Unix version using command

How to check Unix version using command prompt?

surya# cat /etc/*-release

SUSE Linux Enterprise Server 12 (x86_64)VERSION = 12

surya# cat /proc/version

Linux version 2.6.16.60-0.58.1.3835.0.PTF.638363-smp

How to find out LAN card speed in linux ?

To Find full or half duplex speed:

You can use dmesg command to find out your duplex mode:

# dmesg | grep -i duplex

O/P:

eth0: link up, 1000Mbps, full-duplex, lpa 0x45E1

So we can come to know that it has

1. One NIC card, i.e, etho. if it has 2 NIC cards , it will show eth1 2. It is 1000Mbps speed3. Communication is full duplex mode.

Use ethtool to display or change ethernet card settings. To display duplex speed.

# ethtool eth0

Output:

Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on

Explanation:

So we come to know that , eth0 supports 10baseT/Half, 10baseT/Full, 100baseT/Half,100baseT/Full and 1000baseT/Full.

But the network configured as 1000Mbps , Full duplex mode.

We can also use mii-tool to find out your duplex mode. Type following command at shellprompt:

# mii-tool

Output:

eth0: negotiated 100baseTx-FD flow-control, link ok

Remember:

100baseTx-FD: 100Mbps full duplex (FD)100baseTx-HD: 100Mbps half duplex (HD)10baseT-FD: 10Mbps full duplex (FD)10baseT-HD: 10Mbps half duplex (HD)

Auto-negotiation: on Supports Wake-on: umbg Wake-on: g Current message level: 0x00000007 (7) Link detected: yes