/usr/share/doc/radare2/rgraph is in radare2 0.9.6-3.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | Not-much-updated graph of relationships between the libr APIs
=============================================================
+--------+
.-| config |
/ +--------+
+------+ +------+ +------+ +------+
| core |--| cons | | asm | | diff |
+------+ | line | | bin | | sign |
| \ +------+ | anal | | hash | ,_____.
+----+ \ +---.--+ +--.---+ +._____.+
| io | +-------------'------/ | |
+----+ | cmd, search, print |<------>| flags |
| +------.-------------\ | meta |
[ lib ] +----'----------+ +-`-----+ +._____.+
| .----| debug, bp, vm | | lang |
| | | reg, syscall | | macro |
+------'--+ | var, trace | +-------+
| plugins | +---------------+ |
+-----.---+ |
`---------------------------'
|