> Date: Monday, October 02, 2017 16:24:20 -0700
> From: david <david@xxxxxxxx>
>
> Folks
>
> I performed an install of "java-devel". Several packages got
> installed. So far so good.
>
> Yet, when I performed
> yum list installed | grep java-devel
> and also
> yum rpm -qa | grep java-devel
>
> it did not show up as already installed.
>
> This behavior appears both on Centos7 and Centos6. This bothers me
> because as a time-saving effort, I maintain the last output of "yum
> list installed" and quickly determine whether it's worth running
> yum. True, yum would "do nothing", but that takes several seconds.
>
> Is there some simple explanation? It works for all the other
> packages I've installed.
>
> David
>
What gets installed with a "yum install java-devel" command is:
java-1.8.0-openjdk-devel.x86_64
which is why your "yum list installed | grep java-devel" doesn't find
it. If you did, instead, "yum list installed | grep java | grep
devel" it would work.
Your "yum rpm -qa | grep java-devel" isn't a valid yum option. The
correct command:
rpm -qa | grep java-devel
would fail to find it for the same reason your "yum list" command did.
Try instead:
rpm -qa java\* | grep devel
that should turn it up:
java-1.8.0-openjdk-devel.x86_64 1:1.8.0.144-0.b01.el7_4 @updates
Your /var/log/yum.log shows the names of the packages installed,
which can help if there is confusion.
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