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My New Toy: The Raspberry Pi 3 Model B

Submitted by donmc on Tue, 01/31/2017 - 23:01

The Raspberry Pi 3 Model B is the third generation Raspberry Pi with a 64-bit 1.2GHz quad-core processor, 1GB of RAM, WiFi (b/g/n), and Bluetooth 4.1!

The latest Raspberry Pi retains the same overall form factor as previous models ensuring compatibility with existing add-on boards (HATs) however some minor changes to the layout and more powerful processor mean we've redesigned our Pibow case.

Another toy - testing NGINX as a web server

Submitted by donmc on Sat, 11/19/2016 - 20:28
root@pve:/var/lib/vz/dump# pct restore -storage local-lvm --rootfs 4 300 vzdump-lxc-200-2016_11_19-12_23_24.tar.gz
  Logical volume "vm-300-disk-1" created.
mke2fs 1.42.12 (29-Aug-2014)
Discarding device blocks: done                            
Creating filesystem with 1048576 4k blocks and 262144 inodes
Filesystem UUID: 602ba375-c829-40d2-a1bb-8275d5ce9407
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736

Allocating group tables: done                            
Writing inode tables: done                            

Removing dead tracks from itunes

Submitted by donmc on Sat, 06/18/2016 - 13:35

This was very useful for a corrupted song db in itunes:

You can use a playlist to collect dead tracks.
Create new regular playlist – Playlist1
Select whole library and drag to Playlist1
Create new Smart Playlist with the rule: Playlist is not Playlist1
Live updating checked – after you run it, uncheck live updating or you may not be able to delete tracks.
This playlist should contain all the dead tracks
Use shift-del to remove from library

Proxmox convert from OpenVZ to LXC

Submitted by donmc on Sun, 06/12/2016 - 16:45

This is a bit exciting for me - less so for anyone else I guess :(
But it has taken me a while to get to this point.

Took a snapshot backup from the office proxmox V3.x server, and brought it home t o convert to LXC (Linux Container) format on a proxmox 4.2 server (apparently LXC is the go nowadays - who knew?)

Here's the magic bit:

Saved: Proxmox Linux Header updates caused boot failures

Submitted by donmc on Tue, 05/03/2016 - 08:29

I have been grappling with this for a while - turns out it was something very simple:

grub-mkdevicemap -n

root@pve:~# grub-mkdevicemap -n
root@pve:~# update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-2.6.32-39-pve
Found initrd image: /boot/initrd.img-2.6.32-39-pve
Found memtest86+ image: /boot/memtest86+.bin
Found memtest86+ multiboot image: /boot/memtest86+_multiboot.bin

Notes from boot-repair utility

Submitted by donmc on Tue, 06/02/2015 - 16:24

I have always found the boot area a difficult one to understand.
Take this link as an example:

And AFTER the repair:
http://paste.ubuntu.com/11527984/ <-- This one Failed...

Another try - it inlcuded a re-install of Grub
Please write on a paper the following URL:

That's the out put from my laptop after I munged the disk arrangement adding a larger drive.

install Boot-Repair in Ubuntu

disable password authentication for sshd

Submitted by donmc on Sat, 01/03/2015 - 10:25
This is considered good practice for any linux platform that has publicly addressable interfaces... Of course you will need to setup PKI public/private keys for any secure login. I am not suggesting that you turn off authentication entirely !
I had a VPS linux host out there untended for a while, and the hackers find it irresistible - there were 11,000+ authentication failures in the logs.

To stop password authentication by sshd, just add these entries to your /etc/sh/sshd_config file:

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