mjhjmtu

Apt update on Ubuntu 16.04 hangs randomly every view updates.

Nothing I've tried can permanently fix it and I have no way to troubleshoot it.

The only solution I have is to create a shell script to apt clean && apt update. then it works.

echo -e '#!/bin/bashnsudo apt clean && sudo apt update' | sudo tee /usr/bin/apt-update; sudo chmod +x /usr/bin/apt-update

Things I've done:

Switch to google DNS

Disable NetworkManager managed DNS

sudo sed -i -e 's/^dns=dnsmasq/#dns=dnsmasq/' /etc/NetworkManager/NetworkManager.conf

Add Google DNS to DHCP Client (dhcp will prepend google DNS to /etc/resolv.conf)

echo 'prepend domain-name-servers 8.8.4.4;' | sudo tee -a /etc/dhcp/dhclient.conf

echo 'prepend domain-name-servers 8.8.8.8;' | sudo tee -a /etc/dhcp/dhclient.conf

Restart NetworkManager

systemctl restart NetworkManager.service

edit apt config

Some repos have issues with http/1.1 pipelining.

Try the following:

echo 'Acquire::http::Pipeline-Depth "0";' | sudo tee /etc/apt/apt.conf.d/99pipelining-off

Sometimes its hard to see which repos are failing because of long timeouts

reduce the timeouts with

echo 'Acquire::http::Timeout "5";' | sudo tee /etc/apt/apt.conf.d/99reduce-timeout

Force IP V4 to disable attempting to resolve IP V6

echo 'Acquire::ForceIPv4 "true";' | sudo tee /etc/apt/apt.conf.d/99force-ipv4

create script for apt-update

Apt-get update often hangs/fails. the work around for this is to always apt clean before apt update

This command creates a script called apt-update that does just this and should be used instead of apt-get update or apt update

echo -e '#!/bin/bashnsudo apt clean && sudo apt update' | sudo tee /usr/bin/apt-update; sudo chmod +x /usr/bin/apt-update

enable automatic mirror switching

sudo sed -i -e 's/deb http://il.archive.ubuntu.com/ubuntu//deb mirror://mirrors.ubuntu.com/mirrors.txt/' sources.list

enable partner repo

sudo sed -i.bak "/^# deb .*partner/ s/^# //" /etc/apt/sources.list

I tried editing the clean policy

echo 'DSELECT::Clean "always";' | sudo tee /etc/apt/apt.conf.d/99DselectAlwaysClean

echo 'APT::Get::Clean=always;' | sudo tee /etc/apt/apt.conf.d/99AlwaysClean

I even tried adding Post update and Pre update commands with

echo 'APT::Update::Post-Invoke "/usr/bin/apt apt clean ;' | sudo tee /etc/apt/apt.conf.d/99PostUpdateClean

echo 'APT::Update::Pre-Invoke "/usr/bin/apt clean ;' | sudo tee /etc/apt/apt.conf.d/99PreUpdateClean

these 2 commands are actually problematic because they seem to try to steal lock or something. In the end I deleted them.

How can I permanently resolve this issue without resorting to hacks like a shell script that does apt clean && apt update?

How can I troubleshoot this issue?

Try adding this to your /etc/hosts file:

127.0.1.1 yourhostname

I am also assuming that there are no issues with your /etc/hostname file.