Linux Change Ip Address Permanently

On most Debian systems this is done when installing the system, and you are seldom likely to need to change it on a simple system. Under DHCP Server, change the Start IP address to the same IP address range of your router. Change MAC Address Using The Terminal/Network Manager Under Ubuntu 13. The steps in this tutorial have been tested on kubuntu 12. NETWORKING=yes HOSTNAME=my-hostname FORWARD_IPV4=true GATEWAY="XXX. 04 but the steps should work for any version of Ubuntu. Change into the. In this brief tutorial, we will see how to change MAC address in Linux. IPROUTE2 Utility Suite Howto Main PolicyRouting. gateway 192. View your current default gateway by typing "route," pressing "Enter," and noting the address next to the "default" setting. This will change the host name, but it will go back to whatever is in the /etc/hostname file after a restart. Change the name associated with the IP address 127. A FQDN consists of a short host name and the DNS domain name. Linux add a second IP address, permanent or temporary Written by Guillermo Garron Date: 2013-05-24 17:11:11 00:00 Add a secondary IP to Linux Add a second temporary IP address. , GNOME) as documented in the bug #719621. interface and start Duplicate Address Detection, if necessary. Sounds like you have another machine useing the ip address, try doing ifdown and then ping from another machine to your ip address if you get reply, change your static ip to one that gets no respose do a ping first to check if the ip is in use, this way you can ensure you have a unique address, if using a dhcp make sure you add a reservation into it else it could happen again where the server. On Fedora, to change the hostname permanently you need to edit the network configuration files. And your IP should be in the same range as the router is. Note: Make sure to open. The format of the address depends on the protocol. ip tunnel change ${interface name} ${options} Examples: ip tunnel change tun0 remote 203. 3 RHEL, Red Hat Enterprise Linux Server release 6. In this tutorial we will be spoofing the MAC address of our wireless adapter with a random MAC address generated by Macchanger on Kali Linux. See the warnings in section THE FQDN above, and avoid using this option; use hostname --all-fqdns instead. A default gateway is a remote host or router that your Linux host forwards traffic to when the destination IP address of outgoing traffic does not match any route in your local routing table. ifconfig stands for "interface configuration. 04 Trusty Tahr. How to Assign an IP Address on a Linux Computer. Changing the IP Address of an AD DC in a Multi-domain Environment. In order to change your ip address using ifconfig, and have it survive a reboot, you must do the following: ifconfig eth0 down; ifconfig eth0 192. Ifcfg-en0s5 10. My version of SCO was so fonky and old, though, that I didn't even have the option to use DHCP. ping uses the ICMP protocol’s mandatory ECHO_REQUEST datagram to elicit an ICMP ECHO_RESPONSE from a host or gateway. Enabling a private floating IP only requires you to add it as an alias to the private network interface, commonly eth1. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. In order to change your ip address using ifconfig, and have it survive a reboot, you must do the following: ifconfig eth0 down; ifconfig eth0 192. Make sure to enter the IP Addresses of your Linux computers. Enable IP address conflict detection in your DHCP server ^. Click the Add button, located beside the Addresses table. This document does not provide the procedure for that change. The current hostname can be checked by typing hostname command without any argument. This trick should work on all Debian-based Linux distros, including Ubuntu. Change DNS settings on Linux. Also u need to change the ip address in /etc/hosts file. Ubuntu – Change Hostname Permanently Using the Command Line Posted on April 24, 2013 by Mike Lane On Ubuntu the hostname is stored in both the /etc/hosts and /etc/hostname files. In many cases you need to change MAC to allow internet access or run any MAC based licensed software like Radius Manager. " A computer may also have a "local address," which is typically copied from the network card's hardware address. To change the IP address of an Active Directory (AD) domain controller (DC) in a multi-domain environment: Demote the DC. This article is excerpted from Chapter 28 of TCP/IP Unleashed by Karanjit Siyan (Sams Publishing: ISBN 0672323516). conf: iptables-multiport is the default action performed by Fail2Ban when an IP is to be banned (or jailed), as defined in the jail. Is your Craigslist IP blocked? Here are some simple ways you can access the website yet again. Now that we have what we need, we will move onto the setup. The default name was set when you were installing Ubuntu. In order to set a default route persistently in Linux, you can do the following. How to Find Your MAC Address. If you wish to change a default gateway temporarily at run time, you can use ip command. This will change the host name, but it will go back to whatever is in the /etc/hostname file after a restart. If you