FirewallD

Fast commands for enabling firewalld on RHEL7 and CENTOS7. I had to enable these for a secondary control on a project I am on. Check the Status of the Firewall on Each Machine and confirm firewalld is started. systemctl status firewalld ‚óŹ firewalld.service – firewalld – dynamic firewall daemon    Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor […]

VirtualBox Additions missing

If you see Kernel Headers not found for target kernel level when installing the VBoxLinuxAdditions.run “Please install them and execute”. This issue was found on centos. You’ll see the commands below: yum install “kernel-devel-uname-r ==$(uname -r)” References https://unix.stackexchange.com/questions/232147/your-kernel-headers-for-kernel-3-10-0-229-el7-x86-64-cannot-be-found