Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base


VxVM : Recovering the mirrored volume with both sides of mirror components ( plexes) had Error State

This post is continuation to the Yogesh’s recent post ” Recovering Disabled Disk groups” ( which is talking about recovering Disk group which has no volume issues at low level but just failed to initiate during the start up),  and also related to the post  “Recovering...


Solaris Troubleshooting DNS : Checking DNS settings to troubleshoot sendmail

In this post we will discuss about the commands to check DNS configuration and functions for sendmail. Follow these steps to: ensure dns client configuration is in place and enabled; verify mail exchanger lookups are successful (if using DNS for mail exchanger lookups). To resolve error...


Basis Filesystem Management in Linux

In this doc I am trying to present base for Linux Filesystem. I tried to cover Theoratical and Pratical portition where-ever it is necessary. What is Filesystem In simple term you can say a FS is a medium to access your files/directories in any Unix Flavour....


Solaris Troubleshooting : Calculate Collision rate in ethernet network

Collisions may occour on ethernet links which are operating at Half Duplex (HDX). They do not occour on links using Full Duplex (FDX). The normal formula to calculate the packet collision rate is: ( collisions / output packets ) * 100 = collision rate For example: #...


Sysadmin BestPractices: Configuring loghost on Sun Fire 3800, 4800, 4900, 6800 and E6900

It is considered a ‘Best Practice’ to configure a ‘loghost’s for each server and production domain. A ‘Loghost’ on a Solaris platform can permanently save messages that are logged in the System Controller’s NVRAM buffer. This will insure that they are not lost due to either a...

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