How to solve this problem (404 Not Found) while updating
133
How can I fix a 404 Error when using a PPA or updating my package lists?
23918
HTTP Status 404 - Servlet [ServletName] is not available
86777
Distribution upgrade problem "No new release found"
52181
How to fix "404 Not Found" crawl errors reported by Google in Search Console
121201
Why can't I update applications without upgrading the whole OS?
107792
Update information outdated, "Failed to fetch cdrom"
116998
404 Not Found Errors -> Redirect
4336
"404. That’s an error." when viewing from Google cache
3303
SEO (or other) problems with a 404?
30754
Cannot update: "No available releases found"
53336
Set Update Manager to install to sites/all/modules/contrib?
12368
A "failed to fetch" error occurs when apt-get update is run. How do I fix this?
99687
update-alternatives --install says it needs link name path priority?
31506
How do I update Ubuntu manually?
57950
update-initramfs is stuck
110111
HTTP Status 404 - The requested resource (/ProjectName/) is not available
128471
How do I update from 9.0.10 to 9.1.0?