are a Linux system administrator, time will come when you will need to configure networking on your system. BUT, when i restart my computer, the IP address is vanished, then i have to give IP address again and again after rebooting. If you need to change it permanently, you can edit the hostname file I talked about earlier. Last updated on: 2018-12-21; Authored by: Jered Heeschen; If you find that your server's Domain Name Server (DNS) settings are misconfigured or you prefer to use your own, this article describes how to change your Linux® server's DNS settings. The device will respond to the DNS query with the configured ip-address when queried for any hostname other than its own. You can edit the global SSH configuration file (/etc/ssh/ssh_config) if you want to make the changes permanent for all users. Since this address is physically printed or "burned in" the card, it cannot be changed. I reffered many links to change IP address using C/C++. Static IP address configuration To assign a static IP address to your machine running RedHat, edit the file /etc/sysconfig/network with the following details. Configure a Static IP Address on Fedora 24-25 November 21, 2016. 80 with your remote IP Address. Set static IP & DNS address in Kali or Backtrack. How to assign IP to network interface command line in linux. You’ll also get a little primer on how basic network communication works. IP addresses help to expedite the installation of a printer when numerous printers are present on a network, making it a burdensome task to browse through a list of the printers on the network in order to. In many cases you need to change MAC to allow internet access or run any MAC based licensed software like Radius Manager. In my example I want to change the IP on eth0 from 172. Next, simply type cmd press okay. Swap out the Gateway value with your actual gateway address. You can place your IP address information in these files, which are then used to auto-configure your NICs when Linux boots. 117 To change MAC address, you can use below command in commandline:. The MAC address can be temporary changed with ifconfig, iproute2 or the macchanger tool, in Debian, Ubuntu, Linux Mint or other Debian based distros. This tutorial will show you how to change MAC Address in CentOS 7. To get started, launch the Terminal application in Mac OS and then use the following command syntax:. To disable DHCP, please remove it(ip=dhcp) in uboot command line;To use a static IP, you can use ifconfig command such as: ifconfig eth0 10. You would have to run this ifconfig again after every bootup. MAC, that stands for Media Access Control, is a six byte ID permanently embedded in the firmware of a network adapter. For details, see Demoting a Samba AD DC. The server provides a lease on the IP address to the client. Remember you can always revert back to DHCP by reversing the steps. This tutorial will show how to change your Mac hostname with the command line and make the setting change permanent (well, permanent until you change it again): How to Change Host Name on Mac from the Command Line. You can edit the global SSH configuration file (/etc/ssh/ssh_config) if you want to make the changes permanent for all users. The following instructions are written for Linux and macOS. com and it will be changed to secondary. In this article I will show you the step wise procedure on how to create and run Linux based Virtual Machine and host MQTT broker on the same. How to Change the IPv4 Address and Other Network Configuration Parameters. Disable Network Manager. 3 and above here. 04 server you need to modify a relevant netplan network configuration file within /etc/netplan/ directory. Routers do not send broadcasts looking for the remote networks; therefore if a network is not listed in a routers table, the router simply discards the packets. Where HOST_NAME occurs, replace it with your desired hostname. The method for making such a change permanent is dependent on the system. A FQDN consists of a short host name and the DNS domain name. ping uses the ICMP protocol’s mandatory ECHO_REQUEST datagram to elicit an ICMP ECHO_RESPONSE from a host or gateway. Ubuntu Networking Configuration Using Command Line Setting up Second IP address or Virtual IP address in Ubuntu So where do I go to permanently add the infor. This might sound a little strange, but I try to achieve to set up an ip address permanently in Ubuntu using the command line, but not an editor. A humble request Our website is made possible by displaying online advertisements to our visitors. 