special files and paths

/data/local/userinit.sh # init script
/etc/security/cacerts # root certificates

BL  = BootLoader
AP  = PDA (Firmware)
CP  = Phone
CSC = CSC

List encrypted volumes #

mount | grep dm-

Package Manager #

pm help
pm list packages
pm list features
pm list path <PACKAGE> (returns the path to the apk)
pm install <APK-FILE>
pm list users
pm create-user

# list all apks...
for i in $(pm list packages) ; do  q=$(pm path ${i#package:}) ; echo ${q#package:}   ; done

To make an installed package available for another user, look up $UID with pm list users and $APPID with pm list packages, then run:

pm install-existing --user $UID $APPID

To share data between different accounts use the /sdcard/obb folder.