GPG Error while downloading software: "Clearsigned file isn't valid, got 'NODATA'"
24355
Got NODATA issue: 'NODATA' (does the network require authentication?)
85711
verifiying ubuntu iso with repository gpg-keys
35950
Bypass GPG signature checks only for a single repository
105451
apt update: Could not handshake: An unexpected TLS packet was received
121946
Problems downloading artifact - error reading signed content
76614
BAD signature when trying to verify SHA256SUMS for Bionic Beaver ISO
83924
error while trying to sudo apt-get update GPG, no sign repository
126437
pass and gpg: No public key
111810
How do I check the checksum of a download and why should I?
12960
How to fix "not a valid identifier" error after setting environment variables?
56300
How can I disable the "Open File Security Warning" when I want to run downloaded executable files?
150033
E: Sub-process /usr/bin/dpkg returned an error code (1) for almost all updates
13720
apt-get update fails to fetch files, “Temporary failure resolving …” error
154622
How do I resolve this installation error?
23286
dpkg: error: dpkg status database is locked by another process
93942
How to fix "Failed to download repository information" error while updating?
41844
Package Install via Market sometimes fails and gives seemingly random error message