Linux Signals

External

• https://en.wikipedia.org/wiki/Unix_signal

Internal

• Linux General Concepts

Signals

SIGHUP (1)

POSIX signal. Hangup.

Hangup is the signal that is sent to the process when the terminal closes on a foreground process.

Also see:

nohup

httpd Restart Now

SIGINT (2)

Sends the process an interrupt. Guaranteed to be present on all systems.

SIGQUIT (3)

Will trigger a Java virtual machine to generate a thread dump.

SIGKILL (9)

POSIX. Kill the process. The signal cannot be caught or ignored. Guaranteed to be present on all systems.

SIGUSR1 (10)

Also see:

httpd Graceful Restart

SIGTERM (15)

Also see:

httpd Stop Now

SIGCONT (18)

POSIX. Continue executing, if stopped.

Also see:

Suspending JVM Execution

SIGSTOP (19)

POSIX. Stop executing. The signal cannot be caught or ignored.

Also see:

Suspending JVM Execution

SIGWINCH (28)

Also see:

httpd Graceful Stop

Signals in Go

Signals in Go