Reindex using Command line in Magento2

Here Explain how to handle reindex using command line in magento2.

In root magento directory

php bin/magento indexer:reindex

in root/bin directory

php magento indexer:reindex

To get the index name to run index one by one first write below command to get info

in magento root directory

php bin/magento indexer:info

To run single reindexing command

php bin/magento indexer:reindex indexer_name

indexer name which we received name from indexer:info