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Connection to other computers

Type "telnet" and the computer name
(usually a number of the form xxx.xx.xx.xxx,
or something like "tralala.phy.tu-dresden.de"),
then start the usual login procedure.

However, telnet is not particularly safe ! Better use encripted connection ("secure shell", ssh) !
Type "ssh" and the computer name, then start the usual login procedure.
For other username, type "ssh -l username" + computer name.

Sometimes connection is not working,
target computer might be switched off ("down")
or connection is just not working (thanks to telecom).
For checks try :

"ping" : Type "ping" + computer name

ping tries to enter communication with target computer,
sending little data packages and checking their arrival.

Or try :
"traceroute" : Type "traceroute" + computer name

traceroute checks the full communication line with target computer,
sending little data packages and checking their through-put time.

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