What is the output of diff?
What is the output of diff?
The diff command is invoked from the command line, passing it the names of two files: diff original new . The output of the command represents the changes required to transform the original file into the new file. If original and new are directories, then diff will be run on each file that exists in both directories.
When two files are identical What is the output of diff command?
When two files are identical, what is the output of diff command? Explanation: When two files are identical, diff command does not produce any output. It simply returns the shell prompt $. However, we can use the -s option to display an informative message on the terminal if the files are identical.
What is the use of diff command?
The Linux diff command is used to compare two files line by line and display the difference between them. This command-line utility lists changes you need to apply to make the files identical.
How can I find the difference between two files?
Comparing files (diff command)
- To compare two files, type the following: diff chap1.bak chap1. This displays the differences between the chap1.
- To compare two files while ignoring differences in the amount of white space, type the following: diff -w prog.c.bak prog.c.
What do the numbers mean in diff?
– means “old”, as we usually invoke it as diff -u old new . +1,4 means that this piece of the second file starts at line 1 and shows a total of 4 lines. Therefore it shows lines 1 to 4. + means “new”. We only have 4 lines instead of 6 because 2 lines were removed!
What is the output of diff command in Unix?
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.
What is the exit status of the file if both files will be identical?
Clarification: The exit status of cmp command is 0 if both the files are identical and 1 if both the files are different. The exit status is 2 if the program encounters a problem.
How do I create a diff file?
This article explains how to create a patch for a single file or for a whole directory using diff and how to apply this patch after….Create a Patch for a Directory in Linux.
| Option | Description |
|---|---|
| -r | Recursively compare any subdirectories found |
| -u | Create a diff file in the unified format |
| -N | Treat absent files as empty |
How do I diff files in Windows?
Start Windiff.exe. On the File menu, click Compare Files. In the Select First File dialog box, locate and then click a file name for the first file in the comparison, and then click Open. In the Select Second File dialog box, locate and then click a file name for the second file in the comparison, and then click Open.
What do numbers mean in a patch file?
The numbers after the comma are the number of affected lines in each file. Every time you remove a line, the +r number will be smaller than -r . Every time you add a line, the +r number will be bigger than -r. Changing a line will add 0 to the +r number. ( same scope of lines)
What are the @@ and the numbers in git?
The @ signs are just delimiters. 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 starting line can be confirmed in any editor: $this->name = $name; really is the 11th line in the edited file. That’s easy.