> > "-e" means "if file exists". You should use "-n" That did it!! [root at 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 at u64.u22.net> 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 at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B