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Top Forums Shell Programming and Scripting Compare two text files and output difference Post 302690351 by martin0852 on Thursday 23rd of August 2012 12:35:23 AM
Old 08-23-2012
Compare two text files and output difference

Hi experts,

I am trying to compare two text files and output the difference to another file.
I'm not strictly looking for differences in text but additional text at the end of one file that isn't in another, so basically comparing the file 2 against file 1 and printing any additional text to file 3.

Code
Code:
# Tool number
toolnr=`uname -n | cut -c2-`

# Log Directory Path
LOG_path="/usr/asm/atl.1001/user_data/error_logs"

# Input file names
file1="ASML_LOGBOOK.TXT"
file2="ASML_LOGBOOK_2.TXT

diff ${file1} ${file2} |grep "^<" > ${LOG_path}/LOG${toolnr}.TXT

the following is an error output when I run the script:
Error code:
> /usr/asm/atl.1001/user_data/error_logs/LOG1001.TXT^J^J^J: cannot open


Any help greatly appreciated!
 

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DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
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