Kristina Somolyar

Juniper vs Cisco vs Nokia(formerly Alcatel) SR show commands

Juniper vs Cisco vs Nokia(formerly Alcatel) SR show commands

Most of the companies have multi-vendor routers in their network. In order to make troubleshooting easy we would like to list down shows commands of Juniper, Cisco and Nokia (Formerly Alcatel) Service Router in this post.

OSPF Commands:

BGP Commands:

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Welcome to Dubai (AWS Devops course)

It gave me great pleasure to make the trip to Dubai and provide one of the most significant courses on cloud computing, in particular for devops.

CentOS Repo List: Working URLs

This knowledge base serves as an easy-to-follow guide for configuring repository URLs for CentOS 7 and CentOS 8. It uses repository lists from the CentOS vault mirror, ensuring that these repositories remain accessible even after the OS has reached its end of life. Ideal for system administrators, developers, and CentOS enthusiasts, this guide guarantees effortless access to repository URLs for BaseOS, AppStream, Extras, CentOSPlus, and more, ensuring your CentOS machines are properly configured.

How to Configure a Repo in CentOS?

Before modifying the repository files, ensure you have appropriate backup procedures in place:

sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

Editing Repository Files:

To modify the repository sources, open the respective repository configuration file (/etc/yum.repos.d/CentOS-Base.repo) using your preferred text editor:

sudo vi /etc/yum.repos.d/CentOS-Base.repo

eplace the content in the file with the configurations listed below based on your CentOS version.

CentOS 7

To configure the working repositories for CentOS 7, add the following to your /etc/yum.repos.d/CentOS-Base.repo file:

[base]
name=CentOS-$releasever - Base
baseurl=https://vault.centos.org/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[updates]
name=CentOS-$releasever - Updates
baseurl=https://vault.centos.org/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[extras]
name=CentOS-$releasever - Extras
baseurl=https://vault.centos.org/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[centosplus]
name=CentOS-$releasever - CentOSPlus
baseurl=https://vault.centos.org/7.9.2009/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=0

CentOS 8

To configure the working repositories for CentOS 8, add the following to your /etc/yum.repos.d/CentOS-Base.repo file:

[baseos]
name=CentOS Linux $releasever - BaseOS
baseurl=https://vault.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[appstream]
name=CentOS Linux $releasever - AppStream
baseurl=https://vault.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[extras]
name=CentOS Linux $releasever - Extras
baseurl=https://vault.centos.org/$contentdir/$releasever/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[centosplus]
name=CentOS Linux $releasever - Plus
baseurl=https://vault.centos.org/$contentdir/$releasever/centosplus/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial