Apt-Get Update Stuck: Connecting to Security. Ubuntu. Com
When I Run Apt-Get Update on My Machine It Gets Stuck at: 100% [Connecting to Security. Ubuntu. Com (2001:67C:1562: :15)] [Connecting to Archive. Canonical...
When I run apt-get update on my machine it gets stuck at:
100% [Connecting to security.ubuntu.com (2001:67c:1562::15)] [Connecting to archive.canonical.com (2001:67c:1360:8c01::16)]
I have made no recent changes to the system and use my home network which worked fine previously.
I can't explain why it switched to using IPv6.
I have IPv6 set to ignore for the wireless network:
Ouput of ip addr:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: mlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 4c:0b:be:22:0a:b4 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.106/24 brd 192.168.2.255 scope global dynamic mlan0
valid_lft 1814086sec preferred_lft 1814086sec
inet6 ::d5:b551:28db:2789:225/64 scope global temporary dynamic
valid_lft 604483sec preferred_lft 85483sec
inet6 ::d5:4e0b:beff:fe22:ab4/64 scope global mngtmpaddr dynamic
valid_lft 604779sec preferred_lft 86379sec
inet6 fe80::4e0b:beff:fe22:ab4/64 scope link
valid_lft forever preferred_lft forever
This worked for me, courtesy of Zach Adams ():
Turns out this is an issue where connecting over IPv6 on some servers causes them to get stuck at this point. The fix is really simple.
Open /etc/gai.conf
Under the line
# For sites which prefer IPv4 connections change the last line to
Uncomment the following line by removing the #:
# precedence ::ffff:0:0/96 100This will allow you to still use IPv6 but sets IPv4 as the precedence so that apt-get won’t get stuck.
The IPv6 setting for the network were ignored, but disabling IPv6 via /etc/sysctl.conf worked:
Add the following lines at the bottom of /etc/sysctl.conf:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
Run sudo sysctl -p to reload the /etc/sysctl.conf settings.
A better approach is to use apt-get as follows instead of editing gai.conf file.
sudo apt-get -o Acquire::ForceIPv4=true update
If you want to make this persistent just add an alias for 'apt-get' in your bash file.
Other solutions did not help ... in my case I created an aws ec2 instance Ubuntu 18.04 using
Auto-assign Public IP -> no pick disable
after trying all suggested solutions I threw up my hands and killed that and created a new ec2 instance using
Auto-assign Public IP -> yes Use subnet setting (Enable)
and it worked fine ... apt-get update && apt-get upgrade are happy now
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
