4

I see on my server at the login, that a few updates are available.

How can I see which packages will be updated on my server without starting the update?

6

use the --dry-run, -s, --simulate, --just-print, --recon, --no-act argument and it won't actually do anything, it'll just tell you what it would do:

From the apt-get man page

-s, --simulate, --just-print, --dry-run, --recon, --no-act
          No action; perform a simulation of events that would occur but do
          not actually change the system. Configuration Item:
          APT::Get::Simulate.

          Simulate prints out a series of lines each one representing a dpkg
          operation, Configure (Conf), Remove (Remv), Unpack (Inst). Square
          brackets indicate broken packages with and empty set of square
          brackets meaning breaks that are of no consequence (rare).

so easily take a look into the comand:

apt-get upgrade --dry-run

or

apt-get upgrade -s
| improve this answer | |
  • What means the argument "--just-print"? – ssd_rider May 27 '15 at 7:46
  • same as --dry-run – Maythux May 27 '15 at 7:50
  • 1
    @Maythux --- no need to use sudo if you simulate. Safer ;-) – Rmano May 27 '15 at 10:25

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