| Signal | Value | Action |
|---|---|---|
| SIGHUP | 1 | Hangup |
| SIGINT | 2 | Interrupt |
| SIGQUIT | 3 | Quit |
| SIGILL | 4 | Illegal instruction |
| SIGABRT | 6 | Abort |
| SIGFPE | 8 | Floating point exception |
| SIGKILL | 9 | Kill |
| SIGSEGV | 11 | Segmentation fault |
| SIGPIPE | 13 | Broken pipe |
| SIGALRM | 14 | Alarm clock |
| SIGTERM | 15 | Terminate (Clean attempt) |
| SIGUSR1 | 30,10,16 | User defined signal 1 |
| SIGUSR2 | 31,12,17 | User defined signal 2 |
| SIGCHLD | 20,17,18 | Child process status changed |
| SIGCONT | 19,18,25 | Continue executing, if stopped |
| SIGSTOP | 17,19,23 | Stop executing (cannot be caught or ignored) |
| SIGTSTP | 18,20,24 | Terminal stop signal |
| SIGTTIN | 21,21,26 | Background process attempting read from terminal |
| SIGTTOU | 22,22,27 | Background process attempting write to terminal |