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August 3, 2016

How to update Kernel version on Centos 7

To update latest kernel version on Centos 7

Linux kernel is one of the largest open source project with upgrading versions. Updating the latest kernel version on Centos 7 is explained in this manual

Check the current kernel version using the following command.

[root@linuxhelp ~]# uname -r 3.10.0-123.el7.x86_64

Add the EPEL GPG key to enable the EPEL repository and EPEL repo fastest mirror using the below command.

[root@linuxhelp ~]# rpm --import

Before installation process enable the epel repo using following command.

[root@linuxhelp ~]# rpm -Uvh [...]
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July 28, 2016

Light weight Text Editor tools in Linux

Light weight Text Editor tools

In this tutorial we will learn, how to install Light weight Text Editor tools.


CherryTree is a note-taking editor tool that organises the notes into the hierarchical tree. It supports text formatting. It is written in GTK2 or Python language. Features

Supports the Rich text. Supports multi programming languages Saves images as png format Saves the embedded files to disk Multi-level lists handling is supported. Supports table creation and imports/expports tables as csv format. To install Cherrytree

Add the cherrytree package into repository by using the following command.

root@linuxhelp:/home/user1# add-apt-repository [...]
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July 22, 2016

Route Command in linux with examples

Route Add Command in Linux with examples

Routing is the basic design for internet protocol. This protocol helps in transferring packet to the right machines. A router controls the traffic and sends packet to the destination network. Route add command in Linux is explained in this article with an example.

Options -A is used to specify the specific address family. -F option is used for the kernel’s FIB  routing table. -C option is used to operate the kernel’s routing cache.

-v option is used for verbose operation. -n  displays the numerical addresses. -e option is used to display the routing table in netstat-format. -arp Manipulate the system ARP [...]

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July 21, 2016

How to create Multiple IP Address to Single Network interface

To create Multiple IP Address to Single Network interface

Creating multiple IP address using a single network interface is known as IP aliasing. Aliasing does not require any additional adaptors.This makes aliasing more cost effect. Procedure to create Multiple IP Address to a single interface is explained in this article.

To Assigning multiple IP’s on a single network interface

Navigate to the path where the network configuration files are placed by utilising the following command.

[root@linuxhelp ~]# cd /etc/sysconfig/network-scripts/ [root@linuxhelp network-scripts]# ll total 224 -rw-r--r-- 5 root root 256 Jul 15 18:25 ifcfg-eth0 -rw-r--r-- 1 root root 254 [...]
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July 18, 2016

How to Install Linux Kernel 4.5 in Ubuntu

How to Install Linux Kernel 4.5 in Ubuntu

Linux kernel is an important part in Linux operating system which allocates resources, security, low-level hardware interfaces, file management, etc., The procedure to install Linux Kernel 4.5 in Ubuntu is explained in this article.

To install Linux Kernel 4.5

Before updating the kernel, check the kernel by using the uname command.

root@linuxhelp:~# uname -mrs Linux 4.2.0-27-generic x86_64

Create a directory by using the following command.

root@linuxhelp:~# mkdir -p linux-4.5/generic root@linuxhelp:~# cd linux-4.5/generic/ root@linuxhelp:~/linux-4.5/generic#

Download the package by executing the following [...]

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July 14, 2016

Top Editor tools in Ubuntu

Top Editor Tools in Ubuntu Distribution

In this tutorial we are going to show some editor or source code tool for Ubuntu distribution.


Emacs is the most popular code editors on Linux. It is a powerful, self-documenting editor, and customisable .

Installation of emac root@linuxhelp:~# apt-get install emacs Reading package lists... Done Building dependency tree Reading state information... Done . . . Setting up emacs (46.1) ... Processing triggers for libc-bin (2.21-0ubuntu4) ...

Open the emacs editor tool by using the following command.

root@linuxhelp:~# emacs


Geany is a text editor which uses the GTK+ toolkit in an [...]

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June 25, 2016

How to clear RAM Memory Cache, Buffer & Swap Space on Linux

Clearing RAM Memory Cache, Buffer and Swap Space on Linux

Memory management like Clear RAM Memory Cache, Buffer and Swap Space in Linux will be discussed in this article.

To Clear Cache in Linux

Generally all the Linux System will have three options to clear cache without interrupting any services or processes.

To Clear PageCache only [root@linuxhelp ~]# free -h total used free shared buffers cached Mem: 987M 923M 64M 5.1M 0B 240M -/+ buffers/cache: 682M 304M Swap: 2.0G 15M 1.9G [root@linuxhelp ~]# sync; echo 1 > [...]
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June 22, 2016

How To Set Email Alerts for SSH Root Login In Linux

To Set Email Alerts for SSH Root Login In Linux

While configuring Linux server, make sure that you should get a notification if any unauthorised login into root user. The server admin should get all email alerts from server. The procedure to set email alerts for SSH root login in Linux is explained.

Install the mailx package

Execute the following command to install mailx package.

[root@linuxhelp ~]# yum install mailx Loaded plugins: aliases, changelog, fastestmirror, kabi, presto, refresh-packagekit, security, tmprepo, : verify, versionlock Loading support for CentOS kernel ABI Setting up Install Process Loading mirror speeds from cached hostfile * [...]
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June 18, 2016

sudo command in Linux with examples

Configuring sudo command.

Configuring sudo command and the difference between “su” & “sudo” in Linux distributions is discussed in this article.

The major difference between “su” and “sudo” is, the first compels you to share the root password to other users whereas “sudo” allows you to run commands without root passwords.

Switch to root user, enter the following command in the terminal.


user1@linuxhelp:~$ su Password: root@linuxhelp:/home/user1# To Install “sudo” 

By using the following command install “sudo”

root@linuxhelp:/home/user1# apt-get install [...]
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June 18, 2016

How to use usermod command to manage user account

To use Usermod command for managing user account

Usermod command is used to change the home directory of existing user, login name, login shell, comment of passwd file etc. The files that may be affected during this operation are /etc/passwd (user account information), /etc/shadow (secure account information) and /etc/group (group information). Only root/super user can use this command.

Adding the information to user [root@linuxhelp Desktop]# usermod -c "Hello user" linuxhelp

The option ‘-c’ with usermod is used to set the information to the user. After adding the information to the user you view the status in /etc/passwd file.

[root@linuxhelp Desktop]# grep -E --color [...]