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--- raspberry-pi:raspbian [2015/08/02 18:51]
josep created
+++ raspberry-pi:raspbian [2019/01/14 21:18] (current)
josep
@@ Line 1: / Line 1: @@
 ====== Raspbian ======
+===== Apt sources =====
+==== Wheezy ====
+**/etc/apt/sources.list**
+<code>
+deb http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi
+</code>
+**/etc/apt/sources.list.d/raspi.list **
+<code>
+deb http://archive.raspberrypi.org/debian/ wheezy main
+</code>
+==== Jessie ====
+**/etc/apt/sources.list**
+<code>
+deb http://mirrordirector.raspbian.org/raspbian/ jessie main contrib non-free rpi
+</code>
+**/etc/apt/sources.list.d/raspi.list **
+<code>
+deb http://archive.raspberrypi.org/debian/ jessie main
+</code>
+===== Hardware random number generator =====
+Install the package **rng-tools** and add to **/etc/modules**:
+<code>
+bcm2708-rng
+</code>
 ===== Increase USB power =====
@@ Line 6: / Line 39: @@
 max_usb_current=1
 </code>
+===== Force always HDMI output =====
+Add this to **/boot/config.txt**
+<code>
+hdmi_force_hotplug=1
+hdmi_drive=2
+</code>
+https://raspberrypi.stackexchange.com/questions/2169/how-do-i-force-the-raspberry-pi-to-turn-on-hdmi
+===== Force specific HDMI resolution =====
+Add this to **/boot/config.txt**
+<code>
+hdmi_group=1
+hdmi_mode=16
+</code>
+Tip: you can check the current state with **tvservice -s**
+List of resolutions: https://www.raspberrypi.org/documentation/configuration/config-txt/video.md
+===== Missing man pages =====
+  * https://unix.stackexchange.com/questions/79028/debian-install-missing-man-pages
+  * https://raspberrypi.stackexchange.com/questions/7918/raspbmc-install-missing-man-pages
+===== Kernel =====
+There are 2 kernels available, one distributed by the Raspberry Foundation (package **raspberrypi-bootloader**) and another by Debian/Raspbian (packages **raspberrypi-bootloader-nokernel** and **linux-image-rpi2-rpfv**). If the last packages don't appear, add **firmware** as a component of the raspbian repository.
+https://www.raspberrypi.org/forums/viewtopic.php?t=50310&f=66
+===== Partitions =====
+The **PARTUUID** identifier is autogenerated from the MBR's partition table identifier, it can be shown with:
+<code>
+$ sudo fdisk /dev/sdb
+Welcome to fdisk (util-linux 2.29.2).
+Changes will remain in memory only, until you decide to write them.
+Be careful before using the write command.
+Command (m for help): p
+Disk /dev/sdb: 7.4 GiB, 7948206080 bytes, 15523840 sectors
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 512 bytes
+I/O size (minimum/optimal): 512 bytes / 512 bytes
+Disklabel type: dos
+Disk identifier: 0x7ee80803
+</code>
+This matches the identifier of the partitions:
+<code>
+$ sudo blkid
+/dev/sdb1: LABEL="boot" UUID="9304-D9FD" TYPE="vfat" PARTUUID="7ee80803-01"
+/dev/sdb2: LABEL="rootfs" UUID="29075e46-f0d4-44e2-a9e7-55ac02d6e6cc" TYPE="ext4" PARTUUID="7ee80803-02"
+</code>
+<code>
+sudo lsblk -o name,mountpoint,label,size,uuid
+sudo blkid
+</code>
+It can be changed using fdisk:
+<code>
+fdisk /dev/sdb
+p
+x
+i
+x${PTUUID}
+r
+p
+w
+</code>
+Also, the **UUID** of the partition (different from the previous one) can be modified with:
+<code>
+sudo tune2fs /dev/sde5 -U <UUID>
+</code>
+===== Automount USB drived =====
+<code>
+sudo aptitude install usbmount
+</code>
+Create an override for **systemd-udevd**:
+<code>
+sudo systemctl edit systemd-udevd
+</code>
+And add the following in the editor that opens:
+<code>
+[Service]
+MountFlags=shared
+</code>
+===== Increase systemd service timeout =====
+Set this in the file **/etc/systemd/system.conf**:
+<code>
+DefaultTimeoutStartSec=infinity
+</code>
+This will avoid timing out the fsck filesystem check on boot.
+  * https://serverfault.com/questions/927982/fsck-on-boot-leads-to-systemd-dependency-failure-and-subsequent-boot-failure
+  * https://raspberrypi.stackexchange.com/questions/88721/how-to-avoid-fsck-at-boot-timing-out
+===== References =====
+  * https://jmeosbn.github.io/blog/minimal-raspbian-pi/
+  * http://angryelectron.com/udisks-glue-initscript/
+  * https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=44177
+  * https://elinux.org/RPi_Resize_Flash_Partitions

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