How to change the host name of Linux computer

On a Linux computer, you can change the host name anytime you like following the method given below after opening a terminal window.

$ sudo vi /etc/hosts <enter>

127.0.0.1 mycomputer.mydomain.com <enter> :wq

$ sudo vi /etc/hostname <enter> Insert mycomputer.mydomain.com <enter> :wq

$ sudo hostname -F /etc/hostname <enter>

Now check if hostname has changed $ . . . → Read More: How to change the host name of Linux computer

Unable to log into LuCi web interface after upgrading OpenWRT from barrier-breaker to chaos-calmer

I applied the Chaos Calmer OpenWRT firmware upgrade on the TP Link WDR4300 router. Very important to note that if you already use OpenWRT on the router, install the sysupgrade and not the factory binary firmware file. Use factory only when upgrading from the factory TP Link firmware.

For first time install use this file . . . → Read More: Unable to log into LuCi web interface after upgrading OpenWRT from barrier-breaker to chaos-calmer

How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

You have guests at your home and they want to use your wireless network to retrieve emails, etc off the Internet. This is not a unique situation, but is quite common everywhere, with the proliferation of devices and services that require Internet access. The only issue you face is that if you give them your . . . → Read More: How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

How to obtain WLAN traffic statistics using Gkrellm

How to obtain WLAN traffic statistics using Gkrellm

Gkrellm is a powerful system monitor utility on Linux systems. If you need to obtain CPU temperatures, disk I/O, network traffic incoming and outgoing statistics (daily, weekly or monthly), then this is the right choice.

To gather a sizeable amount of WLAN traffic count, you need to . . . → Read More: How to obtain WLAN traffic statistics using Gkrellm

How to watch the internet connections established by devices on OpenWRT router real-time with iftop

We all want to know to which internet connections our devices connect to. One of the best ways to do that, is use iftop.

Install the iftop package in OpenWRT on the router itself to enable it to be used to monitor these network connections.

To do so, open a terminal window on your computer . . . → Read More: How to watch the internet connections established by devices on OpenWRT router real-time with iftop

How to install OpenWRT on the TP-Link WDR-4300 router

Download the OpenWRT Breaking Barrier firmware for TP-Link WDR4300 router from http://wiki.openwrt.org/toh/tp-link/tl-wdr4300. You will also find the instructions on the upgrade process there.

Next, visit the web GUI interface of the TP-Link WDR-4300 router. In my case, this was at http://192.168.1.1 of the factory TP-Link firmware.

Select System Tools -> Firmware Upgrade, click on Browse… . . . → Read More: How to install OpenWRT on the TP-Link WDR-4300 router

How to revert to default TP-Link wireless router firmware from dd-wrt

Some of us like to try out multiple router firmware and at times, need to revert back to the default firmware that came with the router. TP-Link is fairly easy to revert, where you can experiment with various firmware before you settle down for the one you find most useful. The below steps enable you . . . → Read More: How to revert to default TP-Link wireless router firmware from dd-wrt

Downgrade dd-wrt firmware from dd-wrt version 24461 to dd-wrt version 24160

Recently, there have been no upgrades to the dd-wrt firmware I use on my routers. Found that the last dd-wrt firmware version 24461, did not permit upgrades to newer firmware due to a bug in it. It also did not allow downgrades to a lower version of dd-wrt via the Web GUI interface or any . . . → Read More: Downgrade dd-wrt firmware from dd-wrt version 24461 to dd-wrt version 24160

Create VLAN on TP-Link WDR4300 wireless router with isolation

The TP-Link WDR4300 wireless router has an Atheros Chip. Due to this, it is not easy to set up VLANs (Virtual Local Area Networks) on it. Below explains how this can be done with the kind of problem that was overcome.

Problem: I had a guest computer on my home wireless network that kept sending . . . → Read More: Create VLAN on TP-Link WDR4300 wireless router with isolation

Broadcom 4313 wireless does not connect to network or internet in Linux but detects wireless networks

Wireless adapter on Lenovo Z580 does not connect to Internet in Linux although it detects all the wireless networks. Finally, got the settings right to enable the use of built-in Broadcom 4313 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)

Here are the steps. Open a terminal window. In the . . . → Read More: Broadcom 4313 wireless does not connect to network or internet in Linux but detects wireless networks

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