Author Archives: pingd

MyISAM Repair all MySQL Databases & Tables

So you’ve probably not made the switch to InnoDB or XtraDB yet, shame on you! But tonight your server crashed, ran out of disk space or otherwise corrupted all of your active tables across various databases. Ouch! How are we … Continue reading

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Reset Supermicro IPMI Password From Windows

I recently had an issue where we lost the password for IPMI to a brand new Supermicro server. The server was running Windows 2008 STD. Not wanting to mess around rebooting the box to a livecd I had to find … Continue reading

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suPHP on CentOS 6 from Source Code

So you’ve decided that you must run php as suPHP on your CentOS 6 based LAMP stack. This is a great idea for security on a multi-site or multi-user environment. Of course management panels like cPanel make running suPHP very … Continue reading

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AWK to win friends and influence women

AWK is a powerful tool, a language really, that every administrator needs to know. I recommend everyone read about awk and learn how to use it. It can really make your day when you need to do something, quick and … Continue reading

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CRON ERROR: failed to open PAM security session: Protocol not supported

Got an interesting report of an error on one of our servers. I was told crons for a user account on our server weren’t running. I tailed the cron log (/var/log/cron) and came to find these errors:

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ZFS on Linux RC10 released!

The ZFS on linux team has released a new version of SPL and ZFS with multiple benefits to users. The new version is 0.6.0-rc10 and our guide found here is being updated now: Installing ZFS RAID-Z on CentOS 6.2 with … Continue reading

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Pick random line from text file with bash and shuf.

So lets say you have a text file called list.txt with entries like: What if you wanted to pick a random entry? The easiest solution is to use the ‘shuf’ tool, which is standard on CentOS as part of coreutils. … Continue reading

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New ZFS on Linux release (RC9).

We have one of the most comprehensive guides on the internet for ZFS. Please check the updated guide for assistance with installing ZFS on Linux, specifically CentOS 6.2 here: Installing ZFS RAID-Z on CentOS 6.2 with SSD Caching

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No module named cElementTree yum update error

Found yum broken on a legacy CentOS 5.x server while installing updates. The error was: root # yum update There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: … Continue reading

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Installing ZFS RAID-Z on CentOS 6.6 (Final) with SSD caching.

Updated February 22nd, 2015 I recently had a project that required data storage with deduplication, data integrity assurance, and hardware fault tolerance. Instead of going with a traditional hardware RAID solution I opted to test out ZFS. My configuration utilized … Continue reading

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