root@mythtv:/var# du -xk / | sort -rn | head -30
2892660 /
2170528 /usr
961748  /usr/src
595372  /usr/src/linux-source-2.6.18-chw-13
527408  /usr/share
423552  /usr/lib
279088  /home
279040  /home/mythtv
265348  /home/mythtv/.mythtv
261912  /usr/src/linux-source-2.6.18-chw-13/drivers
255932  /var
252948  /home/mythtv/.mythtv/osdcache
190812  /usr/src/mythtv
163444  /var/lib
150808  /usr/bin
127628  /lib
121228  /var/lib/mysql
120700  /usr/src/mythtv/libs
117436  /lib/modules
104468  /usr/share/mythtv
100000  /var/lib/mysql/mythconverg
95924   /usr/share/doc
79484   /usr/src/linux-source-2.6.18-chw-13/arch
74928   /usr/share/webmin
74132   /usr/share/mythtv/themes
73984   /usr/src/mythplugins
61664   /var/log
59732   /lib/modules/2.6.18-chw-13.backup
59728   /lib/modules/2.6.18-chw-13.backup/2.6.18-chw-13
57728   /usr/src/linux-source-2.6.18-chw-13/fs