Linux - GeneralThis Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I want to compare the files present in two filesystems or directory trees, and to list which files are present in one tree but not in the other. I don't think 'diff -r' can be used to directly compare the directories because one of the trees is the root fs on which the other fs (a different partition containing a cpio copy of the root fs) must be mounted.
The only way I can think of is to do: 'cd /; find . > file1' with the second filesystem unmounted, then to mount the second filesystem and do: 'cd 2nd-fs; find . > file2', then to compare file1 to file2.
But the big problem here is that 'diff' lists over 700 lines which are different, although most of them are not missing files! Most of them are just files listed in a different order.
If the first files in both filesystems were different, then every line of the 'find' output from one fs will be different from the same line number in the other 'find' output file, and 'diff' will list all lines as different, even though nearly all the files will be the same. So I want to list only the files listed in one file that are not listed ANYWHERE in the second file.
I'm sure it can be done with 'sed', but just the mention of 'sed' gives me a headache - surely there's an easier way? - please!