File comparision


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting File comparision
# 1  
Old 03-19-2010
File comparision

Hi All
I have to files
Code:
cat a.txt
AAA
BBB
CCC
DDD

and
Code:
cat b.txt
AAA
CCC
EEE

i want to compare these two files and o/p should have content of file a.txt which is not in file b.txt
Code:
c.txt 
BBB
DDD

Please help me
# 2  
Old 03-19-2010
Try this ,

Code:
diff a.txt  b.txt  | grep "^<" | sed -r "s/< (.+)/\1/g" >c.txt

# 3  
Old 03-19-2010
See the man page of grep:
Code:
$ grep -vf b.txt a.txt
BBB
DDD

# 4  
Old 03-19-2010
Try this,

Code:
comm -13 b.txt a.txt >c.txt

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

File comparision with AWK / SED

Hi all I need to compare two separate product lists that are changed weekly. New products are added, old products are removed and prices change. I have found various Windows programs that do this function but it's not as clean as I like and just wondered if there was a simpler way with... (1 Reply)
Discussion started by: mrpugster
1 Replies

2. Shell Programming and Scripting

File Comparision

Hi All, I want to write a script which will compare two files and tell me if the files are different. Actually my files will be same but order of lines will be different,so diff is not working. I have written a script to do this:- while read line; do cnt=`grep -i $line... (6 Replies)
Discussion started by: prasson_ibm
6 Replies

3. Shell Programming and Scripting

File comparision

Hi All I have to files cat a.txt AAA BBB CCC DDD and cat b.txt AAA CCC EEE i want to compare these two files and o/p should have content of file a.txt which is not in file b.txt c.txt BBB DDD Please help me (1 Reply)
Discussion started by: aaysa123
1 Replies

4. Shell Programming and Scripting

Date Comparision in the File

Hi All, I have thefollowing files in the directory inbox/sat ras.sat.trn.20090103.001902.00004358 ras.sat.trn.20090612.001903.00005339 ras.sat.trn.20090723.001902.00004358 The above file contains the date of the file creation. We just need to write a ksh shell script to check the... (5 Replies)
Discussion started by: satheesh_color
5 Replies

5. Shell Programming and Scripting

File comparision

HI, I would like to know how to compare two files and replace non-matching lines with "_" . I can get non-mathing lines with grep -v -f file1 file2 i just want to knw how to display 'file2' with non-matching lines from 'file1' replaced by "_" for exmaple file1: a b c d ... (2 Replies)
Discussion started by: maddy81
2 Replies

6. Shell Programming and Scripting

Email sending attachement with two file comparision

Hi guys, I have two files . One file contains log record and another file contains emailids which is supposed to send it users File1 : Name : abc_xyz_data.txt Which contains log record File 2 : Name : abc_xyz_mailids.txt Which contains emailids. abc@test.com bcd@test.com I... (4 Replies)
Discussion started by: orabalu
4 Replies

7. Shell Programming and Scripting

file comparision by line

i have two files and i want to compare these two it shoud print those lines which are not in 2nd file a.txt 1236,AB,0 2345,CD,1 5679,EF,1 9123,AA,1 9223,AA,0 b.txt 1234,AB,0 2345,CD,1 5678,EF,1 9123,AA,0 o/p 1236,AB,0 5679,EF,1 9123,AA,1 9223,AA,0 (6 Replies)
Discussion started by: aaysa123
6 Replies

8. Shell Programming and Scripting

file size comparision local file and remote file

Hi, I have written a script which would FTP a dump file to the FTP server and log the whole activity into a file. to confirm the success of the file copy i grep for "226 file receive OK" and then send out an email saying success. Now i want to make sure the bytes of the local file and... (4 Replies)
Discussion started by: dba.admin2008
4 Replies

9. Shell Programming and Scripting

Unix File Comparision

I have a file named file1 which contains numbers in sequence like... 1 2 3 7 8 Then i have file File 2 that contains 4 5 ........so i need to compare both files so that i can find out the missing entry in the sequence is 6.......These files are flat files which contain and so i need to... (5 Replies)
Discussion started by: coolguy01
5 Replies

10. Shell Programming and Scripting

File Comparision by using Shell Script

Hello All, I am trying to find 2 file comparision by using Shell Script. For example, I am having 2 directories namely DAY1 & DAY2. DAY1 directory contains file1.dat, file2.dat, file3.dat, file4.dat, file5.dat & DAY2 directory contains file1.dat, file2.dat, file3.dat, file4.dat, file5.dat. Now,... (3 Replies)
Discussion started by: nvkuriseti
3 Replies
Login or Register to Ask a Question