GPG error; The following signatures were invalid KEYEXPIRED
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
150033
E: Sub-process /usr/bin/dpkg returned an error code (1) for almost all updates
139199
Postfix Failed to start : unable to set exclusive lock: Resource temporarily unavailable
14028
GPG Error while downloading software: "Clearsigned file isn't valid, got 'NODATA'"
88691
Gpg symmetric decryption reduce the passphrase remember time
4248
How to fix apt: Signature by key uses weak digest algorithm (SHA1)?
84855
MySQL: "lock wait timeout exceeded"
35950
Bypass GPG signature checks only for a single repository
70482
The key provided is not a valid Google API Key
96692
"Unable to obtain authorization for this operation" when trying to reset my default keychain
154004
How do I fix invalid filename extension?
6809
How do I fix the GPG error "NO_PUBKEY"?
21483
no such file or directory 'authorized_keys'
12960
How to fix "not a valid identifier" error after setting environment variables?
113405
How to disable the keyring for SSH and GPG?
116944
How to force GPG to use console-mode pinentry to prompt for passwords?
123300
Invalid keystore format