On 10/02/2017 07:07 PM, david wrote:

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On 10/02/2017 06:24 PM, david wrote:

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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.Â

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.

There is a java-1.7.0-openjdk-devel or java-1.7.0-openjdk-devel, but no java-devel

True, but then how does "yum install java-devel" know what to install without a package by that name?  I thought that the "yum install" command took package (or group) names.

And sorry about the error in my rpm command; I meant it without the "yum" in front of it. David

Packages have 'names' and they also have 'Provides'.

To see the things that java-1.7.0-openjdk-devel provides, you can use this command:

rpm -qp --provides java-1.7.0-openjdk-devel-1.7.0.151-2.6.11.1.el7_4.x86_64.rpm

This is the output: application() application(java-1.7.0-openjdk-1.7.0.151-2.6.11.1.el7_4.x86_64-jconsole.desktop)

application(java-1.7.0-openjdk-1.7.0.151-2.6.11.1.el7_4.x86_64-policytool.desktop)

java-1.7.0-devel = 1:1.7.0.151 java-1.7.0-openjdk-devel = 1:1.7.0.151-2.6.11.1.el7_4 java-1.7.0-openjdk-devel(x86-64) = 1:1.7.0.151-2.6.11.1.el7_4 java-devel = 1:1.7.0 java-devel-openjdk = 1:1.7.0.151 java-sdk = 1:1.7.0 java-sdk-1.7.0 = 1:1.7.0.151 java-sdk-1.7.0-openjdk = 1:1.7.0.151 java-sdk-openjdk = 1:1.7.0.151 lib.so(SUNWprivate_1.1)(64bit) libjli.so()(64bit) libjli.so(SUNWprivate_1.1)(64bit)

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yum install or yum update can be used with either a provide or a name .. list only works with names.