What operating system are you using? And what exactly is it you want to practise?
If it's linux you can telnet to yourself. Alternatively, you could try some Free Shell Accounts
Telnet is not used as much because of the security issues with it.
Goodbye, Mittens (1992-2008). My pillow will be cold without your purring beside my head
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Bukhari:V3B48N826 “The Prophet said, ‘Isn’t the witness of a woman equal to half of that of a man?’ The women said, ‘Yes.’ He said, ‘This is because of the deficiency of a woman’s mind.’”