Suggested by Sebastian Stark.
There's an interactive mode which allows to quickly launch many queries
on the same database using different modes and different output files.
+
+The following example creates a database containing the disk usage patterns
+of the /var directory:
+
+ $ adu -C -d /root/adu-var -b /var
+
+Here's a simple query that uses the newly created database to print the
+user-summary:
+
+ $ adu -S -d /root/adu-var
+
+ User summary
+ root 0 605 12K 267m
+ mysql 103 8 144 81m
+ postgres 113 19 506 31m
+ man 6 37 87 2m
+ syslog 101 1 54 1m
+ ntp 107 4 23 253k
+ gdm 112 3 20 184k
+ postfix 106 1 14 56k
+ statd 105 4 7 16k
+ sgeadmin 111 4 4 12k
+ daemon 1 3 4 12k
+ www-data 33 3 3 8k
+ news 9 2 2 8k
+ fetchmail 110 1 1 4k
+ libuuid 116 1 1 4k
+ localadmin 1000 1 1 1k
+ dhcp 100 1 1 992b
+ klog 102 2 2 105b
+ avahi 114 2 2 105b
+ messagebus 108 1 1 80b
+ polkituser 117 1 1 40b