sudo ./magento setup:install --base-url= --db-host=localhost --db-name=magento2 --db-user=root --db-password=1234 --admin-firstname=admin --admin-lastname=admin [email protected] --admin-user=admin --admin-password=admin123 --language=en_US --currency=USD --timezone=America/Chicago --use-rewrites=1

After running above command it shows following error

SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client

[InvalidArgumentException] Parameter validation failed

  • did you use correct DB password at --db-password?
    – kunj
    Commented Aug 21, 2018 at 10:41
  • 1
    yes i can establish connection via mysql workbench as well as from terminal @kunj Commented Aug 21, 2018 at 10:48

2 Answers 2


Can you try this one?

sudo ./magento setup:install --base-url="" --db-user="root" --db-password="1234" --db-host="localhost" --db-name="magento2" --admin-firstname="admin" --admin-lastname="admin" --admin-email="[email protected]" --admin-user="admin" --admin-password="admin123" --backend-frontname="admin" --language="en_US" --currency="USD" --timezone="America/Chicago" --use-rewrites="1"

This is the one which works for me, hopefully it will work for you too.


You can use this command, I use this personally use this command :

sudo bin/magento setup:install --base-url=http://marketplcae.local --db-host=localhost --db-name=marketplace  --db-user=admin --db-password="admin123" --admin-lastname=zeshan --admin-firstname=shoukat [email protected] --admin-password=admin123  --admin-user=admin  --language=en_US --currency=GBP --timezone=Europe/London

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