sumcheck a whole directory

For some reason files changed on a server. Site down, always fun.
Restored a backup all good. This site did not have git on the server. But I still wanted to monitor the files for changes.

The one I landed on was:

find ./ -type f -name "*.php" -not -path "./wp-content/cache/*" -exec md5sum {} + | sort -k 2 | md5sum

Let’s dissect

What does this command do step by step

find ./ -type f

In the current directory and sub directory, list all files (not directories)

find ./ -type f -name "*.php"

Limit it to php files

find ./ -type f -name "*.php" -not -path "./wp-content/cache/*"

Exclude the files in the caching directory, a bit weird syntax but it’s the one.

find ./ -type f -name "*.php" -not -path "./wp-content/cache/*" -exec md5sum {} +

For each file found run the command md5sum making a sum per file.

find ./ -type f -name "*.php" -not -path "./wp-content/cache/*" -exec md5sum {} + | sort -k 2

Next we sort the output based on filepath+name.
We sort because find might return file order inconsistently.

find ./ -type f -name "*.php" -not -path "./wp-content/cache/*" -exec md5sum {} + | sort -k 2 | md5sum

Finally we create the grand total sumcheck based on all other sumchecks.

Source
Source