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diff --git a/research/raspberrypi.md b/research/raspberrypi.md deleted file mode 100644 index b4acd29..0000000 --- a/research/raspberrypi.md +++ /dev/null @@ -1,161 +0,0 @@ -[[!meta title="Raspberry Pi"]] - -* [General information](https://wiki.debian.org/RaspberryPi2). - -Issues -====== - -## SSH - -SSH not working by default on newer (2017) raspbian releases. That's because it's disabled -by default. Solution is to create a file called 'ssh' in the boot partition. - -## Networking - -* You might try to make it allways up with wicd-curses. - -### Amplifier mode - -Some references on using an external soundcard as an amplifier: - -* packages: libncurses5-dev libjack-jackd2-dev jack-tools -* http://wiki.linuxaudio.org/wiki/raspberrypi -* http://www.jackaudio.org/applications/ -* http://linux-audio.4202.n7.nabble.com/Solution-for-jackd2-and-dbus-without-X-session-td35904.html -* http://comments.gmane.org/gmane.linux.audio.users/82560 -* [sound - How do I output my audio input? - Ask Ubuntu](https://askubuntu.com/questions/2719/how-do-i-output-my-audio-input) -* [Crackle-free audio on the Raspberry Pi with mpd and PulseAudio – dbader.org](https://dbader.org/blog/crackle-free-audio-on-the-raspberry-pi-with-mpd-and-pulseaudio) -* [How to play realtime insted of using arecord and aplay?](https://www.linuxquestions.org/questions/linux-newbie-8/how-to-play-realtime-insted-of-using-arecord-and-aplay-858500/) -* [Jackd Headless](https://capocasa.net/jackd-headless). - -Attempts: - - man jack_disconnect - man jack_connect - man jack_lsp - sudo jack_lsp - sudo apt-get install jack-tools - jackd - jackd --no-realtime - jackd --no-realtime -d alsa - export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket jackd --no-realtime -d alsa - DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket jackd --no-realtime -d alsa - sudo jackd --no-realtime -d alsa - DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket sudo jackd --no-realtime -d alsa - sudo apt-get install libncurses5-dev libjack-jackd2-dev -y - DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket sudo jackd --no-realtime -d alsa - DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket sudo jackd -r -d alsa -d default:CARD=USB - -### Freezing - -At the serial console: - - [123916.394903] INFO: rcu_preempt detected stalls on CPUs/tasks: - [123916.413406] 1: (1 GPs behind) idle=dcd/140000000000000/0 softirq=1003110/1003111 fqs=312910 - [123916.447541] (detected by 0, t=765007 jiffies, g=729122, c=729121, q=347657) - [123916.467769] Task dump for CPU 1: - [123916.484152] puppet R running 0 29362 1 0x00000002 - [123916.503500] rcu_preempt kthread starved for 448421 jiffies! - -References: - -* [Pi2 rcu_preempt detected stalls · Issue #1161 · raspberrypi/linux · GitHub](https://github.com/raspberrypi/linux/issues/1161). - -## Montagem automática de volume cifrado - -Assumindo: - - VOLNAME: nome do disco externo - MEDIA: nome do dispositivo mapeado (device mapper) - -No TPC: - - dd if=/dev/urandom of=pirotron bs=1024 count=4 - keyringer $PROJECT encrypt disks/$MEDIA/luks/root-berry $VOLNAME - scp $VOLNAME berry:~/ - wipe $VOLNAME - -No raspberry: - - sudo mv /home/$USER/$VOLNAME /root/ - sudo chmod 0400 /root/$VOLNAME - sudo cryptsetup luksAddKey /dev/sda1 /root/$VOLNAME - -No `/etc/crypttab`: - - $VOLNAME /dev/sda1 /root/$VOLNAME luks - -No `/etc/fstab`: - - /dev/mapper/$VOLNAME /media/$VOLNAME ext4 defaults 0 2 - -Referências: - -* https://www.howtoforge.com/automatically-unlock-luks-encrypted-drives-with-a-keyfile -* https://askubuntu.com/questions/450895/mount-luks-encrypted-hard-drive-at-boot - -## Rede - -Arquivo `/etc/network/interfaces`: - - auto lo - iface lo inet loopback - - #auto eth0 - #allow-hotplug eth0 - - #iface eth0 inet manual - #iface eth0 inet static - # address 192.168.0.100 - # netmask 255.255.255.0 - - auto wlan0 - allow-hotplug wlan0 - - iface wlan0 inet static - address 192.168.0.100 - netmask 255.255.255.0 - wpa-ssid ACCESS_POINT_NAME - wpa-psk PSK - #wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf - post-up /usr/sbin/service shorewall restart - - #iface wlan0 inet manual - # wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf - # - #iface ape inet static - # address 192.168.0.100 - # netmask 255.255.255.0 - - #iface wlan0 inet manual - #wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf - - #auto wlan1 - #allow-hotplug wlan1 - #iface wlan1 inet manual - #wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf - -Arquivo `/etc/wpa_supplicante/wpa_supplicant.conf` (por enquanto não utilizado): - - ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev - update_config=1 - - network={ - ssid="ACCESS_POINT_NAME" - psk="PSK" - } - -O esquema `wpa-roam` não funciona com interfaces `static`, então foi necessário usar [https://git.fluxo.info/?p=puppet-nodo.git;a=commit;h=d09f347afc0a99481673f227f83864d06206add6 um script]. - -Backups -------- - -Fazendo o backup do cartão microSD a partir do TPC: - - dcfldd if=/dev/sdb | bzip2 > raspberry.img.bz2 - -## References - -* http://linuxonflash.blogspot.com.br -* http://elinux.org/RPi_Serial_Connection -* https://www.raspbian.org/RaspbianMirrors |