Installing header on ES throwing error

Command i run
bin/plugin -url http://file/ --install head
ERROR: unknown command []. Use [-h] option to list available commands

Are you trying to install the head plugin from a specific URL?

yes i am trying to install from specific url for elastic search version2.3.1

I think your syntax is wrong -

Same command is working but getting this error N
NOTE: Unable to verify checksum for downloaded plugin (unable to find .sha1 or .md5 file to verify)
ERROR: Could not find plugin descriptor '' in plugin zip

You will need to ask the author of that plugin, sorry!

BTW site plugins won't be supported anymore in 5.0

Not able to get you, you mean to say it wont support url download ?

It won't support plugins like head.