Answer / sanjiv vinaik

Ping mean its check system is on network and telnet check
access of application.

If you can Ping but can't telnet it means a specific port
which that application use to communicate is blocked. Check
your firewall rule to fix it.

Answer / jsdkar

if service not enable the server uncomment tcp,ssh service
in /etc/inetd.conf

Answer / ramanji

check tcp wrapper file

Answer / surender singh malik

Pinging a server just checks that Particular system is
present on the network.

Telnet or SSH are application to login the server from
remote and use the services provided by the server.

In TELNET DATA is not encrypted so it's easy to hack.
In SSH DATA is encrypted so it's safe.

Answer / madhukar

1. check tcp wrapper file, or
2. console may be uncomment, or
3. there is a file /etc/nologin

Answer / ashutosh

Server is in single user mode.

Answer / umamaheswara rao.g

you have to check the entry, DEV = CONSOLEin
in /etc/default/login file whether it is commented or not.
It should be un commented.

Answer / palak

Server can be on OK prompt

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