Here are some speed results for RAM according to Memtest86+ on some machines that I have run. Note that the reported speed varies between runs by a few percent. Thinkpad 600e PentiumII 400Mhz PC-66 RAM (2 DIMMs) 174MB/s Compaq P3-866MHz PC133 RAM (3 DIMMs, 2*128 + 256) 190MB/s Compaq Athlon 1GHz PC133 RAM (3 DIMMs) […]

Here are the details of some Mon tests I run: DNS The following tests the local DNS cache. I didn’t use example.com in my real tests, I used the domain of a multi-national corporation that has a very short DNS timeout that seems related to their use of the Akamai CDN. I won’t tell people […]

Here is a list of the Debian repositories I maintain. I include sources.list lines both directly and via a TOR Hidden Service (see Petter’s blog post about TOR and APT [1]). All my repositories support i386 and amd64 architectures. Not all packages will be supported in both architectures. In the past I’ve had to rebuild […]

This post has a list of educational apps for Android phones and tablets that I have discovered. I can’t claim that each app is the best for it’s purpose, but I’ve tested out each one and found it to be useful. I am separating the lists into apps that have full functionality when offline and […]

Here is a list of Android games that involve thinking: Chess Unblock Me – the classic game of moving blocks to slide a block out Go – Japanese board game Minecraft Pocket Edition Cut the Rope games The Sims Freeplay Monument Valley Bad Piggies Engineer: Cars Stone Flips (like Lights Out) The Room

Free root access on a SE Linux machine! To access my Debian play machine ssh to zp7zwyd5t3aju57m.onion as root, the password is “SELINUX“. I give no-one permission to distribute this password. If you want to share information on this machine you must give the URL to this web site. In some jurisdictions it would be […]

It’s a commonly held myth that hardware RAID is unconditionally better than software RAID. That claim is not true in all cases and is particularly wrong at the low end. Really Cheap Hardware RAID The cheapest so-called hardware RAID uses RAID in the BIOS and relies on an OS driver for support when running in […]

Security Context is the SE Linux label for a process, file, or other resource. Each process or object that a process may access has exactly one security context. It has four main parts separated by colons: User:Role:Domain/Type:Sensitivity Label. Note that the Sensitivity Label is a compile-time option that all distributions enable nowadays. User in terms […]

This document is designed to be a cheat-sheet for MySQL. I don’t plan to cover everything, just most things that a novice MySQL DBA is likely to need often or in a hurry. Configuring mysqld If you are going to provide a database service to other machines edit /etc/mysql/my.cnf and set the bind-address parameter to […]

On my SE Linux Play Machine I have a file in the root home directory named thanks.txt_append_only_dont_edit_with_vi which users can append random comments to. It kept slowly growing from the time of Fedora Core 2 to today, here is the text. Any text within brackets is my response to a question. you can send messages […]