Linux Shell Scripting Cookbook - Third Edition

Checksum for directories

Checksums are calculated for files. Calculating the checksum for a directory requires recursively calculating the checksums for all the files in the directory.

The md5deep or sha1deep commands traverse a file tree and calculate checksums for all files. These programs may not be installed on your system. Use apt-get or yum to install the md5deep package. An example of this command is as follows:

$ md5deep -rl directory_path > directory.md5

The -r option allows md5deep to recurse into sub-directories. The -l option enables displaying the relative path, instead of the default absolute path.

# -r to enable recursive traversal
# -l to use relative path. By default it writes absolute file
path in output

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