With SSH enabled, secure access is provided to the Mac. Systemsetup -setremotelogin on Creating an SSH access group Once completed, the SSH service will be enabled for all users on that authenticate on that Mac. To enable SSH, enter the command below into Terminal.app, and press Enter to execute it. On the plus side, there is a command that can be executed to turn on the SSH service, and another couple of commands can optionally configure the service and secure it so that only those requiring secure access will be authorized to do so. Turning the service on involves very little manual intervention, but when you multiply that by the number of Macs to administer, the task becomes incredulously time-intensive. Unfortunately (for Mac sysadmins), Remote Login–as Apple refers to it–comes turned off, by default (fortunate for security admins). One of these perks comes natively to OS X by way of SSH–the remote access network protocol that encrypts communication from end-to-end between server and client machine. In the never-ending search to work smarter, not harder, few things can be simpler than entering commands on one Mac and having them pushed out across the entire LAN to multiple nodes. Jesus Vigo goes over the steps to enabling SSH remotely within OS X from the Terminal.
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