Unbuntu apt-get update always could not get lock because its held by process xxxx?
8295
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
83216
apt get update missing release file
122588
Can't connect to ubuntu archive when using apt-get update
91491
How can I get "delta" packages to optimize apt-get upgrade downloads?
24603
apt-get upgrade gives "403 forbidden" error
34720
What is the difference in command-line "sudo apt-get update" and using Synaptic or Auto-updater?
13744
sudo apt-get update failing - "could not open" list file due to "permission denied"
158674
How do I get `apt-get update` to work on a machine with no internet access and manually assigned IP address?
91611
Unable to use package manager due to "exclusive lock" error
146117
Update locked within terminal
4124
I cannot run apt update properly - apt update hangs
12368
A "failed to fetch" error occurs when apt-get update is run. How do I fix this?
57661
How does apt-get really work?
157289
Why use apt-get upgrade instead of apt-get dist-upgrade?
113442
apt-get not working on Ubuntu 16.04, problems with kernel packages
35998
Why `sudo apt-get install XXXX` sometimes request confirmation, others not?
16578
How to upgrade a single package using apt-get?