Firefox update fails; "Could not get lock" error when I run sudo apt upgrade
728
Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
85009
`apt update` failed on Debian Linux
24603
apt-get upgrade gives "403 forbidden" error
143713
Upgrading Firefox fails. lzma error: compressed data is corrupt
6809
How do I fix the GPG error "NO_PUBKEY"?
19120
What is more reliable - apt-mark or APT-pin (/etc/apt/preferences.d/pin) for version locking?
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
113145
What does 'apt-get install update' do?
135985
Apt-get saying "Unable to correct problems, you have held broken packages."
33811
How to fix "Could not open lock file" because "Permission denied"?
139199
Postfix Failed to start : unable to set exclusive lock: Resource temporarily unavailable
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
124157
Can't login using Firefox 21 Nightly / 19 stable
121873
sudo apt-offline install not updating
40638
Cannot locate Ubuntu Software Center via Firefox to open APT links
27769
Problem with IPv6 sudo apt-get update/upgrade
105451
apt update: Could not handshake: An unexpected TLS packet was received