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Need help to find difference between two files

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Operating Systems Solaris Need help to find difference between two files
# 1  
Old 05-26-2010
Error Need help to find difference between two files
I need to find the difference between two files in UNIX. I tried diff, but couldn't get it right.

There are two files:

file1:
Code:
       apple
       mango
       strawberry
       banana
       grape

file2:
Code:
       grape
       apple
       banana

I need an output file like below:
Code:
       mango
       strawberry

Can anyone please help? Thanks in advance...
Last edited by Yogesh Sawant; 05-26-2010 at 04:00 AM.. Reason: added code tags
# 2  
Old 05-26-2010
while read line;do
Code:
while read line;do
grep -qw "$line"  FILE2
[$? -ne 0 ] && { echo "$line" } 
done < FILE1

# 3  
Old 05-26-2010
You could also try:
Code:
$ grep -vf file2 file1
mango
strawberry

# 4  
Old 05-26-2010
Quote:
Originally Posted by rrstone
while read line;do
Code:
while read line;do
grep -qw "$line"  FILE2
[$? -ne 0 ] && { echo "$line" } 
done < FILE1


The following error occurs:
syntax error at line 7: `done' unexpected

---------- Post updated at 12:15 PM ---------- Previous update was at 12:14 PM ----------
Quote:
Originally Posted by scottn
You could also try:
Code:
$ grep -vf file2 file1
mango
strawberry

This error occurs:
grep: illegal option -- f
Usage: grep -hblcnsviw pattern file . . .
# 5  
Old 05-26-2010
I only said you could try Smilie

Code:
$ awk 'NR==FNR { F[$1]=1; next } !F[$1]' file2 file1
mango
strawberry

There's a space missing from rrstone's test is all:
Code:
[$? -ne 0 ]

should be
Code:
[ $? -ne 0 ]

edit: PS, if you're using Solaris, use /usr/xpg4/bin/awk or nawk
Last edited by Scott; 05-26-2010 at 03:24 AM..
# 6  
Old 05-26-2010
"The following error occurs:
syntax error at line 7: `done' unexpected"

I am sorry , there are 4 lines in my script .
# 7  
Old 05-26-2010
Quote:
Originally Posted by scottn
I only said you could try Smilie

Code:
$ awk 'NR==FNR { F[$1]=1; next } !F[$1]' file2 file1
mango
strawberry

There's a space missing from rrstone's test is all:
Code:
[$? -ne 0 ]

should be
Code:
[ $? -ne 0 ]


I guess today is my error day!!!
awk 'NR==FNR { F[$1]=1; next } !F[$1]' file2 file1
F[: Event not found.

---------- Post updated at 12:26 PM ---------- Previous update was at 12:24 PM ----------
Quote:
Originally Posted by rrstone
"The following error occurs:
syntax error at line 7: `done' unexpected"

I am sorry , there are 4 lines in my script .
Well, actually this was the script I wrote:
#!/bin/sh

while read line
do
grep -qw "$line" file2
[$? -ne 0 ] && { echo "$line" }
done < file1

---------- Post updated at 12:28 PM ---------- Previous update was at 12:26 PM ----------
Quote:
Originally Posted by scottn
I only said you could try Smilie

Code:
$ awk 'NR==FNR { F[$1]=1; next } !F[$1]' file2 file1
mango
strawberry

There's a space missing from rrstone's test is all:
Code:
[$? -ne 0 ]

should be
Code:
[ $? -ne 0 ]

edit: PS, if you're using Solaris, use /usr/xpg4/bin/awk or nawk

The same error occurs, even if the space problem is resolved
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