Tripp Lite 93-2879 - Manual (Page 167)

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B096-016 B096-048 and B092-016 User Manual Page 167
route
openntpd
ping
portmap
pppd
routed
setserial
smtpclient
stty
stunel
tcpdump
tftp
tip
traceroute
More details on the above Linux commands can found online at:
http://en.tldp.org/HOWTO/HOWTO-INDEX/howtos.html
http://www.faqs.org/docs/Linux-HOWTO/Remote-Serial-Console-HOWTO.html
http://www.stokely.com/unix.serial.port.resources/serial.switch.html