Author: Surendra Anne

How to install NAGIOS in Linux/Unix?

How to install NAGIOS in Linux/Unix?

Posted by | Jul 28, 2009 | |

N.A.G.I.O.S NAGIOS(N.A.G.I.O.S. is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood", "Sainthood" being a reference to the original name of the software, which was changed in response to a legal challenge by owners of a similar trademark). –wikipedia.org NAGIOS is a system and network monitoring application that watches host and services that we specify as well as alerting when finds any error. NAGIOS is implemented by using SNMP protocol, so which ever devices support SNMP we can monitor that device using NAGIOS. NAGIOS can do following things 1.Monitor wide range of hosts like Servers,Switches,Routers etc. 2.Monitor network services...

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All about ISO image files

Posted by | Jul 10, 2009 | |

ISO IMAGE FILESWhat are ISO image files?An ISO image is an archive file (also known as a disk image) of an optical disc in a format defined by the International Organization for Standardization (ISO). ISO image files typically have a file extension of .iso. The name ISO is taken from the ISO 9660 file system used with CD-ROM media according to wikipedia.org. So these are the basic points i am going to cover in this post How to create an iso file? How to mount an iso file? How to unmount an iso file? How to update an iso file? How to write an ISO file to CD? How to view content of iso file? 1)How to create an ISO image?As of now I know two methods to create an ISO file. One is through dd command(disk dump) and other is mkisofs command A)Creating ISO files from cd-rom/dvd by using dd command #dd if=/dev/cdrom of=/temp/songs.isodd if=/dev/dvd of=/temp/songs1.iso # for dvddd if=/dev/scd0 of=/temp/songs2.iso # if cdrom is scsi Let me explain what actually the above command will do. dd is a disk dump command which will present in most of the Linux/nix systems and “if” specifies input file and “of” specifies output file. So we are specifying to dd command what is our input file and where is our output file.Here my songs.iso file is created in /temp folder. B)Creating...

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How to implement RAID10?

Posted by | Jul 4, 2009 | |

RAID10 can be implemented by first implement RAID1(ie mirring) then implementing RAID0(stripe set on different disks) on it. Configuring RAID10 Step1:Get the info who many devices are participating, for example here we taken 4 disks(/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1). Step2:Implement RAID1 on four drives(taking 2 each) #mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sd[ab]1 #mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sd[cd]1 Step3:Now implement RAID0 on two of RAID1 devices(/dev/md0,/dev/md1) #mdadm --create /dev/md2 --chunk=64 --level=0 --raid-devices=2 /dev/md[01] Step4:Format the RAID10 device with ext3 and mount the device #mke2fs -j /dev/md2 #mkdir /store #mount /dev/md2 /store Unconfiguring RAID10 Step1:Unmount the RAID device /dev/md2 #umount /dev/md2 or #umount /store Step2:Stop the RAID device #mdadm --manage /dev/md2 --stop #mdadm --manage /dev/md1 --stop #mdadm --manage /dev/md0 --stop Step3:Remove the Disks(/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1) by using fdisk utility  Please visit https://www.linuxnix.com for more linux admin...

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ABOUT ME..!

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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.