Aggregate variables bdfore ssh into remote host

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# 1  
Old 02-17-2014
Aggregate variables bdfore ssh into remote host

Hi all,

I have a problem where i'm trying to identify on which remote hosts the apps are running, ssh into it and restart them.

In case more than 1 apps is running on same remote host, i want to be able to group it and ssh only once.


app1 =
app2 =
app3 =
app4 =

Any thoughts?

I have played with the arrays but couldn't figure out.

Thank you for your help.

---------- Post updated 02-17-14 at 09:39 AM ---------- Previous update was 02-16-14 at 11:56 PM ----------

the complexity is in that i don't want to do multiple if else for each permutations

app1 = app2
app1 = app3
app1 = app4
app2 = app3
app2 = app4
app3 = app4

Hope is not too hard to achieve it.

Last edited by Scott; 02-17-2014 at 01:45 PM.. Reason: Code tags
# 2  
Old 02-17-2014
Not sure if i understood correctly, but this may helps:
# awk  '{a[$NF]=sprintf("%s%s ",a[$NF],$1)}END{for (i in a){print i,a[i]}}' infile app1 app3 app2 app4

This User Gave Thanks to Klashxx For This Post:
# 3  
Old 02-17-2014
Thanks a lot!

any chance you can explain the line, mainly the first part before the END?

---------- Post updated at 11:55 AM ---------- Previous update was at 11:43 AM ----------

No need as i figured out,

thanks again !!

---------- Post updated at 05:42 PM ---------- Previous update was at 11:55 AM ----------

Originally Posted by Klashxx
Not sure if i understood correctly, but this may helps:
# awk  '{a[$NF]=sprintf("%s%s ",a[$NF],$1)}END{for (i in a){print i,a[i]}}' infile app1 app3 app2 app4

One more question please ...

for the above code, is it possible to write it to unique file based on the first argument - in our case i ?


Code: app1 app3 > app2 > app4 >


Last edited by Scott; 02-17-2014 at 01:46 PM.. Reason: Code tags
# 4  
Old 02-17-2014
awk '
                A[$NF] = A[$NF] ? A[$NF] FS $1 : $1
        END {
                for ( k in A )
                        print k, A[k] > k "_txt"
' file

# 5  
Old 02-18-2014
If you want to use the same script:
awk  '{a[$NF]=sprintf("%s%s ",a[$NF],$1)}END{for (i in a){print i,a[i] > i"_txt"} }' infile

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