Re: Detect upgradable packages in shell script ran as a non-root user
On 2016-11-30, Martin T <m4rtntns@gmail.com> wrote:
> 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.
'apt-show-versions -u | wc -l' is another option.
>
> 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?
>
>
> thanks,
> Martin
>
>
--
Liam
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