This post appeared originally in our sysadvent series and has been moved here following the discontinuation of the sysadvent microsite
Ever wanted to record a log of an interactive console session? Easy, just use
the script utility. It’s probably already present on your system, no
installation required.
To start recording, run script --timing=script.tim script.log. This spawns a
new shell, recording stops when you exit from it.
To replay the log, run scriptreplay script.tim script.log. It is also
possible to speed up or slow down the playback speed. For example, in order to
play back the recording at half of the original speed, use scriptreplay
script.tim script.log 0.5. Ctrl+S pauses the playback, Ctrl+Q resumes.
The nice thing about script is that it records everything that happens on the
console, it’s not just a simple log of invoked commands. If you open a text
editor like vi in the recorded session, you’ll be able to see exactly how and
where you navigate the cursor, exactly how and when text was changed -
including any typos that were later corrected, and so on.
For the full documentation, check out the manual pages script(1) and scriptreplay(1).
Putting Varnish CDN in front of a serverless container with OpenTofu
Serverless containers are a great way to run a small site: you push an image, you get an HTTPS URL, and you don’t pay for resources when nobody is accessing your application. What you don’t get is caching close to the client, or protection from the cold-start penalty every time a visitor arrives after the serverless container has spun down.
That is exactly what a CDN is for and an excellent choice for this is Varnish CDN which lets you ... [continue reading]