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Old 04-09-2005, 06:09 AM   #1
Registered: Jul 2004
Distribution: Slackware, Suse
Posts: 46

Rep: Reputation: 15
Starting a program from a shell script

Hey guys,

I have been trying to write a shell script which is able to run a little programm.

ping -c 2
if [$? !=0] ; then
wol --host= 90:50:A1:EF0:53
echo "Starting up Host"
Thats what I got so far. What I want to do is that the script pings one of my computers in my network.
Whenever it fails I want the script to start the program "wol" which starts up the remote computer by the wake on lan function.

I am a noob in shell programming so it is a minor error most probably. I guess the line

wol --host= 90:50:A1:EF0:53

has to be different. It is the whole command which has to be executed.


Old 04-09-2005, 09:06 AM   #2
Registered: Mar 2003
Location: Scotland
Distribution: Slackware, RedHat, Debian
Posts: 12,047

Rep: Reputation: 65
Are you getting an error when you try to run the script? Perhaps you could tell us what it is.
Old 04-17-2005, 01:16 AM   #3
Registered: Jul 2004
Location: Rio de Janeiro - Brazil
Distribution: Conectiva 10 - Conectiva 8 - Slackware 9 - starting with LFS
Posts: 519

Rep: Reputation: 34
Hi Suinatsa,
Looking your script, I guess it is logically correct. However, you must get a syntax error in the line:
if [$? !=0]
The character "[" is a symbolic link to /usr/bin/test. If you read "man test", you'll see:
1 - when using the alternative "[" "]" you have to separate both the brackets by space;
2 - numerical comparisons are specified by "-eq" for "equal to", "-neĻ for "not equal to".
So, this line should be:
if [ $? -ne 0 ]; then
I don't know the "wol" command but, the syntax is the same as you use in interactive mode.




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