Category Archives: Computers

In the boot process. While I certainly know how things work, the RH7 boot process is a tad different with grub2 and systemd vs grub and init. Startup process on 6 and earlier is pretty simple. After the BIOS or … Continue reading →

Continuing on Chapter 4 finds firewall configuration and selinux. Firewalls are something I’ve dealt with before over the years. In general they’re pretty simple but you do need to understand what you’re doing in order to properly set up a … Continue reading →

I decided to check out the new ‘*ctl’ features of RH7 and found a few new things in addition to systemctl and journalctl. bootctl – Manages the boot loader and firmware. ‘status’ tells the status of the boot loader. On … Continue reading →

This is more of a permissions and security chapter. First off are file permissions. Executable, sticky bits, etc. Interesting that you cannot set umask to create executable files by default. The parts I’ll need to remember are the various special … Continue reading →

Second day of poking about at certification. I’m studying the Red Hat 6 exam but have a dual environment set up. Three CentOS 6.6 virtual servers and three CentOS 7.0 servers. It lets me look at what the book is … Continue reading →

One of the things I’m tasked with at work is to be the point man for patch management on the Red Hat/CentOS infrastructure. A daunting task in part because patching, unless under critical circumstances, is almost impossible. It takes months … Continue reading →