rhel5 Archives - Michael Altfield's Tech Blog

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Nightmare on Lemmy Street (A Fediverse GDPR Horror Story)

Hardening Guide for phpList

Trusted Boot (Anti-Evil-Maid, Heads, and PureBoot)

Introducing BusKill: A Kill Cord for your Laptop

WordPress Profiling with XHProf (Debugging & Optimizing Speed)

Detecting (Malicious) Unicode in GitHub PRs

WordPress Multisite on the Darknet (Mercator .onion alias)

Continuous Documentation: Hosting Read the Docs on GitHub Pages (2/2)

Crowdfunding on Crowd Supply (Review of my experience)

xen hung at “Checking for hardware changes”

By Michael Altfield, on August 13th, 2009

So, xen is really beginning to piss me off. I turned off all my machines to do a snapshot, and when I tried to bring them back up, they were all in the ‘blocked’ state. Upon further investigation (using virt-manager/xm console), I found that they were hung at the “Checking for hardware changes” item in their boot process. This could be a CentOS/RHEL 5 issue, but I’m putting my money on xen.

Michael Altfield

Hi, I’m Michael Altfield. I write articles about opsec, privacy, and devops ➡

About Michael

. . . → Read More: xen hung at “Checking for hardware changes”

Enabling SELinux strict on RHEL5

By Michael Altfield, on July 6th, 2009

I’ve been playing around with SELinux at work recently. Not surprisingly, I was struggling to get SELINUXTYPE=strict to work properly. Unfortunately, all “google results for ‘enabling selinux strict’ would return were dead ends. People would enable selinux strict, kernel panic, and ‘fix’ it by disabling selinux.

Well, a co-worker of mine *was* able to successfully enable selinux’s strict policy on RHEL5 (CentOS 5). He gave me this guide to post to the world for others to see how (thanks Mykola):

Michael Altfield

Hi, I’m Michael Altfield. I write articles about opsec, privacy, and devops ➡

About Michael

. . . → Read More: Enabling SELinux strict on RHEL5

Install “build-essential” on RHEL/CentOS and OpenSolaris

By Michael Altfield, on June 13th, 2009

Debian

If you want to be able to compile packages in debain/ubunutu, you can issue the following command:

apt-get install build-essential

Red Hat

If you want to be able to compile packages in red hat/centos, you can issue the following command:

yum install make gcc gcc-c++ kernel-devel

…or, if you don’t care about maintaining a small footprint, you can get *all* of the development packages (including X devs–eww):

yum groupinstall "Development Tools"

Open Solaris

If you want to be able to compile packages in open solaris, you can issue the following command:

pkg install SUNWgcc Michael Altfield

Hi, I’m Michael Altfield. I write articles about opsec, privacy, and devops ➡

About Michael

tech.michaelaltfield.net/

Clone Xen RHEL5 (CentOS 5.2) VM

By Michael Altfield, on June 13th, 2009

Hello world! I just updated my whole server environment and, my, things are looking good. Anyway, I had to run through these steps a half dozen times, so I thought I would post it here for myself and (maybe even) others.

Here’s the commands I ran to turn a clone of my base RHEL5 (CentOS 5.2) Xen image into another working virtual machine on my RHEL5 (CentoOS 5.2) Xen Host:

Michael Altfield

Hi, I’m Michael Altfield. I write articles about opsec, privacy, and devops ➡

About Michael

tech.michaelaltfield.net/