CentOS 8
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Initial Settings : Add Additional Repositories
2019/09/25
 
Add some useful external repositories to install useful softwares.
[1] Add EPEL that Fedora project provides packages which are specially built for RHEL.
⇒ https://fedoraproject.org/wiki/EPEL
[root@dlp ~]#
dnf -y install epel-release
[root@dlp ~]#
vi /etc/yum.repos.d/epel.repo
[epel]
name=Extra Packages for Enterprise Linux $releasever - $basearch
#baseurl=https://download.fedoraproject.org/pub/epel/$releasever/Everything/$basearch
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-$releasever&arch=$basearch&infra=$infra&content=$contentdir
failovermethod=priority
# [enabled=1] = repository enabled, [enabled=0] = repository disabled
enabled=1
# to add [priority=*], it can set priority to repository
# it can specify [1-99], [1] is highest, default without the line is [99]
priority=10
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-$releasever

.....
.....

# if disabling with [enabled=0] regulary but want to enable it temporary, run like follows

[root@dlp ~]#
dnf --enablerepo=epel install [packages]

[2] Add ELRepo that provides mainly drivers for RHEL.
⇒ https://elrepo.org/tiki/tiki-index.php
[root@dlp ~]#
dnf -y install elrepo-release
[root@dlp ~]#
vi /etc/yum.repos.d/elrepo.repo
[elrepo]
name=ELRepo.org Community Enterprise Linux Repository - el8
baseurl=http://elrepo.org/linux/elrepo/el8/$basearch/
        http://mirrors.coreix.net/elrepo/elrepo/el8/$basearch/
        http://jur-linux.org/download/elrepo/elrepo/el8/$basearch/
        http://repos.lax-noc.com/elrepo/elrepo/el8/$basearch/
mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo.el8
# [enabled=1] = repository enabled, [enabled=0] = repository disabled
enabled=1
# to add [priority=*], it can set priority to repository
# it can specify [1-99], [1] is highest, default without the line is [99]
priority=10
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

.....
.....

# if disabling with [enabled=0] regulary but want to enable it temporary, run like follows

[root@dlp ~]#
dnf --enablerepo=elrepo install [packages]

[3] Add Remi's RPM repository that provides useful packages like latest PHP and so on.
⇒ https://rpms.remirepo.net/
[root@dlp ~]#
dnf -y install https://rpms.remirepo.net/enterprise/remi-release-8.rpm
# included repository files

[root@dlp ~]#
rpm -ql remi-release

/etc/pki/rpm-gpg/RPM-GPG-KEY-remi
/etc/pki/rpm-gpg/RPM-GPG-KEY-remi.el8
/etc/pki/rpm-gpg/RPM-GPG-KEY-remi2017
/etc/pki/rpm-gpg/RPM-GPG-KEY-remi2018
/etc/pki/rpm-gpg/RPM-GPG-KEY-remi2019
/etc/yum.repos.d/remi-glpi91.repo
/etc/yum.repos.d/remi-glpi92.repo
/etc/yum.repos.d/remi-glpi93.repo
/etc/yum.repos.d/remi-glpi94.repo
/etc/yum.repos.d/remi-modular.repo
/etc/yum.repos.d/remi-php72.repo
/etc/yum.repos.d/remi-php73.repo
/etc/yum.repos.d/remi-php74.repo
/etc/yum.repos.d/remi-safe.repo
/etc/yum.repos.d/remi.repo

# only [remi-safe] and [remi-modular] are enabled by default

[root@dlp ~]#
grep 'enabled=1' /etc/yum.repos.d/remi-*

/etc/yum.repos.d/remi-modular.repo:enabled=1
/etc/yum.repos.d/remi-safe.repo:enabled=1
[root@dlp ~]#
vi /etc/yum.repos.d/remi-safe.repo
[remi-safe]
name=Safe Remi's RPM repository for Enterprise Linux 8 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/8/safe/$basearch/
#mirrorlist=https://rpms.remirepo.net/enterprise/8/safe/$basearch/httpsmirror
mirrorlist=http://cdn.remirepo.net/enterprise/8/safe/$basearch/mirror
# [enabled=1] = repository enabled, [enabled=0] = repository disabled
enabled=1
# to add [priority=*], it can set priority to repository
# it can specify [1-99], [1] is highest, default without the line is [99]
priority=10
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi.el8

.....
.....

# if disabling with [enabled=0] regulary but want to enable it temporary, run like follows

[root@dlp ~]#
dnf --enablerepo=remi-safe install [packages]
# also possible to use Moduler Repository

[root@dlp ~]#
dnf --enablerepo=remi-modular --disablerepo=AppStream module list

Remi's Modular repository for Enterprise Linux 8 - x86_64
Name  Stream       Profiles                   Summary
glpi  9.3          common [d]                 Free IT asset management software
glpi  9.4          common [d]                 Free IT asset management software
php   remi-7.2     common [d], devel, minimal PHP scripting language
php   remi-7.3     common [d], devel, minimal PHP scripting language
php   remi-7.4     common [d], devel, minimal PHP scripting language
redis remi-5.0 [d] common [d]                 Redis persistent key-value database

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
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