Change Ownership to Specific User
chown <user> <file>
chown <user> <dir>
# -R: Recursive
chown -R <user> <dir>
Examples
chown tester example.txt
chown tester ./example
chown -R tester ./example
Change Ownership to Specific Group
chown :<group> <file>
chown :<group> <dir>
# -R: Recursive
chown -R :<group> <dir>
Examples
chown :testers example.txt
chown :testers ./example
chown -R :testers ./example
Change Ownership to Specific User&Group
We can give ownership of file/directory to specific both use and group at the same time.
chown <user>:<group> <file>
chown <user>:<group> <dir>
# -R: Recursive
chown -R <user>:<group> <dir>
Examples
chown tester:testers example.txt
chown tester:testers ./example
chown -R tester:testers ./example