EXIT       0          execute on exiting shell
HUP	1	 hangup 
INT	2	 interrupt (rubout) 
QUIT	3	 quit (ASCII FS) 
ILL	4	 illegal instruction (not reset when caught) 
TRAP	5	 trace trap (not reset when caught) 
IOT	6	 IOT instruction 
ABRT	6	 used by abort, replace SIGIOT in the future 
EMT	7	 EMT instruction 
FPE	8	 floating point exception 
KILL	9	 kill (cannot be caught or ignored) 
BUS	10	 bus error 
SEGV	11	 segmentation violation 
SYS	12	 bad argument to system call 
PIPE	13	 write on a pipe with no one to read it 
ALRM	14	 alarm clock 
TERM	15	 software termination signal from kill 
USR1	16	 user defined signal 1 
USR2	17	 user defined signal 2 
CLD	18	 child status change 
CHLD	18	 child status change alias (POSIX) 
PWR	19	 power-fail restart 
WINCH	20	 window size change 
URG	21	 urgent socket condition 
POLL	22	 pollable event occured 
IO	SIGPOLL	 socket I/O possible (SIGPOLL alias) 
STOP	23	 stop (cannot be caught or ignored) 
TSTP	24	 user stop requested from tty 
CONT	25	 stopped process has been continued 
TTIN	26	 background tty read attempted 
TTOU	27	 background tty write attempted 
VTALRM	28	 virtual timer expired 
PROF	29	 profiling timer expired 
XCPU	30	 exceeded cpu limit 
XFSZ	31	 exceeded file size limit 
WAITING  32	 process's lwps are blocked 
LWP	33	 special signal used by thread library 
FREEZE	34	 special signal used by CPR 
THAW	35	 special signal used by CPR 

BDV-SKILLS-UK