The ifconfig and netstat utilities has been marked as deprecated in the man pages for CentOS 5 and 6 for nearly a decade.  Redhat made the decision to no longer install the net-utils package by default in CentOS 7. The …

net-utils package deprecated ss and ip is the replacement commands for RHEL / CentOS / Fedora 7 Read more »

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This time I want to explain firewalld for those that are new to CentOS 7 and like me are only used to iptables. This first blogpost is just a rewrite of the manual page for firewalld. This post is the …

Part – 1 firewalld – Dynamic Firewall Manager Explained ( CentOS 7, RHEL 7, Fedora) Read more »

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If you need to generate a SHA512 encrypted password for kickstart or perhaps for bootstrapping you servers with automation tools like ansible you can do this easily with python. python -c ‘import crypt,getpass; print(crypt.crypt(getpass.getpass(), crypt.mksalt(crypt.METHOD_SHA512)))’ If you have python below …

Generate SHA512 password with CentOS 7,FEDORA 7, RHEL 7 Read more »

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So you are staring with Automation, Then I recommend you to install Ansible from the EPEL repository. It super easy so I will not create a huge blog post about this. Requirements before we install Ansible with yum is of …

Installation instructions to install Ansible with yum on CentOS 7.x, RHEL 7.x, Fedora 7.x Read more »

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What is EPEL? EPEL (Extra Packages for Enterprise Linux) is a volunteer-based community effort from the Fedora project to create a repository of high-quality add-on packages that complement the Fedora-based Red Hat Enterprise Linux (RHEL) and its compatible spinoffs, such …

Install the EPEL repository on CentOS 7.x, RHEL 7.x, Fedora 7.x Read more »

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This is a quick guide to configure the DHCP Clinent for RHEL / CentOS / Fedora. I’m using CentOS 6.5 RHEL / CentOS / Fedora Linux DHCP Client Configuration Open configuration file, enter: # vi /etc/sysconfig/network-scripts/ifcfg-eth0 Append hostname, enter: DHCP_HOSTNAME=ComputerName …

RHEL / CentOS / Fedora Linux DHCP Client Configuration Read more »

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The information below is taken directly from the man page hier(7) A typical Linux system has, among others, the following directories: / This is the root directory. This is where the whole tree starts. /bin This directory contains executable programs …

Description of the Linux file system hierarchy Read more »

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If your system is behind a ISA proxy you need to do the following to get yum to work properly. Step one: Download the cntlm rpm package For 64 Bit CentOS 6.x ftp://rpmfind.net/linux/epel/6/x86_64/cntlm-0.35.1-4.el6.x86_64.rpm For 32 Bit CentOS 6.x ftp://rpmfind.net/linux/epel/6/i386/cntlm-0.35.1-4.el6.i686.rpm Step …

how to use yum through ISA proxy using Active Directory account Read more »

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I have had to fix a lot of Linux machines that we have outsourced the hosting on because that the hosting partners Linux specialists can’t set up the system correctly that’s why I am going to do a series of …

Recommended System Swap Space RHEL 6.x / CentOS 6.x / Fedora 6.x Read more »

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