When did I upgrade to Ubuntu 16.04?

Question

It has been several months since I upgraded my Ubuntu version. How can I find the date that I upgraded?

It has been suggested to look in the directory /var/log/dist-upgrade but this directory is empty on my system.

Answer 1

Logs for the upgrade are found in

/var/log/dist-upgrade

Mine looks like this

-rw------- 1 root root 511516 Jul 19 19:05 apt-clone_system_state.tar.gz
-rw-r--r-- 1 root root 428135 Jul 19 19:28 apt.log
-rw-r----- 1 root adm  636471 Jul 19 19:28 apt-term.log
-rw-r--r-- 1 root root 116390 Jul 19 19:28 history.log
-rw-r--r-- 1 root root   1125 Jul 19 19:05 lspci.txt
-rw-r--r-- 1 root root  64976 Jul 19 19:29 main.log
-rw-r--r-- 1 root root     78 Jul 19 19:29 xorg_fixup.log

Presumably I upgraded this VM on July 19th.