Interesting article on Linux permissions.
It explains how to recognise which permission system might be in use (eg SELinux, facl), the meaning and how[……]
What are the dynamic IP ranges used by AWS in Ireland for the EC2 service?
$ curl -s https://ip-ranges.amazonaws.com/ip-ranges.json | jq '.p[......]
Interesting article on the different levels and skill set of System Administrators:
If you’re working in open source, why would you use anything but Linux as your main desktop?
Sometimes disks stop responding and cause issues/slowness to the whole system, simply because the system is expecting some sort of response.
When dealing with hardware, you often see messages in the logs about disk issues or warnings.
ata9: hard resetting link
Somebody had the brilliant idea to use Unix timestamps in the Squid log.
I suppose this makes it easy to parse, not so easy to read for us humans tho[……]
You can achieve the same result with other (more powerful) tools, but I like this approach because it’s the simplest I can think of.
Let’s say you[……]
I had to make some modifications to several BIND zone files, sed proved itself invaluable once again!
All the zone files looked something like this[……]
Sometimes when creating one-liners, when the source is not “clean”, you may end up with non-ascii characters which make the parsing harder.