How to add multiple nodes to chef

[ramanjk]

Hello all,
I am new to chef..i have learned basics of chef and i have configured basic set up with 3 nodes.

1. chef server
2. chef workstation
3. chef client node1
   i have added chef client node1 by using knife bootstrap command..and everything worked fine...

Now i decided to add one more node to chef by using the sameway that knife bootstrap...but this time i got an below error.

     can anybody help me that how to add nodes..

[root@chef recipes]# knife bootstrap x.x.x.x -x root -P xxxxxx
Doing old-style registration with the validation key at /root/chef-repo/.chef/ram-validator.pem...
Delete your validation key in order to use your user credentials instead

Connecting to 10.0.0.23
10.0.0.23 -----> Existing Chef installation detected
10.0.0.23 Starting the first Chef Client run...
10.0.0.23 Starting Chef Client, version 14.6.47
10.0.0.23
10.0.0.23 ================================================================================
10.0.0.23 Chef encountered an error attempting to load the node data for "chef.node2.com"
10.0.0.23 ================================================================================
10.0.0.23
10.0.0.23 Authentication Error:
10.0.0.23 ---------------------
10.0.0.23 Failed to authenticate to the chef server (http 401).
10.0.0.23
10.0.0.23 Server Response:
10.0.0.23 ----------------
10.0.0.23 Failed to authenticate as 'chef.node2.com'. Ensure that your node_name and client key are correct.
10.0.0.23
10.0.0.23 Relevant Config Settings:
10.0.0.23 -------------------------
10.0.0.23 chef_server_url "https://chef.server.com/organizations/ram"
10.0.0.23 node_name "chef.node2.com"
10.0.0.23 client_key "/etc/chef/client.pem"
10.0.0.23
10.0.0.23 If these settings are correct, your client_key may be invalid, or
10.0.0.23 you may have a chef user with the same client name as this node.
10.0.0.23
10.0.0.23 System Info:
10.0.0.23 ------------
10.0.0.23 chef_version=14.6.47
10.0.0.23 ruby=ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
10.0.0.23 program_name=/usr/bin/chef-client
10.0.0.23 executable=/opt/chef/bin/chef-client
10.0.0.23
10.0.0.23
10.0.0.23 Running handlers:
10.0.0.23 [2018-10-30T15:54:06+05:30] ERROR: Running exception handlers
10.0.0.23 Running handlers complete
10.0.0.23 [2018-10-30T15:54:06+05:30] ERROR: Exception handlers complete
10.0.0.23 Chef Client failed. 0 resources updated in 02 seconds
10.0.0.23 [2018-10-30T15:54:06+05:30] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
10.0.0.23 [2018-10-30T15:54:06+05:30] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
10.0.0.23 [2018-10-30T15:54:06+05:30] FATAL: Net::HTTPServerException: 401 "Unauthorized"