How to install Nagios 4 from source on Ubuntu 14.04 LTS
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How to install Nagios 4 from source on Ubuntu 14.04 LTS

In this tutorial we will learn, how to install Nagios 4 from source on Ubuntu 14.04 LTS. In this practical I have seen some problems while Nagios core 4 installation. Because in Ubuntu 14.04 LTS is shipped with new Apache 2.4 version ,it was quite obvious some extra steps we have to do. I will…

error: The requested URL returned error: 403 Forbidden while accessing Github repo
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error: The requested URL returned error: 403 Forbidden while accessing Github repo

After a long time I created a repo on my Github account.Creating a repo is quite easy on Github, simply login to your account and click on ‘create repo’ button. After creating git repo, now it was time to push all my codes from my desktop to github repo. After cloning the repo into my…

How to print particular line number by using sed command
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How to print particular line number by using sed command

This is a single line sed command to illustrate the example of , ” How to print particular line number by using sed command ” . sed command are the ultimate stream line editor. Often we generally share sed related tips. Given below is content of file called test. Absolute path is /tmp/test This is…

There are unfinished transactions remaining. You might consider running yum-complete-transaction
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There are unfinished transactions remaining. You might consider running yum-complete-transaction

Today while working on CentOS 7, I used yum command to install some packages. But I interrupted the yum command by pressing CTRL + C from keyboard. Which lead me to this error : There are unfinished transactions remaining. You might consider running yum-complete-transaction, or “yum-complete-transaction –cleanup-only” and “yum history redo last”, first to finish…

Install pagespeed module ( mod_pagespeed ) on Apache Web Server : CentOS / RHEL
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Install pagespeed module ( mod_pagespeed ) on Apache Web Server : CentOS / RHEL

The opensource pagespeed module ( mod_pagespeed ) is widely used for speed up the websites. Pagespeed module is available for Apache and Nginx . Currently, to list your website on google top search page , your site must be opened quickly. Hence, speed matters for user end experience also. Now a days, users do not…

How to start / stop / restart / reload  iptables on CentOS 7 / RHEL 7

How to start / stop / restart / reload iptables on CentOS 7 / RHEL 7

On the journey of exploring the newly releaed CentOS 7 . I found another interesting thing. This is related to iptables. In previous CentOS versions, we used to stop iptables service by using the command service iptables stop or /etc/init.d/iptables stop On newly shined CentOS 7 / Red Hat 7 , with systemctl command we…

Setup self signed ssl certificate on Owncloud 6 in Ubuntu 14.04 LTS Server
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Setup self signed ssl certificate on Owncloud 6 in Ubuntu 14.04 LTS Server

In this post we will learn, how to setup self signed ssl certificate on Owncloud 6 in Ubuntu 14.04 LTS Server . The steps are almost same as we have done in post “Setup Owncloud 6 with self signed SSL certificate on Ubuntu 13.10” With the arrival of new Ubuntu version 14.04 LTS, there are…