3 RHEL, Red Hat Enterprise Linux Server release 6. Permanently change IP address on. 77 dev eth0. By default the Raspberry Pi uses DHCP to configure its network interfaces, including, on the model B, the built-in ethernet port. In order to permanently change an IP address on a SCO OpenServer Release 5, I used SCO’s menu driven tcp configuration tool, netconfig. Set the HWaddr of eth0 to a different address to avoid conflicts. Enabling a private floating IP only requires you to add it as an alias to the private network interface, commonly eth1. d/networking restart. Next, simply type cmd press okay. To get started, type ifconfig at the terminal prompt, and then hit Enter. DHCP or Dynamic is an IP address that will automatically be chosen for you from a pool of IP addresses that are assigned in the DHCP scope available on your network. You may want to forward ports from your router to serve web pages, use SSH from outside your local network or set up some sort of media server. IPROUTE2 Utility Suite Howto Main PolicyRouting. Leave a Reply. In order to permanently change an IP address on a SCO OpenServer Release 5, I used SCO's menu driven tcp configuration tool, netconfig. When the network setting panel opens, on the Wired connection, click the settings options button. This dynamic IP address assignment will need to be changed to a static IP address. Many peoples don't care about this, and don't change the hostname even if for example this was set to something really stupid by the datacenter that installed the system (most likely they will set this to "debian" on any debian installation, etc). Permanently change IP address on. 100, and you desire to change it to 192. Hi Experts, I have a linux server with a static ip address of 10. I'm going to show you just that, such that you can configure a static IP address in Ubuntu Server 18. Remember, the exams are hands-on, so it doesn't matter which method you use to achieve the result, so long as the end product is correct. hostname The command should return the new hostname. If the primary network interface has multiple IP configurations and you change the private IP address of the primary IP configuration, you must manually reassign the primary and secondary IP addresses to the network interface within Windows (not required for Linux). Listing Network Interfaces. To change the hostname type the command: $ hostnamectl set-hostname grace. How To Use Firewalld Rich Rules And Zones For Filtering And NAT Posted by Jarrod on April 6, 2016 Leave a comment (14) Go to comments Here we cover the RHCE exam objective “Use firewalld and associated mechanisms such as rich rules, zones and custom rules, to implement packet filtering and configure network address translation (NAT)” in Red. When you do, you will be able tp +add an address/netmask/gateway. By default the Raspberry Pi uses DHCP to configure its network interfaces, including, on the model B, the built-in ethernet port. > cPanel & WHM® (for Linux® Servers) > General Discussion > SOLVED IP Address Change/Can't access website Discussion in ' General Discussion ' started by SethHD97 , Jun 20, 2017. To do this in Unbuntu: sudo apt-get install nfs-common. To change the IP address permanently in Red Hat Linux, login as the root, and type the command system-config-network-tui &. This script will do the same stuff like the one above but it will ask you with a shell dialog which files you want modify before editing them. I have an Ubuntu 14 and have to change the MAC address but with: Is there an easy way to change it permanently by console? Reactions: And welcome to linux. This is a quick tutorial on how to set a static IP address using the terminal within Fedora 22. Macchanger is a tool that is included with any version of Kali Linux including the 2016 rolling edition and can change the MAC address to any desired address until the next reboot. To add an additional IP address, you need an Ethernet alias. You may have to register before you can post: click the register link above to proceed. Assuming wlp2s0 is your wifi, I think you may want to see the "Cloned MAC Address" feature inside NetworkManager to change the advertised MAC address of your wifi device - same for your Ethernet - Thomas Ward ♦ May 22 '17 at 11:20. com), you can set the system hostname so your instance identifies itself as a part of that domain. In kali and backtrack it is pre-installed on other distribution you can install it manually (type macchanger in the terminal to know how to install) by reading this tutorial you can spoof Mac address of any interface like eth0, wlan0 etc. In this brief tutorial, we will see how to change MAC address in Linux. 254 ctrl x /etc/init. Linux ifconfig command stands for interface configuration, it is used in the debugging and configuration of the network interfaces parameters. How to Change Hostname on CentOS 6. This option to ip neigh does not change the neighbour state if it was valid and the address is not changed by this command. The ifconfig command can be used to display and set ip address to network interfaces in linux. The current configuration of this adapter can be changed by using following command and this command will assign new ip address for your computer interface. Configuring Macvlan and Ipvlan Linux Networking. You will need to change the IP addresses to match your network. 