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Thanks for this - final line is:

ls -l | tail -3 | awk 'BEGIN {sum=0 ; value=0} { sum+=$5 ; value=$5 } END { if ( sum/3 == value ) { print "equal" ; } else {print "not equal" } }'

on the...

If I am not mistaken this assumes you know the names of the three file to compare.

What I need is a script that assumes you do not know the names "x1" "x2" "x3" at the start.

Say you have a...

I need to determine if any three files have the same file size in a specified directly?

I have got as far as listing the file sizes but where to go from here?

ls -al |sort -n -r +4 | awq...