Corrigé 4.2 Commandes de déplacement

[tux]$ vi /etc/services 

Cela donne :

# /etc/services:  
# $Id: services,v 1.49 2017/08/18 12:43:23 ovasik Exp $ 
# 
# Network services, Internet style 
# IANA services version: last updated 2016-07-08  
#  
# Note that it is presently the policy of IANA to assign a single well-known  
# port number for both TCP and UDP; hence, most entries here have two entries  
# even if the protocol doesn't support UDP operations.  
# Updated from RFC 1700, ``Assigned Numbers'' (October 1994).  Not all ports  
# are included, only the more common ones.  
#  
# The latest IANA port assignments can be gotten from  
#       http://www.iana.org/assignments/port-numbers  
# The Well Known Ports are those from 0 through 1023.  
# The Registered Ports are those from 1024 through 49151  
# The Dynamic and/or Private Ports are those from 49152 through 65535  
#  
# Each line describes one service, and is of the form:  
#  
# service-name  port/protocol  [aliases ...]   [# comment]  
  
tcpmux          1/tcp                           # TCP port service multiplexer  
tcpmux          1/udp                        ...