04, mythbuntu 12. The program used the next availible IP address from my DNS server. Change IP Address: Change IP address of your Amahi server, Network Gateway, and DHCP Server Range. Finally, restart the network service using the following command to have these changes take effect. Easily Change Your Android SELinux Mode To Permissive. MAC, that stands for Media Access Control, is a six byte ID permanently embedded in the firmware of a network adapter. How to Set the Static IP Address Using CLI in Fedora/CentOS Linux tagged Command line, Fedora, Howto, Linux, Network, Server config, shell, Software, Tutorial. The ifconfig command can be used to display and set ip address to network interfaces in linux. Amazon Elastic Compute Cloud(EC2) is the Amazon Web. 1 netmask 255. I understand how to change the ip address permanently however, I need to also make a permanent change to the subnet mask. Select it and choose ‘associate address‘ from action menu. Leave a Reply. If you’ve changed the default action, then you’ll have to modify the corresponding action file accordingly. First stop and disable the gnome network manager from running on boot. This tutorial will show you how to change MAC Address in CentOS 7. Changing MAC address or we also can call it MAC address spoofing will be useful in some cases, but we will talk about it later in conclusion at the end of this article. etc) tasks that can’t be done in Windows platform easily. Read Also: How to Set Static IP Address and Configure Network in Linux. This information is sourced in part from Sun InfoDoc 21252, "How to Change the hostname and/or IP Address Without Running the sys-unconfig Command". ip tunnel change ${interface name} ${options} Examples: ip tunnel change tun0 remote 203. I'm at the following prompt, please note I have no experience with Linux, I. Step 1 Enabling IP forwarding. com hostname ~ ~ ~ ~ -- INSERT -- 2,43-57 ALL Run the. 77 dev eth0. Under Linux, change the MAC address with ‘ifconfighw,’ or use the GNU MAC Changer (try finding it in your distribution’s repository). Right-click the Start icon. Static: is the traditional hostname, which can be chosen by the user, and is stored in the /etc/hostname file. Start studying NET260. yaml or 50-cloud-init. This changes the name of the machine permanently and takes effect on a reboot. 0 Obtaining & Compiling IPROUTE2 9. 1 (WAN IP address) Note– Change the interface name according to Linux distro being used. Now that we have what we need, we will move onto the setup. The network interface lo interface is the special interface where we called it as localhost and special IP assigned. Amazon EC2 instance hostnames are derived from the IP address that is dynamically assigned to the instance at startup. This procedure explains how to modify the IPv4 address, host name, and other network parameters on a previously installed system. Now change the runtime value: # sysctl -w net. 04, and should work with many other GNU/Linux distributions. none this is a pseudo state used when initially creating a neighbour entry or after trying to remove it before it becomes free to do so. Though we will be using Ubuntu 16. To switch to static IP address, make the change to look like the one below: Step 2: Update Primary Network Interface to Static. While my example would all use the same subnet mask, in the real world, this may not be the case. I assure you this is a perfectly working and tested method. 04 but the steps should work for any version of Ubuntu. Note that "static" here means either a live IP address and or a statically assigned IP address on your LAN, such as 192. 100, and you desire to change it to 192. Another way to change the host name is to open a Terminal window and type in the following command: sudo hostname new-name. Linux ifconfig command stands for interface configuration, it is used in the debugging and configuration of the network interfaces parameters. To change the ip-address along with the hostname, follow the steps. Change IP address under RedHat / CentOS / Fedora core Linux => Please read - Howto change and setup IP address in Redhat Linux. What is a proper way to assign a static IP address to a network interface permanently on CentOS or RHEL 7? If you want to set up a static IP address on a network interface in CentOS 7, there are several different ways to do it, varying depending on whether or not you want to use Network Manager for that. How to configure Kali Linux to use a static IP address What are advantages of a static IP address usage? On a local network, a static IP address allows you to use the Web server, SSH, FTP and other network services without having to get to know IP of a system on which these services are running each time. HOSTNAME=myserver. How would I accomplish this. To change IP address in Windows 10, we have come up with a visual guide with really simple and easy steps. On ALL Linux system is recommended to change domainname and hostname in /etc/hosts and /etc/resolv. Top posting makes following the logic of the thread REALLY hard. Read Also: How to Set Static IP Address and Configure Network in Linux. To change the hostname type the command: $ hostnamectl set-hostname grace. Think Static as permanent and DHCP as temporary. com and it will be changed to secondary. Type in the default password: odroid. where ip-address is the address of a DNS server. I assume that there are two interfaces: eth0 & eth1, and that you wish to use eth0 as the default route. This was the simple version of the command. You should be good to go. The SliTaz web site is available in several