Archive for March 17th, 2015
Things to remember during Raspberry Pi setups…
You can do some of this through
- Comment out all the NOOBS auto-configuration entires at the bottom
The highest mutually compatible setting for the U2711 monitor was 1920×1080@60Hz, which turned out to be CEA Mode 16 and was automagically selected as the monitor’s “native” mode. Disabling overscan lets the X session use the entire monitor screen, rather than being confined within the (huge) black overscan borders.
That requires a power off-on cycle to take effect. Shut down properly with
sudo shutdown -H now or just
To set the default size of the
lxterminal window so that it’s big enough to be useful, edit the
Exec entry (down near the bottom) in
/usr/share/raspi-ui-overrides/applications/lxterminal.desktop to read:
The Droid font family seems more readable than the default selection.
Create a user for yourself, just so SSH will eventually work the way it does for all the other boxes. The group list comes from the default
sudo adduser ed sudo usermod -a -G pi,adm,dialout,cdrom,sudo,audio,video,plugdev,games,users,netdev,input,spi,gpio ed
Regrettably, the default pi user has the same numeric ID as the one I use on all the other boxes, which leads to problems with file sharing permissions. I may need to swap numeric IDs to make this work out correctly.
To set a static IP, edit
#iface eth0 inet dhcp <-- comment this out to stop DHCP auto eth0 iface eth0 inet static address 192.168.1.9 <-- obviously, pick your own gateway 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255
Change the hostname in
Set up SSH for public-key access on an unusual port by editing
- Port 12345 <— choose your own
- PermitRootLogin no
- PasswordAuthentication no
~/.ssh directory and put your own public key in it, which you can do from the remote system:
scp ~/.ssh/id_rsa.pub octopi-1:.ssh/authorized_keys # a dummy line to reveal underscores in the previous line
~/.ssh/config on the remote box to include the Pi and specify the unusual port:
Host octopi-1 thisone thatone anotherone ForwardX11 yes Port 12345 <--- pick your own User ed
ssh-agent -t 4h helps relieve the tedium of typing your passphrase all the time. Then
sudo service ssh restart on the pi will require you to use your key passphrase; it’s a Good Idea to remain signed in through Port 22 with the original authorization while you fiddle with this stuff, then sign out when it all works.
Update with the usual routine:
sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade <-- for system-level update sudo apt-get clean <-- flushes /var/cache/apt/archives to save space