The Raspberry Pi Arch Linux image runs sshd by default. Assuming you have it plugged into your network with the ethernet jack, you can SSH into it by running (on a remote machine):
$ ssh firstname.lastname@example.org The authenticity of host '192.168.1.10 (192.168.1.10)' can't be established. RSA key fingerprint is aa:bb:cc:2d:f3:d7:11:6b:fd:cc:22:72:b2:ac:ee:dd. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.1.10' (RSA) to the list of known hosts. email@example.com's password: root [root@alarmpi ~]# cat /proc/cpuinfo Processor : ARMv6-compatible processor rev 7 (v6l) BogoMIPS : 697.95 Features : swp half thumb fastmult vfp edsp java tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xb76 CPU revision : 7 Hardware : BCM2708 Revision : 0002 Serial : 0000000000000001
That is, if you’re lucky enough that your router reports to you the IP address of the devices on your network. If you aren’t lucky (like me), you’ll need to attach a monitor to your pi, log in with the root:root credentials, and run ifconfig to figure out what the IP address is.
With my particular setup, the HDMI doesn’t seem to want to work properly, so I have to use the RCA jack for now. Luckily me I don’t plan on using a display with it so it’s not the end of the world.