Month: December 2009

RHEL4 vs RHEL5

Posted by | Dec 5, 2009 | |

Major differences between RHEL4 & RHEL51.Virtualization added in RHEL52.Package installation method changed to YUM(Yellow-dog Updater Modifier) in RHEL53.Redhat Clustring added in RHEL54.RHEL5 now supports unlimited RAM and Hard disk5.Now varients in RHEL5 are * Red Hat Enterprise Linux Advanced Platform (former AS) * Red Hat Enterprise Linux (former ES) (limited to 2 CPU-s) * Red Hat Enterprise Linux Desktop with Workstation and Multi-OS option * Red Hat Enterprise Linux Desktop with Workstation option (former WS) * Red Hat Enterprise Linux Desktop with Multi-OS option * Red Hat Enterprise Linux Desktop (former Desktop)Where as in RHEL4 * Red Hat Enterprise Linux AS for mission-critical/enterprise computer systems * Red Hat Enterprise Linux ES for supported network servers * Red Hat Enterprise Linux WS for technical power-user desktops or high- performance computing * Red Hat Desktop ΓÇô for multiple deployments of single-user desktopsMinor differences1.Newer kernel(2.6.18)2.Newer softwares packages3.Office removed from Server edition4.More Hardware support5.By default netconfig command is not there, we have to install it manually6.SELinux improved a a lot in RHEL57.We have to provide key at the time of installation so that we can choose to install most of the packages such as Clustring/Virtualization.8.Some of the commands changed like in LVMReferenceshttps://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/release-notes/package-changes.htmlhttp://en.wikipedia.org/wiki/Red_Hat_Enterprise_LinuxPlease Comment your thoughts regarding this post:-) Please visit https://www.linuxnix.com for more linux admin...

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How To Open Big Size File Using VI Editor?

Posted by | Dec 3, 2009 | |

How to Open/edit large files using VI?Ans : Some time you will get message like file is too large to open with VI editor or some sort of other error messages like.  For Example : Warning: Tmp file too large This doesn’t mean that you don’t have enough space to open the file in /var/tmp (this is default VI editor temp location). This is because VI is having limitation in opening big files which is more than 9070000 character or file of size 2GB.This is a warning message you get from vi (i.e. the ex family of editors) that it can not track your changes in the temporary files, the editor maintains during an edit session. So when ever using VI editor remember following things(These are from VI editor manual). 1.If the editor crashes (i.e. system halts, or accidental process termination), a preserve file cannot be created and you will not be able to recover your changes via the recover feature(vi -r filename is used to recover a file from .swp file).2.In addition, while editing a very large files and vi fails to come up in visual mode, do not write this file (:w) since it may be truncated/crashed. You should quit (:q!) and open the file with csplit utility to divide the big file into smaller smaller files and edit(I don’t suggest this as it is very much advanced...

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My name is Surendra Kumar Anne. I hail from Vijayawada which is cultural capital of south Indian state of Andhra Pradesh. I am a Linux evangelist who believes in Hard work, A down to earth person, Likes to share knowledge with others, Loves dogs, Likes photography. At present I work at Bank of America as Sr. Analyst Systems and Administration. You can contact me at surendra (@) linuxnix dot com.