[SlimDevices: Beta] 7 won't start on Ubuntu

[Robin Bowes]

bklaas wrote:

> If you are running as a daemon, it's a two step process from the
> command line:
> 
> ps ax | grep slimserver.pl
> 
> look at the process number of the slimserver.pl process and then kill
> it with a kill -9.

On using kill...

kill is used to send signals to a specified process or processes.

Signals have names and equivalent numbers.

You can get a list of these by using:

$ kill -l
 1) SIGHUP       2) SIGINT       3) SIGQUIT      4) SIGILL
 5) SIGTRAP      6) SIGABRT      7) SIGBUS       8) SIGFPE
 9) SIGKILL     10) SIGUSR1     11) SIGSEGV     12) SIGUSR2
13) SIGPIPE     14) SIGALRM     15) SIGTERM     16) SIGSTKFLT
17) SIGCHLD     18) SIGCONT     19) SIGSTOP     20) SIGTSTP
21) SIGTTIN     22) SIGTTOU     23) SIGURG      24) SIGXCPU
25) SIGXFSZ     26) SIGVTALRM   27) SIGPROF     28) SIGWINCH
29) SIGIO       30) SIGPWR      31) SIGSYS      34) SIGRTMIN
35) SIGRTMIN+1  36) SIGRTMIN+2  37) SIGRTMIN+3  38) SIGRTMIN+4
39) SIGRTMIN+5  40) SIGRTMIN+6  41) SIGRTMIN+7  42) SIGRTMIN+8
43) SIGRTMIN+9  44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12
47) SIGRTMIN+13 48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14
51) SIGRTMAX-13 52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10
55) SIGRTMAX-9  56) SIGRTMAX-8  57) SIGRTMAX-7  58) SIGRTMAX-6
59) SIGRTMAX-5  60) SIGRTMAX-4  61) SIGRTMAX-3  62) SIGRTMAX-2
63) SIGRTMAX-1  64) SIGRTMAX

As you can see, signal "9" is SIGKILL - this means "forcefully terminate
the running process". It does not give the program any chance to do any
internal clean-up.

Now, whilst this shouldn't cause any significant problems with
slimserver, it is generally better to use a signal that allows the
running process to run any shutdown procedures. To stop slimserver, a
SIGINT should be sufficient, i.e.:

$ kill -INT <pid>

or

$ kill -2 <pid>

R.