Polecenie kill

man kill

kill: kill [-s sygnał | -n numer-sygnału | -sygnał] pid | zadanie ... lub kill -l [sygnał]
    Send a signal to a job.
    
    Send the processes identified by PID or JOBSPEC the signal named by
    SIGSPEC or SIGNUM.  If neither SIGSPEC nor SIGNUM is present, then
    SIGTERM is assumed.
    
    Options:
      -s sig    SIG is a signal name
      -n sig    SIG is a signal number
      -l        list the signal names; if arguments follow `-l' they are
                assumed to be signal numbers for which names should be listed
      -L        synonym for -l
    
    Kill is a shell builtin for two reasons: it allows job IDs to be used
    instead of process IDs, and allows processes to be killed if the limit
    on processes that you can create is reached.
    
    Exit Status:
    Returns success unless an invalid option is given or an error occurs.

Podpowiedź

Polecam równiez od razu zerknąć do manuala polecenia trap.

Informacje dodatkowe

Listę mozliwych do wysłania sygnałów ozna uzyskac wykonując polecenie man 7 signal, poniżej wyciag tych najbardziej potrzebnych.

Pierwsze sygnały zostały opisane standardzie POSIX.1-1990.

Signal	Value	Default action	Comment
SIGHUP	1	Term	Hangup detected on controlling terminal or death of controlling process
SIGINT	2	Term	Interrupt from keyboard
SIGQUIT	3	Core	Quit from keyboard
SIGILL	4	Core	Illegal Instruction
SIGABRT	6	Core	Abort signal from abort(3)
SIGFPE	8	Core	Floating-point exception
SIGKILL	9	Term	Kill signal
SIGSEGV	11	Core	Invalid memory reference
SIGPIPE	13	Term	Broken pipe: write to pipe with no readers; see pipe(7)
SIGALRM	14	Term	Timer signal from alarm(2)
SIGTERM	15	Term	Termination signal
SIGUSR1	30,10,16	Term	User-defined signal 1
SIGUSR2	31,12,17	Term	User-defined signal 2
SIGCHLD	20,17,18	Ign	Child stopped or terminated
SIGCONT	19,18,25	Cont	Continue if stopped
SIGSTOP	17,19,23	Stop	Stop process
SIGTSTP	18,20,24	Stop	Stop typed at terminal
SIGTTIN	21,21,26	Stop	Terminal input for background process
SIGTTOU	22,22,27	Stop	Terminal output for background process

Ostrzeżenie

The signals SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.

Przykłady użycia