XceptN’s IT Blog

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

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…

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). (more…)

The released drivers need some good patching for rhel5 oel5 and OracleVM.

With traceroute-1.4a12-XX  the -F argument is used to avoid intra-switch fragmentation. From traceroute(8) manpage:

When ‘-F’  is specified the traceroute fails to get connected. Even with localhost: (more…)