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Shell Programming and Scripting
Comparing two files and appending only missing lines.
Post 302185945 by Karthick333031 on Wednesday 16th of April 2008 06:48:02 AM
04-16-2008
Comparing two files and appending only missing lines.
Hi All,
I am a newbie to Shell scripting. Please help me with the Following problem,
1. I have two files with the same name in different locations in the same machine.
Eg: /root/testfolder/a ---- location 1
/tmp/testfolder/a ----- location 2
2. I want to compare the files in location 1 and location 2.
Eg: diff /root/testfolder/a /tmp/testfolder/a
(Please suggest the best way using diff )
3. I must append only the lines missing in location 1(i.e. /root/testfolder/a) without losing any content of location 1.
Eg:
File in location 1
/root/testfolder/a)
Added line in Location 1
This is a test Script
But i am stuck.Please help
This is Added line to LOCATION 1(/root/testfolder/a)
File in location 2/tmp/testfolder/a)
Added Line in the Location 2 (/tmp/testfolder/a)
This is a test Script
But i am stuck.Please help
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
Executing diff command:
diff /root/testfolder/a /tmp/testfolder/a
Say output of the diff command looks like this:
1c1
< Added line in Location 1 (/root/testfolder/a)
---
> Added Line in the Location 2 (/tmp/testfolder/a)
4c4
< This is Added line to LOCATION 1(/root/testfolder/a)
---
> This is added line for testing in LOCATION 2(/tmp/testfolder/a)
Here,
I am concerned only to append those lines starting with ">" to the correct lines of /root/testfolder/a
Expected result in /root/testfolder/a
Added Line in the Location 2 (/tmp/testfolder/a)
Added line in Location 1
This is a test Script
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
But i am stuck.Please help
Please help me develop a shell script to solve the above posted problem.
Thanks in advance
Karthick.
I am a newbie to Shell scripting. Please help me with the Following problem,
1. I have two files with the same name in different locations in the same machine.
Eg: /root/testfolder/a ---- location 1
/tmp/testfolder/a ----- location 2
2. I want to compare the files in location 1 and location 2.
Eg: diff /root/testfolder/a /tmp/testfolder/a
(Please suggest the best way using diff )
3. I must append only the lines missing in location 1(i.e. /root/testfolder/a) without losing any content of location 1.
Eg:
File in location 1
/root/testfolder/a)Added line in Location 1
This is a test Script
But i am stuck.Please help
This is Added line to LOCATION 1(/root/testfolder/a)
File in location 2
/tmp/testfolder/a)Added Line in the Location 2 (/tmp/testfolder/a)
This is a test Script
But i am stuck.Please help
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
Executing diff command:
diff /root/testfolder/a /tmp/testfolder/a
Say output of the diff command looks like this:
1c1
< Added line in Location 1 (/root/testfolder/a)
---
> Added Line in the Location 2 (/tmp/testfolder/a)
4c4
< This is Added line to LOCATION 1(/root/testfolder/a)
---
> This is added line for testing in LOCATION 2(/tmp/testfolder/a)
Here,
I am concerned only to append those lines starting with ">" to the correct lines of /root/testfolder/a
Expected result in /root/testfolder/a
Added Line in the Location 2 (/tmp/testfolder/a)
Added line in Location 1
This is a test Script
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
But i am stuck.Please help
Please help me develop a shell script to solve the above posted problem.
Thanks in advance
Karthick.
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LEARN ABOUT MOJAVE
bdiff
bdiff(1) User Commands bdiff(1) NAME
bdiff - big diff SYNOPSIS
bdiff filename1 filename2 [n] [-s] DESCRIPTION
bdiff is used in a manner analogous to diff to find which lines in filename1 and filename2 must be changed to bring the files into agree- ment. Its purpose is to allow processing of files too large for diff. If filename1 (filename2) is -, the standard input is read. bdiff ignores lines common to the beginning of both files, splits the remainder of each file into n-line segments, and invokes diff on cor- responding segments. If both optional arguments are specified, they must appear in the order indicated above. The output of bdiff is exactly that of diff, with line numbers adjusted to account for the segmenting of the files (that is, to make it look as if the files had been processed whole). Note: Because of the segmenting of the files, bdiff does not necessarily find a smallest sufficient set of file differences. OPTIONS
n The number of line segments. The value of n is 3500 by default. If the optional third argument is given and it is numeric, it is used as the value for n. This is useful in those cases in which 3500-line segments are too large for diff, causing it to fail. -s Specifies that no diagnostics are to be printed by bdiff (silent option). Note: However, this does not suppress possible diagnos- tic messages from diff, which bdiff calls. USAGE
See largefile(5) for the description of the behavior of bdiff when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). FILES
/tmp/bd????? ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWesu | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ SEE ALSO
diff(1), attributes(5), largefile(5) DIAGNOSTICS
Use help for explanations. SunOS 5.10 14 Sep 1992 bdiff(1)