4.1.5.3. Signals
Processes end because they receive a signal. There are multiple
signals that you can send to a process. Use the kill command to send a signal to a process. The
command kill -l
shows a list of signals. Most signals are for internal use by the
system, or for programmers when they write code. As a user, you
will need the following signals:
Table 4-2. Common signals
| Signal name |
Signal number |
Meaning |
| SIGTERM |
15 |
Terminate the process in an
orderly way. |
| SIGINT |
2 |
Interrupt the process. A process
can ignore this signal. |
| SIGKILL |
9 |
Interrupt the process. A process
can not ignore this signal. |
| SIGHUP |
1 |
For daemons: reread the
configuration file. |
You can read more about default actions that are taken when
sending a signal to a process in man 7 signal.
