== Linux filesystem on SD card ==

[[http://forum.powerampapp.com/index.php?/topic/4365-support-for-ext4-formatted-external-sd-cards/|Support for ext4 formatted external sd cards]] describes writing an init.d script that:

{{{#!highlight sh numbers=off
mount -o rw,UID=1000 -t ext4 /dev/block/mmcblk1p1 /storage/extSdCard
}}}

== Android device encryption tips ==

[[http://forum.xda-developers.com/showthread.php?t=2484380|[Q] mount cryptfs? - xda-developers]]

In recovery, unlock an encrypted partition with:

{{{#!highlight sh numbers=off
setprop ro.crypto.state encrypted
vdc cryptfs checkpw 'your passphrase here'
mount -o rw /dev/block/dm-0 /data
}}}

Make sure to unmount /data.

Logs are in /dev/log/system and/ or (in a second shell) /dev/log/main.

== External links ==

 * [[https://stumbles.id.au/configuring-android-k-9-mail-from-the-command-line.html|Configuring Android K-9 Mail from the command line]]