languages and maintained by the internationalization team (i18n). If they do not, then their IP address will change back to the old address the next time the system is rebooted. yaml or 50-cloud-init. d/networking restart. Use the procedure for modifying the IP address of a server or networked standalone system. DEVICE=eth0 ONBOOT=yes BOOTPROTO=none NETWORK=192. Examples of services are a web page server, a MythTV backend server, and a calendar and address server. #ifconfig eth0 192. How to Change Your Linux Hostname Without Rebooting Lowell Heddings @lowellheddings September 1, 2010, 6:00am EDT If you've worked in the admin world for any length of time, you've probably run into an instance where you needed to change the hostnames on your server to match some corporate naming standard, but you can't have downtime either. conf, assign static ip through command line, how to set a static ip with ifconfig in linux, ifconfig alias, ifconfig set static default gateway, ifconfig set static ip ubuntu, linux static ip address configuration, route add, route delete, set a static ip with ifconfig. Downloading and installing RPMs isn't hard. To do this, a consecutive number is simply appended to the interface name, starting with 0 for the first alias. d/networking restart. Main purpose of Fail2ban is to prevent brute force login attacks. IPROUTE2 Utility Suite Howto Main PolicyRouting. How to Configure a Static IP Address in Ubuntu 18. This is post for those who are new to Red Hat Linux or Oracle Enterprise Linux (OEL) and wish to change hostname. Changing the IP address on a Linux system involves both changing the IP address using the ifconfig command and modifying the files that will make your change permanent. I changed the IP address of a V6. An NIS domain name can be added permanently by changing the line of text as follows: 127. Configuring Host Names Using hostnamectl - Red Hat Customer Portal. Enter the following into your terminal window or application. 7I want know about a code or a program, that can cange the ip address randomly with all the possible combinations in windows that of IPv4 and IPv6 Such as op: enter a choice: 1. Changing the IP address on a Linux system involves both changing the IP address using the ifconfig command and modifying the files that will make your change permanent. Since this address is physically printed or "burned in" the card, it cannot be changed. xenbr0 will still need to be set up to acquire an IP address just as Linux bridging does; see above for examples on how to set this up for the various distributions. You should be good to go. When the network setting panel opens, on the Wired connection, click the settings options button. localdomain 123. Mounting the Share in Linux. conf configuration file. Here's how to get networking all. ECHO_REQUEST datagrams (“pings”) have an IP and ICMP header, followed by a struct timeval and then an arbitrary number of “pad” bytes used to fill out the packet. For this purpose, we'll use Macchanger, an utility for manipulating MAC addresses, for which we'll create a systemd unit to start it automatically on boot. How to configure IP address on Oracle Linux Adding IP address in Oracle Linux can be done by editing the network-scripts. To get started, type ifconfig at the terminal prompt, and then hit Enter. Searching this forum I found out that I have to edit it into the file bootlocal. The first -s will provide a more verbose output. com Open the file at /etc/hosts. The following steps will show configuration of static IP address in CentOS machine. Static routes in Linux will be added usually through “route add” or “ip route” command. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. I just can't imagine there is nothing out there that writes. Configure a Static IP Address on Fedora 24-25 November 21, 2016. Now that we have what we need, we will move onto the setup. Turn off your router and Comcast modem. 2 – Setup static IP, subnet mask, broadcast address in Linux. (To assure that the guest's IP address remains unchanged, you can either configure the guest OS with static ip information, or add a element inside the element of the network that is used by your guest. It provides SSH connectivity for command line access, as well as keypair management for compatible programs like WinSCP. Computers use IP addresses to locate and talk to each other on the Internet, much the same way people use phone numbers to locate and talk to one another on the telephone. To change IP address in Windows 10, we have come up with a visual guide with really simple and easy steps. If your Amazon EC2 -Virtual Private Cloud (VPC) or Amazon EC2 -Classic instance has an Elastic IP and that instance is ever stopped or terminated, you can immediately associate a new EC2 instance with the Elastic IP. To disable DHCP, please remove it(ip=dhcp) in uboot command line;To use a static IP, you can use ifconfig command such as: ifconfig eth0 10. Setting a Static IP address with Raspbian Jessie Lite on the Raspberry Pi March 10, 2016 In the midst of my work upgrading the Raspberry Pi Dramble to Raspbian Jessie Lite, I noticed one of the basic components of the