Category: Administration

Fortigate CLI

Get list of current DHCP leases including hostname (handy when trying to find a machine without FSSO) # execute dhcp lease-list IP Addresses of interfaces. Make sure NOT to hit enter, just hit question mark. # show system interface ? System Information such as model Show TOP system processes. # diag sys top Who’s logged in? […]

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Citrix Xenserver & Ubuntu 12+ VM’s fail to boot / missing bootloader

Error in XenCenter when booting some Linux VM’s using out-dated templates ie XenServer’s paravirtualized bootloader (pygrub) is unable to handle the newest versions of Grub bootloader in VM’s Specific error message “The bootloader for this VM returned an error – did the VM installation succeed? Unable to find partition containing kernel” Disclaimer: Make a backup […]

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FreeNAS 8.3 ISCSI & XenServer

Experienced something very strange in our XenServer farm. Noticed some VM’s were shutdown while others appeared UP, however, not responsive. I restarted the FreeNas server after trying to restart the ISCSI service failed. The server experienced a complete power outage in our datacenter even though it was plugged into A & B power. I’ll get […]

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Xenserver Love/Hate Part DUX

Yes, I purposely misspelled the topic! I left off with converting many ESXi VMware 4.1 Windows VM’s to Xenserver 62. All but one in particular would migrate and boot fine, however, upon a reboot or shutdown, the VM would BSOD with a winlogon.exe error specifically the file “VMUpgradeAtShutdownWXP.dll”. HUH? Doing some research *cough* Googling; found […]

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LinuxMint standing upgrade gone wrong

So impressed with LinuxMint 14 running Cinnamon on an older Sony VGN-NW240F Laptop; decided to upgrade to 15 “Olivia”. Ran through the necessary steps #apt-get update #apt-get dist-upgrade After several interruptions requesting Y/N questions, I answering Y to all and final reboot and DANG-IT! Many items missing, the login jacked; downloaded the 900MB ISO and […]

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Multiple ISP Failover Routing…do you really know what you think you know?

I’ve run across many “network” admins out there and to be fair, many know what they’re doing on a basic level; but when it comes to network routing – the understanding is not understood? Assumption: Network layers; physical ie link detection are understood. For instance, the topic of failover or load-balance always enters a conversation. […]

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