>
> "-e" means "if file exists". You should use "-n"
That did it!!
[root@web1:~] #./bin/check-cass.sh
Cassandra is running with pid: 26979
This is what the script looks like now:
#!/bin/bash
pid=$(ps -ef | grep cassandra | grep -v grep | grep -i -v -e grep -e screen
-e s3fs|awk '{print $2}')
if [[ -n $pid ]]
then
echo "Cassandra is running with pid: $pid"
else
echo "Cassandra is DOWN!!!"
fi
Insert an extra line after #!/bin/bash
> set -xv
> which will show helpful debug messages.
Good tip! But I ran the script with sh +x . I guess that running it with sh
+xv would do the same thing. But that is a useful tip to include the debug
lines right in the script. I'll have to remember that for next time!
Thanks! :)
Tim
On Sun, Apr 19, 2015 at 1:55 PM, Always Learning <centos@xxxxxxxxxxx> wrote:
>
> On Sun, 2015-04-19 at 13:15 -0400, Tim Dunphy wrote:
> > Hey all,
> >
> > I wrote a very basic script to determine if cassandra db is running. I'm
> > setting a variable called 'pid' to the output of a ps | grep like to grab
> > the pid of the cassandra process.
>
> Insert an extra line after #!/bin/bash
>
> set -xv
>
> which will show helpful debug messages.
>
>
> --
> Regards,
>
> Paul.
> England, EU. Je suis Charlie.
>
>
> _______________________________________________
> CentOS mailing list
> CentOS@xxxxxxxxxx
> http://lists.centos.org/mailman/listinfo/centos
>
--
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