Monday 14 May 2018

How to resolve wget: command not found

wget command: It is a command-line utility and used to downloads files over a network. wget is a free utility to download files and available most of the Linux distributions.

How to rebuild corrupt RPMDB in Centos 6

While, working with rpm or yum package management tools in Centos 6 and getting rpmdb database is corrupted. Follow the below steps to resolve the database issue.

How to change database directory in MySQL server

Sometime, we need to change MySQL data directory due to low space on the file system, save the actual data on any dedicated partition or any network drives and enhance MySQL database performance etc. Mostly in Linux based servers, MySQL uses /var/lib/mysql directory as default data directory. Before do anything, take a cold backup or use MySQL dump to take backup for databases. To change database location please follow these steps:

How to zip and compress a directory/file in Centos7

In this article, we are using tar utility for zipping directory or files. This utility is installed by default on most of Linux distributions. The tar utility is capable to create zip file and compress the same as well.

How to check PHP version in Centos 7

To verify the installation and version of installed PHP by checking the version of PHP using command or inbuilt phpinfo() function in php.

How to zip/unzip the directory in Linux with command line

This article will describe, how to zip and unzip a directory and directory in Linux using command line. Zip is a compression and file packaging utility which is available for Linux, UNIX, Windows and various Operating systems.

How to install zip/unzip package in Linux Centos 7

Zip is a compression and file packaging utility which is available for Linux, UNIX, Windows and various Operating systems. This article will describe, how to install zip/unzip packages in Linux Centos 7.

Saturday 5 May 2018

How to install Nginx web server in Centos 7

Nginx is a free and open source high-performance web server and also it is use for reverse proxy. This article will describe installation of Nginx server on a CentOS 7 using EPEL repository.

How to enable IP masquerading/forwarding on CentOS 7

By default, the IP masquerading/Forwarding is disabled most of the Linux distributions. The IP forwarding is required for LVS router to forward network packets properly to the real servers and it should be enabled on each LVS router node on in the kernel level.

Friday 4 May 2018

How to resolve Clam AV Error while updating virus database

Clam AV fails to start after update to v0.99.4. After the update and getting the below error:

Thursday 3 May 2018

How to fix - ‘Ifconfig’ Command Not Found on CentOS 6.x

The network command line tool ifconfig is not installed by default on CentOS 6 Linux minimal installation. ifconfig command is available for most of the Linux distributions and can be installed from default repository. Follow the below steps to get installed the ifconfig command in centos 6.x.

Wednesday 2 May 2018

How to disable remote SSH login for the root user

By default the root access is enabled for outside world. For security reason it’s not a good idea because any cracker can attempt to brute force your root password and potentially get access to your system if they can figure out your password.
It’s much better to disabling the root user and allowing another regular user with root user’s permissions.

How to add user with sudo privileges in Linux

Add a user with administrative privileges that can ssh into the server and switch to on root user using sudo.