Portslave is a project that was started in the 90′s to listen to a serial port and launch a PPP or SLIP session after a user has been authenticated, I describe it as a “project” not a “program” because a large part of it’s operation is via a shared object that hooks into pppd, so [...]
Hetzner is offering new servers with SSD, good news for people who want to run ZFS (for ZIL and/or L2ARC). See the EX server configuration list for more information . Unfortunately they don’t specify what brand of SSD, this is a concern for me as some of the reports about SSD haven’t been that positive, [...]
As storage capacities increase the probability of data corruption increases as does the amount of time required for a fsck on a traditional filesystem. Also the capacity of disks is increasing a lot faster than the contiguous IO speed which means that the RAID rebuild time is increasing, for example my first hard disk was [...]
I’ve just released a new version of Memlockd, a daemon to lock essential files in RAM to increase the probability of recovering a system that is paging excessively .
The new features are: Using Debian/Wheezy paths for shared objects on i386 and amd64.
Added a new config file option to not log file not found [...]
I previously wrote about a failure of a USB flash device in my Internet gateway . I have since had another failure in the same system, so both the original 4G devices are now dead. That’s two dead devices in 10 weeks. It could be that the USB devices that I got for free at [...]
Last month I wrote about using USB flash storage devices for my firewall and Squid proxy . 4 days ago it failed, the USB device used for the root filesystem stopped accepting write requests. The USB device which is used for /var/spool/squid is still going well after almost 5 months of intensive use while the [...]
For some years I have had my Internet gateway/firewall system in a cupboard in my bedroom. While I don’t mind some computer noise (I’ve slept near a server for most of the last 22 years) it’s good to have it as quiet as possible so getting rid of the hard drive is desirable.
I considered [...]
Late last year I wrote about the way that modern laptops suck . One of the problems that inspired that post was the excessive heat generated by my Thinkpad T61.
There is a partial solution to this, Fool Control explains how the kernel option pcie_aspm=force can be used on kernels from 2.6.38 onwards to solve [...]
I’ve just discovered that the magic database for the file(1) command in Debian/Unstable has no support for Linux Software RAID and that it’s support for BTRFS is lacking (no reporting of space used, number of devices, or the UUID). Below is my first draft of a change to fix these problems. I would appreciate it [...]
I was asked for advice on how to start learning Linux. Rather than replying via email I’m writing a blog post for future people who ask such questions and also to get comments from other people which may provide information I missed.
Join a LUG
The best thing to do is to start by joining [...]