Convert astdb to sqlite 3
Up until version version 11, Asterisk used an old version of the Berkeley DB 1.86 (bdb) to store its internal persistent database. In version 11 it switched to using a SQLite 3 database. This program is used to convert an existing bdb astdb file to astdb.sqlite3.
Normally the conversion is done by Asterisk itself which will run this program. But you may need to run it on your own.
There is a single (and required) parameter: the path the the bdb file. The output file name will be the same as the input, with .sqlite3 appended.
Asterisk will typically run the following to upgrade the database:
which will create /var/lib/asterisk/astdb.sqlite3.