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XceptN’s Tech Stuff

All About Tech

Month: March 2009

How to Set/Check the Arguments Used with “ntpd” Service

On RHEL, OEL, CentOS and various other Linux distribution the Network Time Protocol (NTP) daemon can be run with various options.

linux

How to Recursively “grep” a Subdirectory for a List of Files

See http://www.commandlinefu.com/commands/view/1566/recursively-grep-a-subdirectory-for-a-list-of-files (great site BTW)

desktop

Unix / Linux Job Automation “crontab” Tips

Below are the tips I keep in mind with respect to crontab file format / configuration on Linux and Unix systems.

linux

Twitter Automation & Programming Twitter Engines

The awesome micro-blogging system twitter is the new viral in the social media networking and the online marketing area. There are a lot of key parameters in the twitter area. Some are:

python

Comparing and Measuring Performance of Linux Filesystems

There are various filesystems on Linux, some being cluster aware, some being taking care of data integrity and so on. I have been using tools below to measure and compare performance of each: bonnie dbench postmark iozone Hope that helps…

linux

How to Replace the Background Image of a WordPress Theme

For the wordpress theme you are using on your blog, you might like to change the background image. Some themes support that directly and some don’t. But you still have a chance.

blogging

How to Use “tcpdump” to Log OCFS2 Interconnect (o2net)?

If from the /var/log/messages you are receiving network / o2net related errors and some OCFS2 / system functionality is not available or not working properly, generating a ‘tcpdump’ over the network interconnect may help to diagnose the problem for root cause analysis (RCA).

linux

How to Enable XenStore Tracing for Xen / OracleVM?

In /var/log/messages you see that there may be some problems with the XenStore Daemon (xenstored) of the Oracle VM  or Xen Server. In some cases it will be useful to have a debug trace of XenStore daemon for its operation. 

OracleVM

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