Untuk mengecek interface kartu jaringan / Network Interface Card pada Linux Slackware dimulai dengan perintah sebagai berikut :

# ifconfig  -a

output : Menunjukkan bahwa interface kartu jaringan adalah eth0 dan IP Address 10.10.23.2

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.10.23.2  netmask 255.255.255.0  broadcast 10.10.23.255
        inet6 fe80::6af7:28ff:fe61:fe22  prefixlen 64  scopeid 0x20<link>
        ether 68:f7:28:61:fe:22  txqueuelen 1000  (Ethernet)
        RX packets 398423  bytes 571131994 (544.6 MiB)
        RX errors 0  dropped 5  overruns 0  frame 0
        TX packets 384364  bytes 41867072 (39.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Untuk meng-input IP Address static kita perlu mengedit file konfigurasi yang teletak dii /etc/rc.d/rc.inet1.conf.

# nano /etc/rc.d/rc.inet1.conf

output

# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# You can configure network interfaces other than eth0,eth1... by setting
# IFNAME[interface] to the interface's name. If IFNAME[interface] is unset
# or empty, it is assumed you're configuring eth<interface>.

# Several other parameters are available, the end of this file contains a
# comprehensive set of examples.

# =============================================================================

# Config information for eth0:
IPADDR[0]=""
NETMASK[0]=""
USE_DHCP[0]=""
DHCP_HOSTNAME[0]=""

# Config information for eth1:
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]=""
DHCP_HOSTNAME[1]=""

# Config information for eth2:
IPADDR[2]=""
NETMASK[2]=""
USE_DHCP[2]=""
DHCP_HOSTNAME[2]=""

# Config information for eth3:
IPADDR[3]=""
NETMASK[3]=""
USE_DHCP[3]=""
DHCP_HOSTNAME[3]=""

# Default gateway IP address:
GATEWAY=""

# Change this to "yes" for debugging output to stdout.  Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

# Example of how to configure a bridge:
# Note the added "BRNICS" variable which contains a space-separated list
# of the physical network interfaces you want to add to the bridge.
#IFNAME[0]="br0"
#BRNICS[0]="eth0"
#IPADDR[0]="192.168.0.1"
#NETMASK[0]="255.255.255.0"
#USE_DHCP[0]=""
#DHCP_HOSTNAME[0]=""

## Example config information for wlan0.  Uncomment the lines you need and fill
## in your data.  (You may not need all of these for your wireless network)
#IFNAME[4]="wlan0"
#IPADDR[4]=""
#NETMASK[4]=""
#USE_DHCP[4]="yes"
#DHCP_HOSTNAME[4]="icculus-wireless"
#DHCP_KEEPRESOLV[4]="yes"
#DHCP_KEEPNTP[4]="yes"
#DHCP_KEEPGW[4]="yes"
#DHCP_IPADDR[4]=""
#WLAN_ESSID[4]=DARKSTAR
#WLAN_MODE[4]=Managed
#WLAN_RATE[4]="54M auto"
#WLAN_CHANNEL[4]="auto"
#WLAN_KEY[4]="D5A31F54ACF0487C2D0B1C10D2"
#WLAN_IWPRIV[4]="set AuthMode=WPAPSK | set EncrypType=TKIP | set WPAPSK=96389dc66eaf7e6efd5b5523ae43c7925ff4df2f8b7099495192d44a774fda16"
#WLAN_WPA[4]="wpa_supplicant"
#WLAN_WPADRIVER[4]="wext"
#WLAN_WPAWAIT[4]=30

## Some examples of additional network parameters that you can use.
## Config information for wlan0:
#IFNAME[4]="wlan0"              # Use a different interface name instead of
                                # the default 'eth4'
#IFNAME[4]="eth0:1"             # Set up an IP alias.
#HWADDR[4]="00:01:23:45:67:89"  # Overrule the card's hardware MAC address
#MTU[4]=""                      # The default MTU is 1500, but you might need
                                # 1360 when you use NAT'ed IPSec traffic.
#DHCP_TIMEOUT[4]=15             # The default timeout for the DHCP client to
                                # wait for server resonse is 10 seconds, but
                                # you might want a shorter or longer wait.
#DHCP_KEEPRESOLV[4]="yes"       # If you don't want /etc/resolv.conf overwritten
#DHCP_KEEPNTP[4]="yes"          # If you don't want ntp.conf overwritten
#DHCP_KEEPGW[4]="yes"           # If you don't want the DHCP server to change
                                # your default gateway
#DHCP_IPADDR[4]=""              # Request a specific IP address from the DHCP
                                # server
#DHCP_DEBUG[4]="yes"            # Make dhcpcd show verbose diagnostics
#DHCP_NOIPV4LL[4]="yes"         # Do not assign an ipv4ll address when a DHCP
                                # server is not found (ipv4ll link-local
                                # adresses in the IP range 169.254.0.0/16 are
                                # also known as "zeroconf" addresses)
#WLAN_ESSID[4]=DARKSTAR         # An example of how you can override _any_
                                # parameter defined in rc.wireless.conf, by
                                # prepending 'WLAN_' to the parameter's name.
                                # Useful with multiple wireless interfaces.
#WLAN_IWPRIV[4]="set AuthMode=WPAPSK | set EncrypType=TKIP | set WPAPSK=thekey"
                                # Some drivers require a private ioctl to be
                                # set through the iwpriv command. If more than
                                # one is required, you can place them in the
                                # IWPRIV parameter (separated with the pipe (|)
                                # character, see the example).
#WLAN_WPA[4]="wpa_supplicant"   # Run wpa_supplicant for WPA support
#WLAN_WPADRIVER[4]="ndiswrapper"# Tell wpa_supplicant to specifically use the
                                # ndiswrapper driver (if you leave this empty
                                # the 'wext' driver is used by default)
#WLAN_WPAWAIT[4]=30             # In case it takes long for the WPA association
                                # to finish, you can increase the wait time
                                # (defaults to 10 seconds)

Pada bagian eth0 kita bisa memasukkan IP Address dan Gateway diantara tanda petik.

IPADDR[0]="192.168.1.2" 
NETMASK[0]="255.255.255.0" 
USE_DHCP[0]="" 
DHCP_HOSTNAME[0]=""

# Default gateway IP address: 
GATEWAY="192.168.1.1"

Setelah kita input , kemudian restart-lah service jaringan dengan perintah :

/etc/rc.d/rc.inet1 restart

Untuk seting DNC silahkan edit file /etc/resolv.conf

nameserver 8.8.8.8