Saturday, 14 December 2013

What is RAID and LEVELs of RAID?

On this article we have explained the concept of Redundant Array of Inexpensive Disks or RAID with diagram. What is RAID or  Redundant Array of Inexpensive Disks or RAID ?

Sunday, 8 December 2013

Unix/Linux : Difference between sh , csh , ksh and bash Shell

Most of the time we get confuse with the fact that what is the difference between sh , csh , ksh and bash Shell . First let's revisit the definition of shell again ?

What is Shell in Unix/Linux ?



Thursday, 5 December 2013

Unix Linux : Remote passwordless authentication via ssh keys

On this article, we will see ssh key authentication configuration between two system for a user . Here the source machine is server_X and target machine is server_Y . We will established a ssh key authentication  between from server_X to server_Y . ssh key authentication help us to ssh or login to any machine without prompt for password . Hence ssh key authentication is also called password less login . It is very useful for an administrator to make this automate.


Sunday, 1 December 2013

Unix : Find Command with Examples

On  this article we have listed Find Command with Examples . Find command  is one of most used command and power full command . I used this command on daily basis and this article is based on my experience with 9 examples .


Tuesday, 26 November 2013

IBM AIX : Accessing OLD ROOTVG or ALT ROOTVG filesystems

Sometimes it is required to access OLD_ROOTVG or ALTINST_ROOTVG ( alternate rootvg ) filesystems for copying files and directories to current OS or viewing logs for trouble shooting after a AIX upgrade or during a upgrade. We can access OLD_ROOTVG or ALT_ROOTVG  filesystems for copying files and directories , viewing logs by "wake_up" OLD or ALT rootvg while we are in the current OS shell.