The following signatures couldn't be verified because the public key is not available: NO_PUBKEY
121983
gpgkeys: key C927EBE00F1B0520 not found on keyserver
45169
SSH connection problem with "Host key verification failed..." error
126437
pass and gpg: No public key
1200
GPG can't check signature
9802
Google map signed api key errors in Android
97907
ECDSA Compressed public key point back to uncompressed public key point
39924
unzip error "End-of-central-directory signature not found"
70482
The key provided is not a valid Google API Key
126538
Ubuntu 12.04 GPG error: http://archive.ubuntu.com precise Release: The following signatures were invalid: NODATA 1 NODATA 2
113679
Looking for a one step solution to appending my SSH public key to a server's authorized_keys?
112879
W: The repository 'http://download.fpcomplete.com/ubuntu yakkety Release' is not signed
123300
Invalid keystore format
98047
SSH-Key authentication fails
90212
'http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release' is not signed
6289
SSH Permission denied (publickey)
21483
no such file or directory 'authorized_keys'
15413
sudo apt update always giving Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)