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I want to install a HP CLI utility so I first check the dependencies and find out that something called rpmlib is needed :

[root@centos2 ~]# rpm -qRp hp-health-10.30-1752.15.rhel7.x86_64.rpm | grep rpmlib rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1 rpmlib(PayloadIsXz) <= 5.2-1

I check if I have it already installed but can't find it :

[root@centos2 ~]# rpm -qa | grep -i rpmlib [root@centos2 ~]# yum list installed | grep -i rpmlib [root@centos2 ~]#

I try to install anyway with yum and the package is installed without any problems and depedencies missing. 

[root@centos2 ~]# yum list installed | grep -i hp hp-health.x86_64 10.30-1752.15.rhel7 installed

Why?

I would like to know if it is possible that a package be installed on a system but not found when using rpm or yum commands?

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2 Answers 2

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rpmlib() dependencies specify capabilities provided by rpm itself, not actual packages. The version of the requirement represents the version of rpm that first had the named capability.

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  • Ok I understand about rpmlib thanks. However, that doesn't answer my last question. Commented Nov 23, 2017 at 11:31
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    You can extract the files from a package and place them manually, but it isn't "installed" unless rpm knows about it. Commented Nov 23, 2017 at 11:32
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    @Pozinux You could basically remove an installed rpm package just from rpms database, the actual files in that package would still be in place but the package would not be considered "installed" anymore. Refer to rpms --justdb option. Commented Dec 2, 2017 at 16:08
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You can easily display which package provides this dependency using:

# rpm -q --whatprovides 'rtld(GNU_HASH)' glibc-2.26-16.fc27.x86_64 glibc-2.26-16.fc27.i686

or:

$ LC_ALL=C sudo dnf whatprovides 'rtld(GNU_HASH)' Last metadata expiration check: 0:03:39 ago on Sat Nov 25 12:40:10 2017. glibc-2.26-16.fc27.x86_64 : The GNU libc libraries Repo : @System Matched from: Provide : rtld(GNU_HASH) glibc-2.26-16.fc27.i686 : The GNU libc libraries Repo : @System Matched from: Provide : rtld(GNU_HASH) glibc-2.26-16.fc27.i686 : The GNU libc libraries Repo : updates Matched from: Provide : rtld(GNU_HASH) glibc-2.26-16.fc27.x86_64 : The GNU libc libraries Repo : updates Matched from: Provide : rtld(GNU_HASH) glibc-2.26-15.fc27.i686 : The GNU libc libraries Repo : fedora Matched from: Provide : rtld(GNU_HASH) glibc-2.26-15.fc27.x86_64 : The GNU libc libraries Repo : fedora Matched from: Provide : rtld(GNU_HASH)

More about capabilities (aka Virtual Provides) can be found here: https://docs-old.fedoraproject.org/en-US/Fedora_Draft_Documentation/0.1/html/RPM_Guide/ch-advanced-packaging.html#id818305

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