architecture—static IP addresses for all the Raspberry Pis—was not working correctly anymore. If you wish to change a default gateway temporarily at run time, you can use ip command. However, you can change or spoof the MAC address in the operating system itself using a few simple tricks. This app's icon resembles a black box; clicking it will open your computer's Command Prompt app. On ALL Linux system is recommended to change domainname and hostname in /etc/hosts and /etc/resolv. localdomain 123. SliTaz GNU/Linux English Website. This might sound a little strange, but I try to achieve to set up an ip address permanently in Ubuntu using the command line, but not an editor. You can use any one of the following methods to change the hostname and/or ip-address on RedHat related distributions. To change to a static IP address, make the highlighted changes below # This file describes the network interfaces available on your system # and how to activate them. In general, editing /etc/resolv. Qt: Setting the IP. A static IP address however will not change, it assigns your Raspberry Pi a permanent address on your network - so you know exactly where it is at all times. The ifconfig command can be used to display and set ip address to network interfaces in linux. d/networking restart. xxx(enter your alt dns server ip) Be sure to save your changes. xenbr0 will still need to be set up to acquire an IP address just as Linux bridging does; see above for examples on how to set this up for the various distributions. Using ifconfig. Cautions : Do not change hostname on live production systems!. Click Command Prompt. This will cause the network service to update /etc/resolv. Set static IP address Debian 9 nano /etc/network/interfaces address 192. Listing a record multiple times with the same IP address will not change the load sharing. Though we will be using Ubuntu 16. Use the procedure for modifying the IP address of a server or networked standalone system. Type in the default password: odroid. This is where things get kind of messy. IP address configuration in Kali Linux , there are two methods (static. Rejoin the DC to the domain. 0 through 10. Configure Static IP Address in CentOS. This script will do the same stuff like the one above but it will ask you with a shell dialog which files you want modify before editing them. How to Configure a Static IP Address in Ubuntu 18. Since this address is physically printed or "burned in" the card, it cannot be changed. 10 Network Wednesday, May 15, 2013 In this tip, we will see two ways for changing the MAC address either using a few terminal commands or simply from the network manager under Ubuntu 13. But, we can add these commands to the /opt/bootlocal. If for some reason the 12 hour mark was not renewed, then in 6 hours it would try again, then at 3,. If you want to change only the hostname you can either do it from command line, or from GUI as explained below. xxx” is the IP address you discovered in the previous step. we don't want the address to change in their browser. Then change the hardware. 10 or older. For this to work fully, your switch needs to support IEEE 802. Wait for 20 seconds (or upto 2 minutes). Is your Craigslist IP blocked? Here are some simple ways you can access the website yet again. (Editor's note: For more information, please see. The ip address command displays addresses and their properties, adds new addresses and deletes old ones. The hostname of a system can be used to make it easier to identify the host and not rely on an IP address which is difficult to remember. Unlike CentOS/RHEL 6, manually appending HOSTNAME=xxxxx in the file /etc/sysconfig/network and restarting system will not work on CentOS/RHEL 7, in order to change/set the hostname. Re: Working with MAC addresses Posted by Anonymous (59. Changing your home network IP address. This is typically the router and will send all packets to that IP address. The device will respond to the DNS query with the configured ip-address when queried for any hostname other than its own. This program will set the ip address of linux system using c programming language, how to set ip address in linux using c program. See the warnings in section THE FQDN above, and avoid using this option; use hostname --all-fqdns instead. Note2: Don't use the ifconfig command any more. Click on it and you can specify your own value with any random 12 characters of letters and numbers. Change IP Address: Change IP address of your Amahi server, Network Gateway, and DHCP Server Range. How to Change the IPv4 Address and Other Network Configuration Parameters. x and Fedora linux host normally configured with static ip address , so that easier to maintain the configuration on it. Org Website PolicyRouting Book 9. But how can i change it permanently ?? plz help. A humble request Our website is made possible by displaying online advertisements to our visitors. the above, I didn't really mean to say that I want "permanently to change the MAC address of my gateway NIC"; that controversy has gone on for far too long in other arenas. Howto change hostname on Redhat 6. 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