I was playing with dialog, the nCurses-like packages that allows one to create Text User Interfaces (TUI) for bash scripts. I banged out a TUI that allows a firewalld user to reload and then view firewall changes after editing them with firewall-cmd. You can download it from: https://github.com/linuxhistoryblg/adminscripts set it executable and place it anywhere […]
RedHat’s virtualization solution known as the Kernel Virtualization Module, or KVM is quite useful. KVM makes it possible to operate several virtual guest operating systems concurrently with relatively modest host hardware. Any given guest VM could then be used as an http server, a mail server, or even a directory server like OpenLDAP or FreeIPA. […]
If you’ve still got some RHEL 6.x systems in your environment and you need them to share directories via NFS you may struggle as I did to find all the settings for turning on services and opening up ports. Here’s a step by step walkthrough of what I did: First take note of your server […]
Booting into single user mode was the prescribed method for recovery prior to the advent of systemd, (Pre-RHEL7). Recovery in a modern Linux environment requires booting the ramdisk image and chrooting into your root filesystem to make the change. If you’ve forgotten the root password on your RHEL/CentOS/Fedora machine and have physical access to the […]
