Sighup Hung (hangup)
SIGINT interrupted when the user presses the ^C key or ^break key from the keyboard
Sigquit exits, when the user presses the QUIT key from the keyboard
Sigill Illegal Instruction
Sigtrap Tracking Trap (trace trap), starting process, tracking code execution
Sigiot IoT directive
SIGEMT EMT directive
SIGFPE floating-point operation overflow
SIGKILL kills, terminates the process
Ten Sigbus Bus Error
One SIGSEGV paragraph violation (segmentation violation), the process attempts to access a location other than its virtual address space
Sigsys parameter Error in system call, such as system call number illegal
Sigpipe writes data to a non-read pipeline
SIGALRM Alarm Clock. Send this signal when a process wants to receive a signal after a certain time
Sigterm software termination (software termination)
SIGUSR1 user-defined signal 1
SIGUSR2 user-defined signal 2
SIGCLD a child process dies
SIGPWR Power failure
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