You asked: What is difference between DIFF and CMP in Unix?

‘cmp’ and ‘diff’ both command are used to list the differences, the difference between both the command is that ‘cmp’ is used to find the difference between files whereas ‘diff’ is used to find the difference between directories. cmp will list the line and column number that are different between two files.

What does cmp do in Unix?

In computing, cmp is a command-line utility for computer systems that use Unix or a Unix-like operating system. It compares two files of any type and writes the results to the standard output.

What is difference between comm and cmp command in Linux?

Different ways of comparing two files in Unix

#1) cmp: This command is used to compare two files character by character. Example: Add write permission for user, group and others for file1. #2) comm: This command is used to compare two sorted files.

How do you find the difference between two files in UNIX?

There are 3 basic commands to compare files in unix:

  1. cmp : This command is used to compare two files byte by byte and as any mismatch occurs,it echoes it on the screen. if no mismatch occurs i gives no response. …
  2. comm : This command is used to find out the records available in one but not in another.
  3. diff.
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What does cmp return?

When cmp is used for comparison between two files, it reports the location of the first mismatch to the screen if difference is found and if no difference is found i.e the files compared are identical. cmp displays no message and simply returns the prompt if the the files compared are identical.

What is the behavioral difference between cmp and diff commands?

‘cmp’ and ‘diff’ both command are used to list the differences, the difference between both the command is that ‘cmp’ is used to find the difference between files whereas ‘diff’ is used to find the difference between directories. cmp will list the line and column number that are different between two files.

How do I compare two files in linux?

You can use diff tool in linux to compare two files. You can use –changed-group-format and –unchanged-group-format options to filter required data. Following three options can use to select the relevant group for each option: ‘%<‘ get lines from FILE1.

What does 2 mean in linux?

38. File descriptor 2 represents standard error. (other special file descriptors include 0 for standard input and 1 for standard output). 2> /dev/null means to redirect standard error to /dev/null . /dev/null is a special device that discards everything that is written to it.

How do I compare two files side by side in linux?

sdiff command in linux is used to compare two files and then writes the results to standard output in a side-by-side format. It displays each line of the two files with a series of spaces between them if the lines are identical.

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What do the numbers mean in diff?

The first pair of numbers, -11,7 , means that the current hunk in the source file starts at line 11 and has a total of 7 lines. … The second pair of numbers, +11,10 means that the current hunk in the target file starts at line 11 and has a total of 10 lines.

How does Unix diff work?

On Unix-like operating systems, the diff command analyzes two files and prints the lines that are different. In essence, it outputs a set of instructions for how to change one file to make it identical to the second file. This page covers the GNU/Linux version of diff.

What is diff in coding?

Alternatively referred to as compare, diff is short for different or difference and describes a program’s ability to show the difference between two or more files. A diff is an invaluable tool in programming as it enables a developer to see what has changed in-between versions.

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