Unix in a Nutshell, 4th Edition

Running a Program

advance	Continue the program up to the given location.
attach	Attach to a process or file outside of GDB.
continue	Continue the program being debugged.
detach	Detach a previously attached process or file.
finish	Execute until selected stack frame returns.
handle	Specify how to handle a signal.
interrupt	Interrupt the execution of the debugged program.
jump	Continue program being debugged at specified line or address.
kill	Kill the program being debugged.
next	Execute the program’s next statement.
nexti	Execute the program’s next instruction.
run	Start the debugged program.
signal	Continue the program, giving it a specified signal.
start	Run the debugged program until the beginning of the main procedure. Useful for C++ where constructors run before main().
step	Step the program until it reaches a different source line. Descends into called functions.
stepi	Step exactly one instruction.
thread	Switch between threads.
thread apply	Apply a command to a list of threads.
thread apply all	Apply a command to all threads.
tty	Set the terminal for future runs of the debuggee.
unset environment	Remove a variable from the debuggee’s environment.
until	Execute until the program reaches a source line greater than the current one.