Many places have password policies. And they often prescribe that your password MUST include things like:
The problem is: That advice is wrong.
Or at least: the advice guides people towards difficult-to-remember passwords and it does not increase security.
The single …
read moreA post about some maths homework caused some consternation and confusion on one of my local facebook groups:
Lots of people seemed to think this was far too advanced for a 9-year-old, or that solving such puzzles would have no applications in real life.
I beg to disagree.
Yes, I …
read moreThe spammers who try to flood my inbox must be getting desperate - they're offering to stop if I pay them!
From: "Admin" <admin@secureserver.eu>
Subject: I will stop spaming you
I'm sick of sending spam...
If you send me $10 USD worth of XMR / Monero I will remove …A Californian woman is allegedly suing her own parents because she is ugly!
At least that is what the article claims... It is hilarious and plays into our biases about people from the USA to be litigious and generally a bit weird.
Alas, it is fake news. Or to be …
read moreThe scenario: Your server is not working right: You cannot start new processes! Simple commands like "ls" fail:
yourname@yourserver:~$ ls
-bash: fork: retry: Resource temporarily unavailable
This is a symptom of the kernel reaching the maximum number of processes. On most systems, this is 32768 processes, and on 64-bit …
read moreThe wolderful flexibility of being able to mount file systems at any point in the file system comes at a small cost: You can end up hiding files - usually by mistake.
For example, imaging having the following file systems:
The situation: df (which shows disk usage) disagrees with du (which shows disk space taken up by files). So you have disk space which is "used", but it is not taken up by any files!? What gives!?
For example:
root@xps:~# df -h /tmp
Filesystem Size Used Avail Use% Mounted …When investigating disk usage issues on a very full disk, the investigation may actually be hampered by the lack of disk space. For example:
du -x -m / | sort -nr | head -25
can fail if you have a lot of directories and your disk is completely full: sort will only process …
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