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Home » Archive for category "OS"

Category Archives: OS

Navigating to a server alias locally (from itself) in Windows

Posted on September 28, 2015 by Garth

I stumbled across this problem the other day whilst trying to setup a new Log Shipping configuration in SQL Server.  The big difference in this environment, was that this implementation had DNS records in place to route the DR (Disaster Recovery) traffic via it’s own dedicated link. So for example, when specifying the database backup location,

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Posted in OS, Windows | Tags: alias, BackConnectionHostNames, DisableStrictNameChecking, Log Shipping, setspn | Leave a comment |

Useful HP-UX commands

Posted on April 18, 2013 by Garth

An ongoing post detailing some everyday HP-UX commands…which I keep forgetting 😉 Check whether your server is 32-bit or 64-bit: # getconf KERNEL_BITS # print_manifest | grep “OS mode” Display network packets: # nettl -start # nettl -status all Memory details: # dmesg | grep -i physical # /usr/sam/lbin/getmem Swap info: # swapinfo (displayed in

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Posted in Linux & UNIX | Tags: commands, hardware, hp-ux, kernel, memory, network, swap | Leave a comment |

Installing nmon on Linux 6

Posted on April 11, 2013 by Garth

The nmon (Nigel’s Monitor) tool was written initially for AIX to monitor system performance, but there are plenty of distributions available now so people can use it on a variety of operating systems these days, including flavours of Linux and even the recent Raspberry Pi (mini ARM based computer). It’s one of my favourite performance monitoring tools

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Posted in Linux & UNIX, OS | Tags: aix, linux, monitoring, nmon, performance, statistics | 1 Comment |

Internet and SSH access to VirtualBox VM with NAT and host-only adapters

Posted on April 4, 2013 by Garth

Having only recently started using VirtualBox to build various VMs (Virtual Machines), it wasn’t immediately obvious to me how I could not only enable access to the outside world (Internet access, updates etc.), but also enable SSH to Linux boxes and such like via a private network within VirtualBox. Eventually, I decided to configure each

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Posted in VirtualBox | Tags: host-only, nat, network, private, virtualbox | Leave a comment |

Oracle Linux 6.4 installation (64-bit)

Posted on March 21, 2013 by Garth

First of all, you need the OS installation media, which can be downloaded from the Oracle Software Delivery Cloud at http://edelivery.oracle.com/linux (login required). For this particular installation, I downloaded ‘Oracle Linux Release 6 Update 4 Media Pack for x86_64 (64 bit)’ which is listed as part V37084-01. In this instance, I then created a Virtual Machine using VirtualBox

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Posted in Linux & UNIX, VirtualBox | Tags: install, linux, virtualbox, vm, yum | 8 Comments |

Automating relocation of targets within EM for HP-UX Serviceguard

Posted on March 6, 2013 by Garth

Recently, I found myself in a situation whereby multiple database instances were running on a HP-UX clustered environment to ensure high availability, each with their own Serviceguard package, on an agent per package basis. Now on the plus side, if the SG package is failed over to another node, the agent goes with it, and

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Posted in Cloud Control 12c, Grid Control 11g, Linux & UNIX | Tags: cloud control, cluster, emcli, grid control, ha, hp-ux, relocate, serviceguard, targets | 2 Comments |

SSH X-11 forwarding and magic cookies

Posted on February 22, 2013 by Garth

It’s been years since I stumbled across this, but today I was trying to launch a GUI from new Linux server and got this instead 🙁 X11 connection rejected because of wrong authentication. Error: cannot open display: localhost:12.0 So, I dug out my notes and thought it would make sense to then blog it for

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Posted in Linux & UNIX | Tags: magic cookie, ssh, x-11, xauth | 4 Comments |

Readable df -h output in HP-UX

Posted on October 16, 2012 by Garth

After my first encounter with a HP-UX system recently, I soon discovered that annoyingly, neither the df -h or df -g commands work in HP-UX! There are other commands such as df -PK or bdf I’ve found that can provide you with a more readable view of the filesystems, but after a bit of faffing around, I put this together instead:

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Posted in Linux & UNIX | Tags: filesystem, hp-ux | 10 Comments |

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