How do I add more information to Host and Service definitions and then use that information as variables. For example if I want to include more information in the email notifications sent by Nagios. Create Custom Object Variables and Custom Variable Macros Create Custom Object Variable Add [continue...]

How do I increase the capacity of my LVM  partitions in linux if I add another disk or raid array You need to add the new physical volume, extend the volume groups, increase the logical volume and resize the file system Create the Partition with id LVM Linux sd(x) where x is the new disk a,b,c,d [continue...]

How do I check LSI MegaRAID controller and raid array status on a  linux server Use the LSI MegaRAID megarc command line cli tool Download the megarc tool Download the megarc.bin utility which can be downloaded from LSI website at http://www.lsi.com/downloads/Public/MegaRAID Common [continue...]

How can I easily manage iptables ? With a GUI based iptables configuration program called FireStarter. Note: If you installed your server without a GUI then FireStarter is not for you. Firestarter RPM Centos 6 As the writing of this article I could not find an RPM package in [continue...]

How do I backup and restore Esxi 4 settings or configuration Use the vCLI and vicfg-cfgbackup.pl command Download vCLI Download vCLI and install ( I used the Windows version but there is a Linux version) Launch vCLI Windows – Start -> Vmware -> Vmware vSphere CLI Command prompt box [continue...]

Problem: Western Digital 2TB or other TB drives appear under disk utilities but not under Array Configuration Utility. Create Array gives error no drives found Solution: Upgrade the Serveraid firmware to V5.20 Build 16xxxx using IBM ServeRaid Support CD v9.20 Upgrade IBM ServeRaid 8k [continue...]

How do I manage Hardware Raid on a IBM ServeRAID 8k/8k-l8 from centos linux Install ServerRAID Manager from IBM. For GUI interface use the RAIDMON and for CLI use arcconf How to get ServerRAID Manager for Linux There are two ISO’s for download. One is the ServerRAID Support CD and the Other [continue...]

############################################################################### # NRPE CHECK COMMAND # # Command to use NRPE to check remote host systems ############################################################################### define command{ command_name check_nrpe command_line [continue...]

How can I use apples afp protocol to connect to my linux box ? Configure your linux box to be a Mac file server using netatalk afpd and avahi-daemon This install was done on a Fedora 11 system Install Netatalk Afpd and Avahi-Daemon # yum install netatalk avahi Configure Appletalk Netatalk # vi [continue...]

Question: How do I setup Centos to be an iscsi san server Answer: Install scsi-target-utils How to install scsi-target-utils # yum install scsi-target-utils Configure service to start on boot # service tgtd start # chkconfig tgtd on How to create iscsi drives called targets iSCSI is comprised of [continue...]