Technology Insights

How to SpeedTest LAN Traffic on Windows and Linux Clients and Servers

Testing your Local Area Network (LAN) speeds on a regular basis is a good idea to make sure you don’t have any major issues that have crept into the network. I would recommend a couple different free tools to use to accurately test every machine on your network. Below will be a brief explanation of each of the solutions followed with instructions and possible issues you might run into.

Windows clients and servers can be tested using Totusoft’s LAN Speed Test which could also be used to test Window’s clients that have network shares to Linux servers. The application is extremelly simple but will provide a nice basic overview of the speeds your LAN is capable of. The application writes a file to any network share, clears the file cache, and then reads the file back to make sure its not reading the file from cache instead of writing it over the network.

Technology Insights

How to Check CPU Speed on Linux

The easiest way to check CPU speed and CPU model on Linux is to issue the below command from the CLI.

bash

  1. more /proc/cpuinfo | egrep 'model name|cpu MHz'

This will return results like the below that will list CPU model name on one line followed by CPU speed on the next line.

bash

  1. [root@server ~]# less /proc/cpuinfo | egrep 'model name|cpu MHz'
  2. model name : Dual-Core AMD Opteron(tm) Processor 2212
  3. cpu MHz : 2010.302
  4. model name : Dual-Core AMD Opteron(tm) Processor 2212
  5. cpu MHz : 2010.302
  6. model name : Dual-Core AMD Opteron(tm) Processor 2212
  7. cpu MHz : 2010.302
  8. model name : Dual-Core AMD Opteron(tm) Processor 2212
  9. cpu MHz : 2010.302

Technology Insights

Install and Configure NTP on CentOS 5.X

This is just a brief howto about installing and configuring NTPD (Network Time Protocol Daemon) on a Linux server which in this case is specifically NTPD. First we will install ntpd, then update the current time on the server, configure ntpd to restart on server boot, and then start ntpd.

  1. Install NTPD: Run the below command to install ntpd via yum.
  2. bash

    1. [root@server ~]# yum install ntp

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How to Turn Off SELinux on a CentOS Server

Follow the below directions to turn off selinux on a CentOS server. SeLinux can cause many issues and if your server is behind a properly configured firewall as well as the systems administrator only opens necessary ports that are configured properly your risks should be minimal.

  1. Modify selinux Configuration:Modify the selinux config file by issuing the command below and changing the SELINUX option to disabled as shown below.
  2. bash

    1. [root@server ~]#vi /etc/selinux/config