psmisc 22.11-1 (i386 binary) in ubuntu natty

 This package contains miscellaneous utilities that use the proc FS:
 .
  - fuser: identifies processes that are using files or sockets.
  - killall: kills processes by name (e.g. "killall -HUP named").
  - peekfd: shows the data traveling over a file descriptor.
  - pstree: shows currently running processes as a tree.
  - prtstat: print the contents of /proc/<pid>/stat