این خطا رو میده
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Building dependency tree
Reading state information... Done
Package telnet-server is a virtual package provided by:
telnetd-ssl 0.17.24+0.1-23
telnetd 0.17-36
krb5-telnetd 1:1.0.1-4
inetutils-telnetd 2:1.9-2
heimdal-servers 1.6~git20120403+dfsg1-2
You should explicitly select one to install.
در ضمن لطفا هم پکیج لازم برای telnet server و هم telnet client رو معرفی کنید
با تشکر