Exit Codes returned by BASH (Bourne-Again SHell)
Exit#	Meaning
_____	________
0	Success
1	Err: General
2	Err: Misuse of Shell Built-Ins
128-2	Err: command not invokeable
128-1	Err: command not found
128-0	Err: invalid argument to "exit"
128+1	Err: fatal termination "1" (i.e. kill -1)
128+2	Err: fatal termination "2" (i.e. kill -2 = Ctrl-C)
128+n	Err: fatal termination "n" (i.e. kill -n)

NOTE:	exit codes are a one-byte unsigned value
	which overflows to wrap-around, thus:
exit -1 returns the value 255
exit -2 returns the value 254
exit -3 returns the value 253