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dfcd5ffaba
Describe how to use the two new context and unified format options in the diff utility. Also change the example comparison of two files so they contain more lines as that is much more interesting (and useful).
898 B
898 B
Name
diff - compare files line by line
Synopsis
$ diff [options...] [files...]
Description
Compare files line by line.
Arguments
files: files to compare ex:file1 file2
Options
-u,-U <context>,--unified <context>: Write diff in unified format with<unified>number of surrounding context lines (default 3).-c,-C <context>,--context <context>: Write diff in context format with<context>number of surrounding context lines (default 3).
Examples
First we create two files to compare:
$ printf '1\n2\n3\n' > file1
$ printf '1\nb\n3\n' > file2
Here's how to view differences between the two files in normal format:
$ diff file1 file2
2c2
< 2
---
> b
Here's how to view differences between the two files in unified format:
$ diff -u file1 file2
--- file1
+++ file2
@@ -1,3 +1,3 @@
1
-2
+b
3