Difference output of files

Shell Programming and Scripting
1

Need help on below req

Compare two files and send difference of file to other file

File2 is static which never changes

ex:

File1

A.txt
B.ttx
C.txt
E.txt

File2

A.txt
B.txt
C.txt
D.txt

Req:

i need to get two output files

1) File 2 has "D.txt" where File1 does not have "D.txt" then I should get "D.txt" to new files > file3.txt

2)In file1 E.txt is total new file I should get "E.txt" has output to new file > File4.txt

2

Hello,

Following commands may help you, also please always use code tags while posting commands and codes.

awk 'NR==FNR{a[$1]=$1;next} !($1 in a){print $1 > "File2_to_File1_differance"}' file1_details_check1211231 file_details_check12111232
awk 'NR==FNR{a[$1]=$1;next} !($1 in a){print $1 > "File1_to_File2_differance"}' file_details_check12111232 file1_details_check1211231

It will create File2_to_File1_differance and File1_to_File2_differance 2 output files for same. Where file1_details_check1211231 is file1 and file_details_check12111232 is file2.

Thanks,
R. Singh

3

Thanks for reply

its not working!

file2_file1 diff -> getting out all value in file2, same as for file1_file1diff

our env is linux

4

Sathish,

Could you please use the following commands and output files will have as follows.

awk 'NR==FNR{a[$1]=$1;next} !($1 in a){print $1 > "File2_to_File1_differance"}' file1_details_check1211231 file_details_check12111232
 
 cat File2_to_File1_differance
D.txt
 
awk 'NR==FNR{a[$1]=$1;next} !($1 in a){print $1 > "File1_to_File2_differance"}' file_details_check12111232 file1_details_check1211231
 
cat File1_to_File2_differance
E.txt

Also I am concendring in file 1 b.ttx is a typo. So I have taken it as b.txt .

Thanks,
R. Singh

5

working fine!

Thanks

6

Although I find your file names very strange (some with an upper case F , some with a lower case f , some ending with .txt , and some not having any filename extension), the following single awk command seems to do what you want:

awk '
FNR == NR {
	a[$1]
	next
}
{	if($1 in a)
		delete a[$1]
	else	print $1 > "file3.txt"
}
END {	for(i in a)
		print i > "File4.txt"
}' File1 File2

With File1 and File2 as specified in post #1 in this thread, it writes the following to file3.txt :

B.txt
D.txt

and writes the following to File4.txt :

B.ttx
E.txt

If you want to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk , /usr/xpg6/bin/awk , or nawk .

Note that unlike RavinderSingh13's awk scripts, the order of output lines in File4.txt from the above script is random rather than in the order in which they appear in the input file. The output in file3.txt should be the same either way.

7

Thanks for ur reply Don!

Its working