Category Archives: Operating Systems

How 2 Know OS Version on alt_inst_rootvg online

  There is a helpful command to check the OS Release on the Alternative Disk in AIX without booting from it or wakeup   /usr/lpp/bosinst/blvset -d /dev/hdisk0 -g level

List ALL ASM Disks with header ( AIX )

Hello ALL,,   Below is script Tested on AIX Environments to List ALL ASM Disks ( Oracle ASM ) with SN , Header of DIsk , Major and Minor ,,  

AIX Duplicate Node ID

This small article describes how to change the ct_node_id in case two LPARs have the same. 1. Duplicate Node ID after LPAR Cloning When you clone an LPAR by splitting up a copy of the rootvg of an existing LPAR … Continue reading

Detect SAN Switch from AIX Side

Sometimes AIX Admin need to be sure that the System is connected to different SAN Switch for more redundancy and stability. Follow below steps to check SAN Switches from AIX Side: # lsdev |grep fc fcs0 Available 24-T1 Virtual Fibre … Continue reading

Recursively replacing a string in all files in a directory

You can use the following command to change Specific string on all files under specific directory: find /u01/directory -type f | xargs perl -pi~ -e ‘s/oldtext/newtext/g;’ Tested on Linux & AIX Ref: https://blogs.oracle.com/rammenon/recursively-replacing-a-string-in-all-files-in-a-directory-linux

Solaris Quick Start

You can download the following PDF which you can use it for a quick start on Solaris: solaris-quicksheet the PDF file taking about the following outlines:

Shell Script Quick Sheet

The following link containing a quick sheet to start on Shell Script: shell-quicksheet The Sheet has the following outline: Variables Relational operators Pattern matching Functions Shell math Test conditions Flow control Sample snippets Special variables Conditional commands Trapping signals Output … Continue reading

Change default values on ODM for Fibre

Hello Everybody … Sometimes for performance recommendations or redundancy solutions, you will need to change some parameters on fibre card, like fc_err_recov & dyntrk TEST_SERVER#lsattr -El fscsi0 attach none How this adapter is CONNECTED False dyntrk yes Dynamic Tracking of … Continue reading

Script to list disks Info

Hello Everybody, The following lines are a for loop script to display disks info @ AIX System (Disk Name, Disk Unique ID, Disk Size in MB) and of course you can customize the data by add more columns:

Couldn’t canonicalise: Permission denied

If your work on AIX System (or any other UNIX/Linux Distribution), may be you face the following Message when you try to access SFTP: Couldn’t canonicalise: Permission denied Need cwd after many troubleshooting : – user can access SSH without … Continue reading