Display the values of keys and subkeys in the registry. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/reg-query.
reg query key_name
reg query key_name /v value
reg query key_name /s
reg query key_name /f "query_pattern"
reg query key_name /t REG_SZ|MULTI_SZ|EXPAND_SZ|DWORD|BINARY|NONE
reg query key_name /d
reg query key_name /f "query_pattern" /k
reg query key_name /c /e