Do old package versions in CentOS mean that they do not have security fixes?
16753
Why should I regularly run 'apt-get update' and similar commands?
43890
Properly setting up a "default" nginx server for https
94986
Connection Refused while apt-get update ubuntu 18.04 over proxy
90822
How can I install just security updates from the command line?
135107
Openssl upgraded via apt-get, `openssl version` showing previous version
152479
Why are apt-get repositories hardcoded to a specific release?
75879
How do I get add-apt-repository to work through a proxy?
157289
Why use apt-get upgrade instead of apt-get dist-upgrade?
107388
How to set default application for special link types (e.g., ssh://)?
34720
What is the difference in command-line "sudo apt-get update" and using Synaptic or Auto-updater?