Perché non usare l’originale?

The best part of Windows 11 is a revamped Windows Subsystem for Linux

Io sarò paranoico, ma continuo a sentire puzza di Embrace, Extend, Extinguish (Abbraccia, estendi ed estingui) .

Se la parte migliore di Win11 è il sottosistema Linux perché non usare Linux direttamente?

Oltre al fatto che l’esperienza di software libero che ottieni è monca perché la maggior parte dei programmi lato server gira male.

Perché non usare Linux direttamente?

SuperTuxKart

SuperTuxKart

SuperTuxKart is a 3D open-source arcade racer with a variety characters, tracks, and modes to play.

It’s a beautiful game, with a little glitch: to join a multiplayer you have to push the “Select” button which usually is the “Fire” or space on a keyboard. Well, on Android… where is the “Select” button?

Of course, there’s no “select”. You must use a gamepad to play SuperTuxKart multiplayer on Android.

At least until version 1.0

I’m downloading version 1.1 right now, I’ll let you know if it does change anything…

home directory – Is it okay to delete ~/.cache? – Ask Ubuntu

home directory – Is it okay to delete ~/.cache? – Ask Ubuntu

This will delete everything in your .cache that was last accessed more than a year ago

find ~/.cache/ -type f -atime +365 -delete

If you’re nervous about running it, this will show you what’s going to be deleted:

find ~/.cache/ -depth -type f -atime +365 

I’m using ‘access time’ for that, you could also try ‘creation time’ by using -ctime (although I’ve found many cache files which are years old but still accessed). Thanks to @n33rma for the edit suggestion.

Bug chasing

Some months ago I’ve set up a Debian 9 virtual machine on the VMWare server of the SME I work for. I planned to enable several services on it:

  • an IMAP server to locally store the email archive of the administration office
  • a shared calendar and address-book with the startd protocols CalDAV and CardDAV; while there are leaner server for those I chose to install Nextcloud as it would be far easier to use and integrate.

I picked Debian 9 as the operative system as it allows for a leaner and lighter installation when you start from its netinstall version. Knowing that the 40Gb I provisioned for 4 users will surely require to be expanded  sometime in the future I used Logical Volume Manager.

Everything looked fine and ran smoothly for some weeks then I started to find the machine hanged.

As I’m the only full-time employee with some proficiency in IT I am the de-facto help desk for anything “computer related”: remote banking issues, updating Java on Windows 10, maintaining installed the latest Firefox version that still support the Java Applets required by the remote banking, handling anti-viruses, non-administrative applications updates and so on. All this listing to say that I have root access on the VMWare console. I needed to reset this VM (called posta)

I had to Disable screen blanking on text console (thanks, Stack Exchange!) to catch the bug as I just can’t stare at a console for several hours hoping to catch it. So, after having removed the timeouts I left the console opened for a while.

I hadn’t to wait too long. The day after I’ve finally got a clue to follow :

Oh it looks I’ve found a bug in a kernel driver

Finally something to look for: the bug is in the kernel driver vmxnet3_rq_rx_complete. Luckily it seems a fairly common bug; excluding the bug reports from RedHat that are – rightly so! – available only to the subscribers of their services there is an interesting bug report in VMWare Knoledge Base titled «Linux VM fails with the error “kernel BUG at drivers/net/vmxnet3/vmxnet3_drv.c:1413!” (2151480)».

As the VMWare also runs the main administrative applications I think it wasn’t worth a call to the remote management so I’ve applied the workaround on posta.

As this bug showed somehow randomly I can only leave the console open and keep an eye on it.

I’ll let you know if it worked.


Ultrabook Katana

DestacadosSlimbook2Reading the pages of DUCC-IT 2017 speakers I discovered this:

Ultrabook Katana EN – SLIMBOOK Ultrabook, laptops, computers

With the notable exception of the CPU (6th generation versus 7th) it’s almost like the Dell XPS. So now I’m officially torn and I don’t know what to choose:

  • the “mainstream” company, so they will keep supporting GNU/Linux and other OS Liberi or
  • the small, European company that supports GNU/Linux as its core business?