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.