Ubuntu – Create checksum sha256 of all files and directories

checksumscommand linefiles

I need to create a list of checksums of the files that are inside a directory, including any subdirectories.

The command that I try to execute is the following:

 sha256sum -b *

Usage:


 -b = Read in Binary.

 * = Specifies that you must verify all file extensions.

With the command I get the following output:

sha256sum: test0: Is a directory
e3d748fdf10adca15c96d77a38aa0447fa87af9c297cb0b75e314cc313367daf *test1.txt
db0c7a354881fe2dd1b45642a68f6a971c7421e8fdffe56ffa7c740111e07274 *test2.txt

Instead of reporting that test0 is a directory, you should also generate the checksum of the content.

Do you recommend always using -b in any type of file? In what cases should -t be used?

Is it possible to filter the types of files I want to omit in the verification, without having to add all the files I want to admit? What command should I execute?

I looked for help but I do not find anything related.

Best Answer

You can use find to find all files in the directory tree, and let it run sha256sum. The following command line will create checksums for the files in the current directory and its subdirectories.

find . -type f -exec sha256sum {} \;

I don't use the options -b and -t, but if you wish, you can use -b for all files. The only difference that I notice is the asterisk in front of each file name.

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