====== Disable a repo ======
<color #db5f0b>Feb 2021</color>
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===== Introduction =====

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repo files, in CentOS are located in <color #00a2e8>'/etc/yum.repo.d'</color>. These files hold information (URLs) about where repositories are for CentOS programs (tcpdump, htop, nload etc.)
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Each repo has it's own file, <color #00a2e8>CentOS-Base.repo</color>, <color #00a2e8>epel-release.repo</color> etc.
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Occasionally we might want to ignore or remove a repo file, in this example there is a repo file called <color #00a2e8>cdrom.rep</color>o that I need to ignore/delete.
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To temporarily ignore a repo, we can use the following syntax:
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<color #00a2e8>sudo yum disablerepo=cdrom install yum-utils -y</color>
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This is two commands combined. <color #00a2e8>sudo yum install yum-utils -y</color> and <color #00a2e8>yum disablerepo=cdrom</color>.
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This allows us to install <color #00a2e8>yum-utils</color> while telling CentOS to ignore repositories listed in the <color #00a2e8>cdrom.repo</color> file.
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If we wish to disable a repo permanently then we can use the following syntax:
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<color #22b14c>sudo yum-config-manager --disable cdrom</color>
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This will tell <color #22b14c>yum-config-manage</color>r to disable the repo file <color #22b14c>cdrom</color> (note we do not require the .repo extension)
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For this to work the <color #22b14c>yum-config-manager</color> must have been installed <color #22b14c>(yum install yum-config-manager)</color>.
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