≡ Menu

network interfaces

Linux Static IP Address Configuration

How do I configure the Internet Protocol version 4 (IPv4) properties of a network connection with a static IP address for servers running Linux operating systems? How do I configure static IP address under Debian Linux or Redhat / RHEL / Fedora / Redhat Enterprise Linux server?
[click to continue…]

Sysadmin because even developers need heroes!!!

Debian Linux Configure Wireless Networking With WPA2

I‘ve Atheros AR5001 wifi a/b/g card detected and supported natively under Linux. How do I configure my wireless card with WPA2 networking using /etc/network/interfaces file?
[click to continue…]

KVM Guest: Shared Physical Network Device With Host (bridging configuration)

The NAT based connectivity is useful for easy deployments. However I want to use full bridging, where the guest is connected directly to the LAN. How do setup and share physical network with host and rest of the LAN under Linux?
[click to continue…]

SUSE Linux Restart / Stop / Start Network Service

How do I start / stop or restart networking service under Suse Linux without rebooting the server?
[click to continue…]

Redhat Linux: Find Out My IP Address

How do I to find out ip address on a CentOS or Fedora or Redhat Enterprise Linux server or desktop system using bash shell or command line options?
[click to continue…]

Linux: Show / Display Available Network Interfaces

How do I display all available network interfaces names under Linux operating systems using bash shell prompt?
[click to continue…]

FreeBSD DHCP Set Hostname ( Empty Hostname After Reboot )

I’m using FreeBSD 7.2 on HP laptop and getting IP info via WI-FI router. I’ve setup hostname in /etc/rc.conf buy after the boot process, I check host name with “hostname” command, but get empty line. Setting hostname with “hostname” works well, but after reboot host name is still empty. I suspect it has something to do with DHCP settings. How do I set hostname-using DHCP?
[click to continue…]

Red Hat / CentOS: Swap / Change Ethernet Aliases

Q. My Ethernet aliases are randomly switched and they are bound to the wrong interface. My eth0 became eth1 and eth1 become eth0. This is causing all sort of trouble for services and firewall configurations. How do I swap back and make sure Ethernet aliases works correctly under CentOS Linux server?
[click to continue…]

Bind Postfix Mail Server To Localhost or Specific IP Address Only

Q. How do I bind Postfix MTA to specific IP address such as 127.0.0.1 or 202.5.1.2?
[click to continue…]

Ubuntu Linux Configure Gateway / Default Routing IP Address

Q. How do I configure default router or gateway IP address under Ubuntu Linux / Debian Linux? How do I change default router / gateway IP under Ubuntu Linux?
[click to continue…]