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Signals, job control and pipes

Job control signals

The following signals manage Job Control (see also signal(5)):


SIGCONT
Sent to a stopped process to continue it.

SIGSTOP
Sent to a process to stop it. This signal cannot be caught or ignored.

SIGTSTP
Sent to a process to stop it. It is typically used when a user requests to stop the foreground process.

SIGTTIN
Sent to a background process to stop it when it attempts to read from the controlling terminal.

SIGTTOU
Sent to a background process to stop it when one attempts to write to or modify the controlling terminal.

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