Network operation mode Introduction 11.. PPuurrppoossee The network operation mode is selected either at boot time using askrunlevel (called automaticly) or anytime, using the "netconf --runlevel" command. Basically, _L_i_n_u_x can operate in three different ways, network wise. +o Stand-alone (local) mode. This mode is selected when no network adaptor is installed. It might be selected to save some rams. This mode configure the loopback interface allowing you to do minimal "local" networking (which is a good way to practice without bugging system administrators). +o Client mode. In this mode, only the minimal daemons necessary to access the network are started. While minimal, the inetd daemon is activated, allowing your computer to provide some services such as telnet. +o Server mode. All daemons configured will be started. 22.. SSwwiittcchhiinngg nneettwwoorrkk lleevveell oonn tthhee ffllyy Your are allowed to switch the network operation mode on the fly using the following commands: +o netconf --runlevel local +o netconf --runlevel client +o netconf --runlevel server In each case, it will make sure the proper daemons are running. The command netconf --update may be also useful to make sure a system is current (in sync with its configuration). The command netconf --status gives a report of what have to be done, while --update does it. The file /var/run/netconf.level stores the current operation mode and is used by the --update and --status netconf's option. This file is updated by "netconf --runlevel" and by /sbin/askrunlevel at boot time.