Category Archives: System Stuff

Troubleshooting with the multipathd Interactive Console

Posted on May 17, 2011 by jlim0930

The multipathd -k command is an interactive interface to the multipathd daemon. Entering this command brings up an interactive multipath console. After entering this command, you can enter help to get a list of available commands, you can enter a interactive command, … Continue reading →

Posted in System Stuff | Tagged , , | Leave a comment

Prevent yum from updating RHEL to a new release

Posted on April 7, 2011 by jlim0930

Sometimes you will run into a scenario where you need to keep an OS at certain version due to vendor support. Such as EMC/IBM SAN powerpath etc.. You might also want to remain at a certain version due to change … Continue reading →

Posted in System Stuff | Tagged , | Leave a comment

Packet Analyzer: 15 TCPDUMP Command Examples

Posted on December 27, 2010 by jlim0930

Thanks the geek stuff tcpdump command is also called as packet analyzer. tcpdump command will work on most flavors of unix operating system. tcpdump allows us to save the packets that are captured, so that we can use it for … Continue reading →

Posted in System Stuff | Tagged , , | Leave a comment

Oracle Database Startup and Shutdown Procedure

Posted on December 27, 2010 by jlim0930

thanks the geek stuff How To Startup Oracle Database 1. Login to the system with oracle username Typical oracle installation will have oracle as username and dba as group. On Linux, do su to oracle as shown below. $ su … Continue reading →

Posted in System Stuff | Tagged , , | Leave a comment

9 Linux ethtool Examples to Manipulate Ethernet Card (NIC Card)

Posted on December 27, 2010 by jlim0930

Thanks to the geek stuff 1. List Ethernet Device Properties When you execute ethtool command with a device name, it displays the following information about the ethernet device. # ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported … Continue reading →

Posted in System Stuff | Tagged , , | Leave a comment