Check file differences in Linux

Following Linux command can be used to check two file line differences.
Before using the command you must sort the file using sort Linux command.

1.) sort err_file_1.txt > sorted_file_1.txt
2.) sdiff err_file_1.txt err_file_2.txt

Output will be shown in Linux terminal. You can write output to file using following command.

1.) sdiff err_file_1.txt err_file_2.txt >output.txt