nmtui

This is a guide to nmtui for CentOS 7 (RHEL 7) nmtui  stands for: Network Manager Text User Interface and it is used for controlling NetworkManager These are the commands: nmtui [ edit | connect | hostname ] [ … …

nmtui – Text User Interface for controlling NetworkManager Read more »

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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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I just have to create a post about installing VirtualBox 5 on CentOS because I haven’t seen a good blog post about it at all. The repository will update it self to newer versions when they are available, on the …

install VirtualBox 5 on CentOS 7 using VirtualBox repository 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 post describes how to add a permanent search domain entry in the resolv.cof of a XenServer Host. Because if you try to manually edit resolv.conf to add search domains the entries are not persistent after the XenServer Host reboot. …

How to Add a Permanent Search Domain Entry in the Resolv.conf File of a XenServer Host 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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If your system have been compromised RedHat has a way to reset the OS back to the base permissions and uid/gids. This is how you do it. Resets uids and gids on files and directories: for i in $(rpm -qa); …

How to reset the OS back to the base permissions and uid/gids Read more »

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