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thanks a lot for all your help its works now.

Hello Devendra,

Your Input data as per first post is as follows.(in which there is only 1 line not 2 fields at each line, I made a slight change in that to show you that code is not properly...

Try alsoawk '!(NR%2) {if ($1 > MAX) MAX=$1} END {print MAX}' RS=" " file
5

Hello Devendra,

Could you please try following and let me know if this helps you.

awk '{for(i=1;i<=NF;i++){if(i%2==0){A[j]=A[j]>$i?A[j]:$i} if(i%2!=0){j=$i}}} END{for(u in A){print u OFS...

Can you add Code tags?

Do you want max of X for each timestamp or for entire input?

According to the standards, options must appear on a command line before operands. On most systems getopts enforces that requirement as you have found. There are ways to get around that, but since...

Hello Devendra,

I have figured it out(sorry for confusion), we need to give complete path while deleting the directories while passing it from awk to sh as follows.

####To delete the...

Hello Devendra,

Code given in POST#5 is working fine for me, not sure(surprised) why it is not working for you.
Let me know if you got any error after executing it. The only difference between...

Thanks for the fix, Don. I had typed that in a hurry.
I guess it was the second suggestion that worked.
Another suggestion, do the cd in a sub shell so it does not harm the main shell:
(cd $TGTDIR...

OK. So the ls -t $TGTDIR gives you filenames in $TGTDIR, not absolute pathnames. So you either removed files (of any type; not necessarily directories) in the directory where you ran this script...

One last time:
In what way did the command: rm -rf `ls -t $TGTDIR | awk 'NR>5'` "not work"?

Hello Devendra Hupri,

Seems to me a permission issue, could you please confirm/make sure you have proper permissions to the directories,
let us know the error messages in case you have queries....

I repeat:
What shell are you using?

In what way did the command:rm -rf `ls -t $TGTDIR | awk 'NR>5'` "not work"? If it produces diagnostic messages, show them to us (in CODE tags).

What operating system and shell are you using?

In what way did it not work?

Are there any files other than directories in the directory named by $TGTDIR? Could non-directory files in $TGTDIR...

Hello Senhia,

I didn't test your code but rmdir will work only if directories are empty(User didn't mention here about the same either directories are empty or not).

Hello Devendra Hupri,
...

Variants of your quick-and-dirty command
rm -rf `cd $TGTDIR && ls -t | awk 'NR>5'`
rm -rf `ls -dt $TGTDIR/* | awk 'NR>5'`

Not tested, but maybe some form of the following might work ? Please try on a dummy set first..
Waiting on a second opinion

find /TGTDIR/ -maxdepth 1 -type -d -name '*' -print0 | xargs -r0 ls -t...

Hello Devendra Hupri,

Welcome to forum, following may help you in same.
1st command:

TGTDIR=/tmp ##For ust an example
ls -ltr $TGTDIR | awk '/^d/ {A++;X[++j]=$NF}...