SSH Key: “Permissions 0644 for 'id_rsa.pub' are too open.” on mac

Question

I generate a ssh key pair on my mac and add the public key to my ubuntu server(in fact, it is a virtual machine on my mac),but when I try to login the ubuntu server,it says:

Answer 1

If youre using a .ssh/config file try to

chmod 0400 .ssh/config

then:

chmod 0400 .ssh/<<KEYFILE_PATH>>

Answer 2

Key should be readable by the logged in user.

Try this:

chmod 400 ~/.ssh/Key file
chmod 400 ~/.ssh/vm_id_rsa.pub

Answer 3

Lot's of similar answers but no explanations...

The error is thrown because the private key file permissions are too open. It is a security risk.

Change the permissions on the private key file to be minimal (read only by owner)

1. Change owner chown <unix-name> <private-key-file>
2. Set minimal permissions (read only to file owner) chmod 400 <private-key-file>

Answer 4

I removed the .pub file, and it worked.

Answer 5

chmod 400 path/to/filename

This work for me. When I did this file I am able to connect to my EC2 instance