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Re: Detect upgradable packages in shell script ran as a non-root user

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Martin T <m4rtntns@gmail.com> writes:

> Hi,
>
> I would like to run a cron job which periodically checks if I have
> upgradable packages. One way to do it is probably like this:
>
> $ apt-get upgrade -s | grep -q "^0 upgraded"
>
> In case exit code is >0, then there are upgradable packages. The
> second solution I came up with is:
>
> $ for package in $(dpkg-query -f '${binary:Package}\n' -W); do\
>   apt-show-versions -u "$package" &>/dev/null && break;\
> done
>
> Again, if exit code is >0, then there is at least one upgradable
> package. Of course, a solution like "apt-show-versions | grep -q
> "upgradeable"" would also work.
>
> For me the "apt-get upgrade -s | grep -q "^0 upgraded"" seems to be
> the most reasonable solution, but maybe there is even a better way?
>

Does "apt list --upgradable" suit your needs?

Its output format is not stable and it produces a WARNING on stderr if
you use it in a pipe, which might disqualify it for cron usage, but I
use it when I'm check things by hand.

--
regards,
kushal

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Thread

Detect upgradable packages in shell script ran as a non-root user Martin T <m4rtntns@gmail.com> - 2016-11-30 16:10 +0100
  Re: Detect upgradable packages in shell script ran as a non-root user Greg Wooledge <wooledg@eeg.ccf.org> - 2016-11-30 16:20 +0100
    Re: Detect upgradable packages in shell script ran as a non-root user Shin Ice <shin.ice@shinice.net> - 2016-11-30 16:40 +0100
  Re: Detect upgradable packages in shell script ran as a non-root user Liam O'Toole <liam.p.otoole@gmail.com> - 2016-11-30 18:50 +0100
  Re: Detect upgradable packages in shell script ran as a non-root  user Joe <joe@jretrading.com> - 2016-11-30 19:40 +0100
  Re: Detect upgradable packages in shell script ran as a non-root user kushal@locationd.net - 2016-12-01 06:20 +0100
  Re: Detect upgradable packages in shell script ran as a non-root  user Tixy <tixy@yxit.co.uk> - 2016-12-02 09:00 +0100
    RE: Detect upgradable packages in shell script ran as a non-root  user Bonno Bloksma <b.bloksma@tio.nl> - 2016-12-02 12:40 +0100
  Re: Detect upgradable packages in shell script ran as a non-root user Jonathan Dowland <jmtd@debian.org> - 2016-12-02 12:50 +0100

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