比较Linux中2个文件的不同单词

Question

I have two files like below

file1 has the below words

word23.cs
test.cs
only12.cs

file 2 has the below words

word231.cs
test.cs
only12.cs 

The above words might change, And now i need to compare the two files using script or linux command to get the different word , i need to compare the file2 with file1 and need to get the output as word23.cs

Thank you

Answer 1

You can use comm , diff or cmp command to find different word from files.

Also this trick can work with a grep command as follows

grep -Fwf file1 file2

Answer 2

Use the "diff" command to compare 2 files:

$ diff a.txt b.txt

Or, for a unified diff:

$ diff -u a.txt b.txt

Use -u0 for a unified diff without context.