On some editor's Linux based appliance(s), there is not telnet binary installed. To test TCP netwotk flows, it's possible to use python's socket module with a short script:

 1#!/usr/bin/python
 2
 3import socket
 4import sys
 5
 6if len(sys.argv) != 3:
 7    print("usage: telnet.py IPADDRESS PORT")
 8    exit(- …