Archive for 'Linux' Category
Disabling the NX bit for specific apps
The NX bit is a feature of recent AMD and Intel CPUs that helps prevent the most common overflow attacks.When enabled and supported by the operating system, buffer overflow attacks are far less likely to succeed. When it was first introduced, a few applications would not run when the NX bit was present (e.g. Java [...]
Read the rest of this entry...Ubuntu remix: great on the Acer Aspire One
Just a quick note for anyone with an Acer Aspire One netbook: the latest Ubuntu Netbook Remix works great. Replacing the “Linpus Lite” Linux provided by Acer with this special edition of Ubuntu is mostly painless and everything works well.
Read the rest of this entry...RAID in Ubuntu Server updated
I’ve just updated Setting up software RAID in Ubuntu Server, one of our most popular articles. The article was originally written for Ubuntu Server 6.06 and the instructions for making failed RAID drives bootable didn’t always work in recent versions. The Ubuntu team has made many improvements to the RAID sitution in Ubuntu 8.10 (Intrepid) [...]
Read the rest of this entry...Setting up software RAID in Ubuntu Server
Updated Mar 13 2009 to reflect improvements in Ubuntu 8.04 and later. Linux has excellent software-based RAID built into the kernel. Unfortunately information on configuring and maintaining it is sparse. Back in 2003, O’Reilly published Managing RAID on Linux. That book is still mostly up-to-date, but finding clear instructions on the web for setting up [...]
Read the rest of this entry...Linux high availability clustering
One of the few remaining advantages of commercial Unix over Linux or BSD are the "enterprise" features like high availability (HA) clustering. Sun offers tools like Solaris Cluster that handle the hard parts of setting up high availability for you. In the Linux world it’s more common to see home-grown solutions like using a script [...]
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