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Linux Shell Scripting with Bash by Ken O. Burtch

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Appendix E. Signals

The following list contains the C language short form for a signal, the signal numeric value, and a short description of the purpose of the signal.

Value

C Name

Description

1

SIGHUP

Connection hang up

2

SIGINT

Interrupt

3

SIGQUIT

Quit

4

SIGILL

Illegal instruction (not reset)

5

SIGTRAP

Trace trap (not reset)

6

SIGABRT

Used by abort

7

SIGBUS

Bus error

8

SIGFPE

Floating-point exception

9

SIGKILL

Kill (cannot be caught or ignored)

10

SIGUSR1

User defined

11

SIGSEGV

Segmentation violation

12

SIGUSR2

User defined

13

SIGPIPE

Write on a pipe with no one to read it

14

SIGALRM

Alarm clock

15

SIGTERM

Terminate (kill default)

17

SIGCHLD

Child status change

18

SIGCONT

Stopped process has been continued

19

SIGSTOP

Stop (cannot be caught or ignored)

20

SIGTSTP

User stop requested from tty

21

SIGTTIN ...

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