What is the difference between apt-get update and upgrade?

Question

What is the difference between apt-get update and apt-get upgrade?

Which should I run first?

Do any of them automatically run the other?

See: askubuntu.com/questions/99033/… What is the difference between apt-get upgrade and apt-get dist-upgrade?
Possible duplicate of: askubuntu.com/questions/81585/… OR askubuntu.com/questions/99033/…
It's not a duplicate: this is about the difference between update/upgrade, not about the difference between upgrade/dist-upgrade.

gertvdijk · Accepted Answer · 2012-12-28 13:00:56Z

up vote 36 down vote accepted

You should first run update, then upgrade. Neither of them automatically runs the other.

apt-get update updates the list of available packages and their versions, but it does not install or upgrade any packages.
apt-get upgrade actually installs newer versions of the packages you have. After updating the lists, the package manager knows about available updates for the software you have installed. This is why you first want to update.

edited Dec 28 '12 at 13:00

gertvdijk
12.4k11959

answered Jan 9 '12 at 17:16

Timo Kluck
945311

4

Keep in mind that most of the times instead of apt-get upgrade what you want to do is apt-get dist-upgrade – fdierre Jan 9 '12 at 23:41

For the difference between apt-get upgrade and apt-get dist-upgrade see help.ubuntu-it.org/6.06/ubuntu/serverguide/it/apt-get.html – Pino yesterday

1 Answer