Category Archives: Linux

Linux (IPA pronunciation: /ˈlɪnʊks/) is a Unix-like computer operating system. Linux is one of the most prominent examples of free software and open source development; its underlying source code can be freely modified, used, and redistributed by anyone.

How to Add the EPEL Repository in RHEL/CentOS 5/6

Posted on by
Reply

EPEL (Extra Packages for Enterprise Linux) is a third party RPM repository for Red Hat Enterprise Linux and CentOS. This article describes how to add the EPEL repository in Red Hat Enterprise Linux and CentOS 5 or 6.
Install EPEL1. Install the EPEL package using the command below.

rpm -Uvh http://bit.ly/q7kHBq

NoteThe full link for the RHEL 6 EPEL package and the links for the lower versions of RHEL are provided below. The rpm command prior to RHEL 6 cannot handle http redirects so no bit.ly links have been provided.

http://download.fedora.redhat.com/pub/epel/6/i386/epel-release-6-5.noarch.rpm

http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm

http://download.fedora.redhat.com/pub/epel/4/i386/epel-release-4-10.noarch.rpm

yum repolist2. Verify the installation using the command below. You should see epel in the output.

yum repolist

install yum priorities3. Install the Yum priorities package using the command below.

yum install yum-priorities

edit epel.repo4. Edit the file /etc/yum.repos.d/epel.repo and add the line below under the [epel] section.

priority=10

yum check update5. Test your configuration using the command below. You should see a priority protections message in the output.

yum check-update

Linux defacements and Linux hacking

Posted on by
Reply

Zone-h.org has an excellent site to see defacements and what is going on across the internet.   Reviewing the archives and live defacements, Linux is defaced (hacked) more times than Windows.   What exactly does this mean?  Is Linux unsafe?  Not at all.  It truly falls on the administrator who configured Linux.   There is a false sense of security when you install Linux based on all of the sites and forums that support Linux’s ability to be safe and reliable.   Truly it can be the safest if the following holds true -

  • Proper configuration
  • Updates
  • Reading materials
  • Frequent penetration tests
  • Monitoring and logging
  • Experience with advanced configurations

Zone-h archives

All operating systems have vulnerabilities.  And yes Apple, Microsoft and Linux is only as safe as the end user.

Install Curl Extension for PHP in Ubuntu

Posted on by
Reply

Many times we come across web applications which are written in PHP and require curl extension. PHP curl functions can used through use of libcurl. The libcurl was create by Daniel Sternberg. With the help of libcurl you can connect and communicate with webserver using different protocols. To install curl library on your Ubuntu computer, you need to have LAMP (Linux apache mysql php) set up ready. Once you have Lamp setup ready just type in following command in terminal to install curl library,

sudo apt-get install curl libcurl3 libcurl3-dev php5-curl

After installing libcurl you should restart the web server with following command,

sudo /etc/init.d/apache2 restart

If you don’t have LAMP functionality already installed, then please click on the following link to find out how install LAMP on Ubuntu Linux,