Un grand merci !
Version initialement installée : cat /var/log/installer/media-info
Date de l'installation initiale : ls -l /var/log/installer/media-info | awk '{print "Install date =", $6, $7, $8}'
Mise à jour vers la version : grep "release-upgrader version" /var/log/dist-upgrade/main.log
Date de la mise à jour : ls -l /var/log/dist-upgrade/main.log | awk '{print "Upgrade date =", $6, $7, $8}'
Exemple :
$ cat /var/log/installer/media-info
Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
$ ls -l /var/log/installer/media-info | awk '{print "Install date =", $6, $7, $8}'
Install date = nov. 8 2011
$ grep "release-upgrader version" /var/log/dist-upgrade/main.log
2016-05-11 12:12:08,917 INFO release-upgrader version '16.04.14' started
$ ls -l /var/log/dist-upgrade/main.log | awk '{print "Upgrade date =", $6, $7, $8}'
Upgrade date = mai 11 2016