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How to Compare two files

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# 1  
Old 09-07-2010
How to Compare two files
Hi,

I have two files with me.
Code:
f1.txt
-rwxr-----   1 mr459s   other         7505951 May 21 09:04 a1.gz
-rw-r-----   1 mr459s   other        16419332 May 24 03:54 a2.gz
-rw-r-----   1 mr459s   other            1001 May 24 03:54 a3.gz
-rwxr-----   1 mr459s   other             298 May 25 08:49 a4.gz
-rwxr-----   1 mr459s   other        22657154 May 28 05:52 a5.gz
-rwxr-----   1 mr459s   other       129274887 May 28 05:56 a6.gz
-rwxr-----   1 mr459s   other       355929421 May 28 05:56 a7.gz
-rwxr-----   1 mr459s   other       289019287 May 28 05:56 a8.gz

f2.txt
07-25-10  05:15PM              7505951 a1.gz
07-25-10  05:14PM             16419332 a2.gz
07-25-10  05:14PM                 1001 a3.gz
07-25-10  05:15PM                  298 a4.gz
07-25-10  05:14PM             22657154 a5.gz
07-25-10  05:39PM            129274887 a6.gz
07-25-10  05:38PM            355929421 a7.gz
07-25-10  05:35PM            289019287 a8.gz

Basically i have to compare the size of each file listed(8 files) in f1.txt to files listed in f2.txt and put result in another file. The sequence of the files are not constant.

I tried a lot but did not get much. So could any one please suggest how to do this.

Thanking in advance.
Last edited by tarakant; 09-07-2010 at 09:22 AM..
# 2  
Old 09-07-2010
Provide expected output
# 3  
Old 09-07-2010
OP should be like this

Code:
FileName        size in f1.txt             size in f2.txt
a1.gz            7505951                   7505951

continueing....
# 4  
Old 09-07-2010
Code:
 awk 'NR==FNR{a[$NF]=$5;next} {printf "%-10s%-10d%-10d\n", $NF,a[$NF],$3}' f1.txt f2.txt

Last edited by rdcwayx; 09-07-2010 at 09:28 AM..
# 5  
Old 09-07-2010
try this,

Code:
awk 'BEGIN{printf "%-10s%-13s%-13s\n","filename","size in F1","Size in F2"}NR==FNR{a[$9]=$5;next} { if ($4 in a) { printf "%-10s%-10d%-10d\n",$4,a[$4],$3}}' f1 f2

# 6  
Old 09-07-2010
without header
Code:
join -1 9 -2 4 f1.txt f2.txt | cut -d' ' -f1,6,12

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tarakant
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