Shell Programming and Scripting

awk '
BEGIN {FS="/"}
FNR==NR {arr[$0]=$0;next}
{arr2[$4]=$4}
END {
  for(i in arr) {
    if (!arr2[i]) {
      print "error: entry " arr[i] " has no entry in file2"
    }
  }
}' "file1" "file2"

awk 'NR==FNR{x[$NF];next}
{print ($1 in x)?$1:"error: entry "$1" has no entry in file2"
}' FS="/" file2 file1

awk 'NR==FNR{x[$NF];next}
!($1 in x)&&$0="error: entry "$1" has no entry in file2"
' FS="/" file2 file1

cat file1 | while read key
do
  grep "/vol/vx/$key$" file2 2>&1 >/dev/null # Some systems may accept "grep -q".
  [ $? -ne 0 ] && echo "error: entry $key has no entry in file2"
done

a:
data01
data02
data03
data04
data05
b:
/vol/vx/data01
/vol/vx/data02
/vol/vx/data05

No entry for:data03
No entry for:data04

nawk 'BEGIN{FS="/"}
{
if (NR==FNR) 
	test[NR]=$4
else
{
	flag=0
	for (i in test)
	{
		if ($1==test[i]) 
			flag=1
	}
	if (flag==0)
		print "No entry for:"$1
}
}' b a

#!/usr/bin/env bash

# @(#) s1       Demonstrate feature.

set -o nounset
echo

debug=":"
debug="echo"

## Use local command version for the commands in this demonstration.

echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version bash sort cut comm sed

echo

echo " Input file data1:"
cat data1

echo
echo " Input file data2:"
cat data2

echo
echo " Results:"
comm -23 <( sort data1 ) <( cut -d/ -f4 data2 | sort ) |
sed -e 's/^/ No entry for: /'

exit 0

% ./s1

(Versions displayed with local utility "version")
GNU bash 2.05b.0
sort (coreutils) 5.2.1
cut (coreutils) 5.2.1
comm (coreutils) 5.2.1
GNU sed version 4.1.2

 Input file data1:
data01
data02
data03
data04
data05

 Input file data2:
/vol/vx/data01
/vol/vx/data02
/vol/vx/data05

 Results:
 No entry for: data03
 No entry for: data04