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Simple Bluetooth Keyboard How-To

Posted 09-01-2017 at 10:37 AM by IsaacKuo
Updated 09-01-2017 at 10:42 AM by IsaacKuo
Tags bluetooth

Here's how I pair a Logitech K810 persistently, on Debian 9 Stretch (should work on most Linux distributions).

The important thing is to do the "trust" step AFTER the "connect" step. If you get the order wrong, your connection will not persist after a reboot!

I do the following as root:
Code:
bluetoothctl -a
remove 00:1F:20:91:C7:8C
scan on
pair 00:1F:20:91:C7:8C
<type passkey on bluetooth keyboard>
connect
...
Senior Member
Posted in Uncategorized
Views 764 Comments 2 IsaacKuo is offline
Old

RAMBOOT with continuous rsync synchronization

Posted 07-20-2017 at 12:55 PM by IsaacKuo

RAMBOOT is an initrd hack that loads the entire OS partition in RAM, making it run like an extremely fast SSD, at the expense of perhaps 1.5+GB of RAM.

Previously I described RAMBOOT using a compressed OS tarball. This is good for boot time, but it takes time to create a new tarball. This new How-To takes a different approach - simply copying an entire directory tree using piped tar commands (cp won't work because of the limited initrd environment). This increases boot time, but allows...
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Views 1244 Comments 6 IsaacKuo is offline
Old

NFS-RAMBOOT - How-To for Debian 9 Stretch

Posted 06-30-2017 at 06:09 PM by IsaacKuo

NFS-RAMBOOT adapts my RAMBOOT hack to NFS root (PXE or not). On boot, it extracts an OS tarball from an nfs share into local RAM (recommended 3+GB of RAM). The result is like a very fast SSD.

Why do this? Compared to RAMBOOT, loading (and saving) the OS tarball over gigabit ethernet can be faster than a local hard drive or USB drive, if the file server has an SSD or a faster hard drive (compare 3.5" drives to 2.5" laptop drives, for example). Also, having the OS tarballs...
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Posted in Uncategorized
Views 1774 Comments 3 IsaacKuo is offline
Old

tmpfs nfs swapfile - use one computer's RAM as SWAP for another computer

Posted 10-13-2016 at 11:51 AM by IsaacKuo
Updated 10-13-2016 at 03:11 PM by IsaacKuo

Previously, I described how to use one computer's RAM as an SSD (OS drive) for another computer. Here, I describe how to use one computer's RAM as SWAP for another computer. Bear in mind that even a RAM disk over gigabit ethernet isn't going to be as fast as a local SSD, but it's still faster and much more responsive than a local spinning hard drive.

This technique of using another computer's RAM as SWAP is a great way to augment RAMboot, as described here:

http://www.linuxquestions.org/questi...-jessie-37165/...
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Views 1089 Comments 0 IsaacKuo is offline
Old

Diskless PXE netboot How-To for Debian 8 Jessie

Posted 09-23-2016 at 04:15 PM by IsaacKuo
Updated 09-23-2016 at 04:53 PM by IsaacKuo

There are plenty of other diskless how-to sites out there, but I decided to post this one so it would fit in with my other similarly themed blog posts. Also, most other how-to's are a bit more complicated. This one is a simplistic setup for just one client workstation. You'd have to modify things in one way or another to handle multiple clients.

You can combine this How-To with my How-To for serving up tmpfs nfsroot on the server side. This could be useful if you want to make use...
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Views 5012 Comments 1 IsaacKuo is offline

  



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