Backing up your MySQL databases
MYSQLDUMP is a utility for outputting database contents into text files. This is nice, but has many configuration options. One, often missed detail is the specific permissions required to accomplish...
View ArticleHow to use Bash to extract Qmail accounts for OpenSRS import
Since I happen to be going through the pain of a bulk migration from Qmail to OpenSRS, I figured I can’t be the only one. Here’s a Bash script I wrote to extract Qmail users accounts into a CSV file....
View ArticleUse BASH to extract MySQL ACL list
Need to quickly extract all the GRANT info for your database users? Here’s a one-liner: for i in $( mysql -u readuser -pReadPassword -h your.host -e "SELECT CONCAT(user,'@\'',host,'\'') AS ACL FROM...
View ArticleMy favority BASH one-liners
Let me preface this post by saying, these are hacks. Neither the best or the only ways to achieve the desired results. But hey, if they work for me, they may work for you. Enjoy! ping -i 10 4.2.2.2...
View ArticleScripting MySQL replicated slave restarts
The recent reboot requirements at Amazon AWS have brought up the topic of automated restarts of MySQL database servers. I’d like to offer a safe solution for scripting the procedure. Let’s pretend that...
View ArticleUsing screen in the Linux shell
Have you ever been remotely connected to a host using SSH and thought to yourself: “self, I wish I had more than one window…” So naturally, you opened an additional SSH session. This is fine, but then...
View ArticleGetting OpenCV setup on Fedora Linux with QT
Funny thing I’ve found about Linux distros and software applications… settings are meant to be paid attention to and tweaked. There are no common folder layouts that one should really count on. Maybe...
View ArticleBacking up with mysqldump part deux
MYSQLDUMP is a utility for outputting database contents into text files. This is nice, but has many configuration options. One, often missed detail is the specific permissions required to accomplish...
View ArticleXtraDB Cluster on CentOS 7
Setting up XtraDB Cluster (aka Galera) is straight forward…or so I was told. To do this correctly, there are some tricks. Some published. Some disparate. I’m going to save you HOURS of Googling for...
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