How to list all network interfaces and their ip address in Linux

bahadur has asked for the wisdom of the Perl Monks concerning the following question:

hi i am making a CLI in Perl. one of the comman issued by users is show interfaces which will list all the interfaces on the machine with this additional information


ID   Name        Speed   Link    Status 
eth0 Ethernet E0 100Mb     Full    link ok     
eth1 Ethernet E1 100Mb     Full    link ok    
eth2 Ethernet E2 Unknown    Unknown        
eth3 Ethernet E3 Unknown    Unknown        
eth4 Ethernet E4 Unknown    Unknown        
eth5 Ethernet E5 Unknown    Unknown
[download]

what package do i need to do this?

Comment on How to list all network interfaces and their ip address in Linux Download Code

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Re: How to list all network interfaces and their ip address in Linux by Fletch (Bishop) on Jun 14, 2005 at 00:01 UTC
If you're satisfied to limit yourself to just Linux you should be able to get away rather simply with parsing the output from `ifconfig -a` and looking for just those interfaces matching `/^eth\d+/`. `open( IFCFG, "ifconfig -a \|" ) or die "Can't open pipe from ifconfig: +$!\n"; my %ifs; while( <IFCFG> ) { chomp; ## ... } close( IFCFG );` [download] -- We're looking for people in ATL	[reply] [d/l] [select]
Re: How to list all network interfaces and their ip address in Linux by kaif (Friar) on Jun 14, 2005 at 01:39 UTC
I think IO::Interface is what you want. Check out in particular the synopsis.	[reply]
Re: How to list all network interfaces and their ip address in Linux by monarch (Priest) on Jun 14, 2005 at 02:06 UTC
An additional approach is to use Net::SNMP and read in the `ifTable` MIB table for a device. This would only work for machines that have an snmp agent running on them (such as Cisco routers, or linux machines running something like `snmpd`).	[reply] [d/l] [select]