Linux

Signal	Value	Default Action	Meaning (Reason for Signal)
SIGHUP	1	Term	Hangup of terminal or process death
SIGINT	2	Term	Interrupt signal from keyboard
SIGQUIT	3	Core	Quit signal from keyboard
SIGILL	4	Core	Illegal instruction
SIGABRT	6	Core	Abort exception signal
SIGFPE	8	Core	Floating-point exception
SIGKILL	9	Term	Kill
SIGSEGV	11	Core	Invalid memory reference (segmentation fault)
SIGPIPE	13	Term	Broken pipe: write to pipe with no readers
SIGALRM	14	Term	Timer signal from alarm
SIGTERM	15	Term	Termination
SIGUSR1	30,10,16	Term	User-defined signal 1
SIGUSR2	31,12,17	Term	User-defined signal 2
SIGCHLD	20,17,18	Ign	Child process stopped or terminated
SIGCONT	19,18,25	Cont	Continue if stopped
SIGSTOP	17,19,23	Stop	Stop signal not from terminal
SIGTSTP	18,20,24	Stop	Stop signal from terminal
SIGTTIN	21,21,26	Stop	Background process attempting read
SIGTTOU	22,22,27	Stop	Background process attempting write
SIGBUS	10,7,10	Core	Bus error (memory access error)
SIGPOLL		Term	Pollable event (Sys V), synonym for SIGIO
SIGPROF	27,27,29	Term	Profiling timer expired
SIGSYS	12,-,12	Core	Bad system call (SVr4)
SIGTRAP	5	Core	Trace/breakpoint trap
SIGURG	16,23,21	Ign	Urgent condition on socket (4.2BSD)
SIGVTALRM	26,26,28	Term	Virtual timer expired (4.2BSD)
SIGXCPU	24,24,30	Core	CPU time limit exceeded (4.2BSD)
SIGXFSZ	25,25,31	Core	File size limit exceeded (4.2BSD)
SIGIOT	6	Core	IOT trap, synonym for SIGABRT
SIGEMT	7,-,7		Term
SIGSTKFLT	-,16,-	Term	Coprocessor stack fault (unused)
SIGIO	23,29,22	Term	I/O possible on descriptor
SIGCLD	-,-,18	Ign	Synonym for SIGCHLD
SIGPWR	29,30,19	Term	Power failure/restart (System V)
SIGINFO	29,-,-		Synonym for SIGPWR
SIGLOST	-,-,-	Term	File lock lost
SIGWINCH	28,28,20	Ign	Window size change (4.3BSD, Sun)
SIGUNUSED	-,31,-	Term	Unused signal (will be SIGSYS)

Windows

Signal	Description
SIGABRT	Abnormal termination
SIGFPE	Arithmetic error
SIGILL	Illegal instruction
SIGINT	Ctrl+C signal
SIGSEGV	Illegal storage access
SIGTERM	Termination request