In heat one: one long whistle means for the swimmers to , then the official says "take your mark". A gun, whistle, or beep may be heard as the signal for "GO".
In further heats: as the last swimmer from the heat before reaches the flags, 3 short whistles are heard to signal the next heat of swimmers that it is time for the next heat to get ready. The same commands as above then apply.
Signal handling is a programming concept that allows programs to talk to each other via 'signals'. A user can also issue signals to a program at will using the 'kill' command. For example, kill -15 <command> tells the command to terminate kill -9 <command> tells the command to terminate forcibly kill -USR1 <command> tells the command to do whatever it was programmed to do when it received the USR1 signal.
The 'kill' command is used to send a 'signal' to a process. The process is then free (for the most part) to interpret the signal as it wishes, assuming it is not a termination signal that cannot be ignored. A signal is an interrupt to the process; there are many signals that may be sent to a process or program.
by command from INTER to RCVR.
Send it the SIGQUIT signal.
you send a redstone signal to it
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Answer your spy phone when you get the signal, and report for duty in the Command Room.
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The signal for imperatives is a verb in the base form without a subject, for example "Eat your food." It is a direct command or request for someone to do something.
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Some very basic examples of DOS commands include the "cd" command, which allows a user to change to a specific directory. Another command is the "ping" command which sends an internet signal to a location.