snap + firefox made me angry
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How to disable snap and reinstall mozilla firefox non-snap packages on Ubuntu Linux 22.04 and later Continue reading
Category Archives: Linux
less Tips and Tricks
The less tool can open multiple files in order, I find this useful when comparing sets of logs. For instance Which will open the first file it finds and hold the rest in reserve, switching forward and backwards through this … Continue reading
Imagemagick
Imagemagick can calculate the best resolution and quality for JPEG type files with the -define jpeg:extent=SIZE optional argument. An example of this would be to reduce the size of a multi-megapixel image by half and targeting a desired maximum file … Continue reading
XPS 13 and M3800
So very recently my beloved 2013 era XPS 13 developer edition finally failed. The HID controller failed and that’s pretty much it for these things. As a result of this I ended up switching back to my spare laptop (well … Continue reading
Decoding lustre /tmp/lustre-log.XXXX dumps
Simple tip, to decode thread stack dumps from Lustre file system, which typically get dumped into /tmp, run: lctl df <input file> <output file> This will leave you with an ascii formatted, human readable stack trace which can be used … Continue reading
Infiniband Tips and Tricks
Below are some commands I’ve found useful when dealing with infiniband and related issues. Determine port state on all ports available within the fabric The command ibnetdiscover command will show you the state of each port in the the fabric. … Continue reading
New Perl module: Filesys::Virtual::Chroot
I’ve been trying hard lately to take useful code I’ve written over the years for different projects (such as my predictive anti-spam system Ruckus scanmail) and rep.ublish the libraries with more generic names under CPAN Filesys::Virtual::Chroot provides advisory functions for … Continue reading
DVD ripping in Linux
So there are multiple methods to pull this off, however after doing it by hand, using DVD::rip, using Handbrake, etc. I finally settled on VLC. Yes, good old VLC has DVD ripping support. http://www.instructables.com/id/How-to-rip-DVDs-for-free-with-VLC outlines how this is done, and … Continue reading
Another year, another LUG.
Well it’s been another year, and another Lustre User Group meeting. There were many interesting discussions which took place. Though in general I found the most useful session to be after the LUG was completed. The developer meeting, for me … Continue reading
Multiple claimed blocks errors
So your file system has crashed… Upon running e2fsck against it you’re now seeing error such as: Pass 1B: Rescanning for multiply-claimed blocks Multiply-claimed block(s) in inode 4195619: 167904376 167904377 167904378 167904379 167904380 167904381 167904382 167904383 167904384 167904385 167904386 167949296 … Continue reading