This question already has an answer here:
I am making a backup of some files and am creating a checksum file,
checksums.txt, to later check the integrity of my data. However pasting each checksum manually into the file is inconvenient since my backup consists of hundreds of files, so asking around I got the suggestion to simplify the process by redirecting the output to the checksum file:
$ md5sum file > checksums.txt
$ sha512sum file > checksums.txt
However doing this replaces the contents of the
checksums.txt file with the checksum of, in this example, the
file file; I would like, instead, to append the checksum of
checksums.txt without deleting its contents. So my question is: how do I do this?
Just one more thing. Since I am a basic user, try (only if possible) to make easy-to-follow suggestions.