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Tips And Tricks

How to backup and restore iptables on Linux systems

February 22, 2014 by Sharad Chhetri 2 Comments

In this post we will learn, how to backup and restore iptables on Linux systems .As a Linux System Administrator,it is important to understand iptables. With iptables,you can secure the Linux Operating System.In this post,we have written a quick way to take backup and restore the iptables in Linux systems. iptables is a user space […]

Filed Under: Linux, Tips And Tricks Tagged With: iptables

Replace keyword with its filename without extension : bash script

February 11, 2014 by Sharad Chhetri Leave a Comment

Today in this example we will use bash script. The task is replace keyword with its filename without extension.To accomplish this task we will use bash script.In bash script we will use for loop and sed command .To elaborate this example,lets assume we have 4 files called file1.txt red.txt blue.txt roger.txt The above each file […]

Filed Under: Tips And Tricks Tagged With: bash script, for loop, sed

Virtual Machine inaccessible status on VirtualBox 4.3

January 26, 2014 by Sharad Chhetri 2 Comments

Problem of the day : Virtual Machine inaccessible status on VirtualBox 4.3 . Today while working in VirtualBox 4.3 ,I got an issue.The Virtual Machine got the status “inaccessible” .After searching in VirtualBox related directories and commands,I finally able to resolve the issue.For resolving this issue,we will use command line.We have another option i.e by […]

Filed Under: Linux, Tips And Tricks Tagged With: virtualbox

This kernel requires an x86-64 CPU but only detected an i686 CPU

January 23, 2014 by Sharad Chhetri 2 Comments

Error : This kernel requires an x86-64 CPU,but only detected an i686 CPU.Unable to boot – please use a kernel appropriate for your CPU . This error is commonly seen when you try to install a new Operating System in Virtual Box.The error occur mostly comes due to user mistake. Before going further ,first check […]

Filed Under: Linux, Tips And Tricks Tagged With: virtualbox

Yum Error database disk image is malformed

January 17, 2014 by Sharad Chhetri Leave a Comment

In this post I am sharing, the troubleshooting step of the error which we found on using linux yum command.Error: database disk image is malformed, we found this problem running the command yum update To resolve this issue run the below given command yum clean dbcache If still issue persist,run below given command yum clean […]

Filed Under: Tips And Tricks Tagged With: yum

How to page scroll up/down in Linux terminal

January 10, 2014 by Sharad Chhetri Leave a Comment

In this tutorial we are sharing the tip.When you are working in Runlevel 3,sometimes you want to scroll up the page.For example,you are editing the the file by using vi editor in Runlevel . Before this you have run some command and got the output which is important. Because you are in Runlevel 3,there is […]

Filed Under: Linux, Tips And Tricks

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