I’ve spent over 25 years with Linux. With multiple distros and a lot of that with Gentoo and Arch. At work I specify Ubuntu or Debian, for simplicity and stability. I always used to use the minimal Ubuntu, because it was tiny with no frills. For quite a few years I managed a fleet of Gentoo systems across multiple customers - with Puppet. Those have quietly gone away. I’ve dallied with SuSE (all varieties), Mandrake, Mandriva, RedHat, Slackware, Yggdrassil and more.
Arch is surprisingly stable and being a rolling job there are no big jumps. When I replace one of our laptops, I simply clone the old one to it and crack on. I used to do the same with Gentoo - my Gentoo laptops went from an OpenRC job with dual Nokia N95 ppp connections around 2007 to through to around 2018 with systemd and decent wifi when I switched to Arch to allow the burns on my lap to heal. I still have a Gentoo VM running (amongst friends) on the esxi in my attic.
It was installed in 2006 according to some of the kernel config files. I left it for way too long and had to use git to make Portage advance forwards in time and fix around a decade of neglect. It would have been too easy to wipe and start again. It took about a fortnight to sort out. At one point I even fixed an issue following a forum post I made myself years ago.
Anyway, Arch is pretty stable.
Errm, Wireshark. Please bear with me.
Wireshark is a shining example of an open source project completely and utterly crapping on the closed source competition. As a result we all benefit. I recall spending a lot of someone else’s money on buying a sort of ruggedized laptop with two ethernet ports to do the job back in the day.
Nowdays, I can run up a tcpdump session on a firewall remotely with some carefully chosen timings and filters and download it to my PC and analyse it with Wireshark.
OK, all so convenient but is it any use?
Say you have a VoIP issue of some sort. The PCAP from tcpdump that you pass to Wireshark can analyse it to the nth degree. Wireshark knows all about SIP and RTP (and IAX) and you can even play back the voice streams or have them graphed so you can see what is wrong or whatever. That’s just VoIP, it has loads of other dissectors and decorators built in.
So what?
The UK (for example) will be dispensing with boring old, but reliable, POTS (Plain Old Telephony System) by 2025. Our entire copper telephony and things like RedCare (defunct soon) will go away.
We are swapping out circuit switching for packet switching. To be fair, a lot of the backend is already TCP/UDP/IP that is shielded away from us proles. When SoGEA (Single Order Generic Ethernet Access) really kicks in then the old school electric end to end connection will be lost in favour of packet switching, which never fails (honest guv).
If you are an IT bod of any sort, you really should be conversant with Wireshark.