Help with multiple for loops

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# 1  
Old 02-06-2014
Help with multiple for loops

I have set up ssh trust between 3 machines. The aim is to connect from machine-A to B and C and clear the txt files in tmp on all 3 machines. And, I have 3 environments and each environment has 2 hosts. So I should be able to run this script on any environment.

Here is the logic:
I want to see if my current hostname is part of any of these 3 sections/environments, if yes, then go into that section only and do stuff. That is clear the txt only for that section and exit out.

But this isnt working as expected. It does the job but after clearing the txt, it moves onto next section/environment instead of exiting out.

I think nested for isnt working as expected or maybe I shouldnt use nested for in the first place! Please let me know if you have any better ideas to make this work.

Here is the script:

##This script will clear the txt in tmp in both local and remote locations

echo "Clearing txt for Test Domain..."
echo $host;

for $(hostname) in $EXTSSSERVERLIST;
                for f in $(echo $EXTSSSERVERLIST | tr "," " ");
                        ssh $f "rm -rf /tmp/*.txt"

for $(hostname) in $APPSSSERVERLIST;
                for f in $(echo $APPSSSERVERLIST | tr "," " ");
                        ssh $f "rm -rf /tmp/*.txt"

for $(hostname) in $FAASSSERVERLIST;
        for f in $(echo $FAASSSERVERLIST | tr "," " ");
                ssh $f "rm -rf /tmp/*.txt"

Moderator's Comments:
Mod Comment It appears that several moderators have edited your posts to add CODE tags for you. Please add CODE tags when you submit posts rather than depending on moderators to clean things up for you.

Last edited by Don Cragun; 02-06-2014 at 08:35 PM.. Reason: Add CODE tags.
# 2  
Old 02-06-2014
To assist other posters:

Which Operating System and Version are you running?
Which Shell have you written the code for?
Is there a link on your computer from /bin/sh to another (non-Bourne) Shell?
# 3  
Old 02-06-2014
It is Redhat linux. and /bin/sh and there is no link to any other shell

# 4  
Old 02-06-2014
To test if your hostname is in a list you should use something like this:

if echo $EXTSSSERVERLIST | grep -wq $host
                for f in ${EXTSSSERVERLIST//,/ }
                        ssh $f "rm -rf /tmp/*.txt"

# 5  
Old 02-06-2014
Note that a line of the form:

has absolutely no effect on a script unless it is the first line in the script.
# 6  
Old 02-07-2014
Thanks to all

Special thanks to chubler. The code worked perfectly. I am trying it out on other hosts now and will also do some extensive testing before I make it more dynamic.

I am planning to make it more dynamic and use this script to do repeated things like clearing cache, files et al on remote hosts.
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