Some index files failed to download / public key not available
6809
How do I fix the GPG error "NO_PUBKEY"?
19361
Can't update because the word prox* is blocked
141490
After site collection restore, site cannot be crawled?
134836
UnauthorizedAccessException cannot resolve Directory.GetFiles failure
124605
Apt server certificate error with download.01.org
41309
What are reserved filenames for various platforms?
14667
File sync error (AUTH_FAILED)
21483
no such file or directory 'authorized_keys'
6954
DRM errors on startup
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
135555
Is Ubuntu's archive signing key available via HTTPS somewhere?
34069
Why am I getting authentication errors for packages from an Ubuntu repository?
96697
Not able to generate private.key file
97771
"The package lists or status file could not be parsed or opened"
102001
Certain "core" apps lost access to media files
53099
How to fix "-5 No address associated with hostname error" while updating?
154420
"Failed to download repository information" error