Stdbuf

stdbuf is a command to alter the behavior of I/O filestreams for a subordinate command.

Provided by
Most (all?) Linux distributions that have this at all incorporate it from the GNU Coreutils: and use its man page

Related Commands
These all relate to running commands in an altered context.
 * chroot - Confine the program to "jail".
 * env - Change variables.
 * nice - Change priority.
 * nohup - Protect from hangups (modem) or network outages.
 * su - Change user
 * timeout - Limit the time.
 * gdb - Run under control of a debugger
 * script - Capture all program output
 * valgrind</tt> - Validate program behavior
 * strace</tt> - Create a log of system calls.