EXECL and FORK

• exec1.c - Parent and child.
• exec2.c - Parent and five children.
• exec3.c - Program exec3 runs program "one".
• exec4.c - Program exec4 runs the "ls" command.
• exec5.c - Program exec5 runs the "ps -lax" command.
• exec6.c - Program exec6 compiles itself, producing exec6 executable (silly).
• exec7.c - Program exec7 processes command line arguments;
• exec8.c - Program exec8 reads a command and executes it.
• exec9.c - Combine exec2 and exec8 and do (almost) anything if you provide the input;