The jls utility lists all active jails. Each jail is represented by one row which contains the following columns: jail identifier (JID), IPV4 address, hostname, and path. This utility lists jails started with both sysjail(1) and jail(1).
FILES
Database file is a btree at /var/db/sysjal.db.
EXIT STATUS
The jls utility returns 0 on success or 1 on failure. Failure may leave a corrupt jail database.