[SSH] Resolving WARNING: UNPROTECTED PRIVATE KEY FILE!
by Riley MacDonald, August 25, 2018
When upgrading my development machine I backed up my ~/.ssh directory so I would still have access to all of my development tools and servers. Unfortunately when attempting an ssh connection I received the following error:
$ ssh [user@some_server_address] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: UNPROTECTED PRIVATE KEY FILE! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Permissions 0775 for '/home/user/.ssh/id_rsa' are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored. Load key "/home/user/.ssh/id_rsa": bad permissions [user@some_server_address]: Permission denied (publickey). |
Unfortunately my backup modified the file permissions which now violates the contract. This issue can be resolved by changing the file permissions back to 600:
~/.ssh $ sudo chmod 600 id_rsa ~/.ssh $ sudo chmod 600 id_rsa.pub |