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Sets the @ A record for your domain hosted by namecheap to your current internet-facing IP address, logs success or failure with syslog, and logs the data returned to /root/dnsupdate.
Change the XXX's as appropriate.
Sends log lines from murmur's (the mumble server's) logfile to syslog.
Executes the previously-run command constantly until it returns 0 (success). Put a