yum commands

Install a software with yum

Uninstall a software

Example for installing php and GD

When you need to update all install software, run

List all available software

List all installed software

See yum […]

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EPEL – Extra Packages for Enterprise Linux

EPEL (Extra Packages for Enterprise Linux) provide additional software for CentOS and RHEL. You can find more information about EPEL at http://fedoraproject.org/wiki/EPEL On CentOS 7/8, you can enable EPEP repo with command

Or just download rpm package from the site and install. RHEL/CentOS 6:

RHEL/CentOS 7:

RHEL/CentOS 8:

See CentOS, yum […]

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yum [Errno 5] [Errno 2] No such file or directory

When running yum update on CentOS 7 server, i get following error

Someone had tried to install differnt version of python on this server. That caused this problem. When i run urlgrabber-ext-down, i get error saying python missing.

Problem fixed by creating symlink

See yum […]

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Install Vagrant on CentOS

To install Vagrant on CentOS, go to https://www.vagrantup.com/downloads Get link to latest version, then run “rpm -ivh URL_TO_RPM_FILE”. At time of writing this post, latest Vagrant version is 2.2.9, to install Vagrant 2.2.9, run

To check Vagrant version

See Vagrant […]

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Install bind in CentOS 7

bind is a DNS server. To install bind on CentOS 7, run

Enable bind to start on boot

Start bind

You can see status with

Setup firewall You need to allow DNS ports UDP/TCP 53 in firewall. On CentOS 7, you can run

Configure bind By default bind only listens […]

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yum list all available packages in a repo

To list all packages available on a specific repo, run

Example:

This command list all packages available in repo “litespeed” […]

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Install PHP 7 on CentOS VestaCP

To install PHP 7. you need to first enable epel and remi repo.

Remove existing PHP

Install PHP 7.3

start php-fpm

Set php 7.3 as default PHP for cli

Restart apache

[…]

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rpm verify packages

To verify a package installed on system, you can use

Example

Here bind package have /etc/named.conf file modified. To verify all packages on system, run

[…]

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CentOS 7 resolv.conf make changes permanent

On rebooting CentOS 7 server, changes made to resolv.conf is lost. This is becaise one of the network interface is configured to use DNS server.

To fix, edit

Remove the line

Now NetworkManager will not modify /etc/resolv.conf file on boot. Or you can set valid DNS servers in network config file like […]

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