I'm not able to install PMOS

[gonchez]

Hi, sorry for disturbing here for this, but I'm a symple linux user and I'm not able to install Postmarket OS on my Asus tablet. When I connect the tablet with my pc on fastboot mode it doesn't show "fastboot devices" on it.

I would be very grateful if you could bring me some simple instructions installing it.

thanks so much in advance

[gonchez]

Well, I've done some advances,... first of all, after installing adb and fastboot, enable USB debugging on tablet, like it explain really good here:
https://itsfoss.com/install-adb-fastboot-linux/
Then, it didn't recognize tablet when I plugged on PC, so I found this:
https://developer.android.com/studio/run/device
Later I was able to flash the New EFI System Partition, but when I get into recovery mode, it displays an error.
I keep on doing.

[stephan-gh]

If the display shows an error when entering recovery mode you likely need to install TWRP first: https://forum.xda-developers.com/memo-pad-7/orig-development/recovery-unofficial-twrp-3-2-1-asus-t3745190