Can chown be used with wildcards?

Yes, the chown command can be used with wildcards in Linux. For example, you can change the ownership of multiple files that match a certain pattern. Here’s an example:

hdfs dfs -chown new_user /home/hadoop/underwater/*.txt

In this command, all .txt files in the specified directory will have their ownership changed to new_user. Just ensure that you use wildcards carefully to avoid unintended changes.