The GNU diff command on most Linux and UNIX systems will diff the contents of two files. With Bash, you can, using process substitution, take the output of any arbitrary command and process its input, or output, as a file descriptor. In this way, you can then use diff against the output of two commands as follows
diff <(cmd1) <(cmd2)
Both cmd1
and cmd2
will appear as a file name/file descriptor. The <
character indicates that the file descriptor should → Continue reading “Diffing the output of two commands”