recursive file integrity checking using openssl dgst

file_check.md

Recursive File Integrity Checking using openssl dgst

Checksumming

Use find to iterate trought all subdirectories of the given path (./). openssl dgst -sha256 each file in each directory and add the output to the SHA256 file in the corresponding directory.

find ./ -type d -exec sh -c 'cd "{}"; find ./ -maxdepth 1 -type f -not -name SHA256 -exec openssl dgst -sha256 \{\} + | sort -u | tee SHA256' \;

Checking

openssl dgst -sha256 each file in each directory and try to find the checksum in the SHA256 file.

find ./ -type d -exec sh -c 'cd "{}"; find ./ -maxdepth 1 -type f -not -name SHA256 -exec openssl dgst -sha256 \{\} + | grep -o "[0-9a-f]\{64\}" | grep -f - SHA256 -q || echo "$(</dev/stdin) not found in SHA list"' \;