Convert plain numbers to MAC addresses with Excel

We use the following formula if you need a – between the octets:
 =MID(c2,1,2)&"-"&MID(c2,3,2)&"-"&MID(c2,5,2)&"-"& MID(c2,7,2)&"-"&MID(c2,9,2)&"-"&MID(c2,11,2)

We use the following formula if you need a :
between the octets:
=MID(c2,1,2)&":"&MID(c2,3,2)&":"&MID(c2,5,2)&":"& MID(c2,7,2)&":"&MID(c2,9,2)&":"&MID(c2,11,2) - See more...

No DAHDI modules on the system. Not starting

You need to retrieve the correct kernel-devel for the kernel of linux you are running, and remake DAHDI from source
SSH onto the machine and run: uname -r
Note the kernel version. then, google for kernel-devel (kernel version) find a suitable download source (i.e. from rpm.pbone.net) then on the machine rpm -ivh ftp://ftp.is.co.za/mirror/centos/6.5/updates/x86_64/Packages/kernel-devel-2.6.32-431.1.2.0.1.el6.x86_64.rpm - See more...

GParted – “Bad sectors” Error Message

When using GParted to resize a partition on a hard drive you have cloned you may notice an exclamation mark on the drive.

When you attempt to apply the resize it will most likely fail, and you may receive an error message, similar to the one below, stating that there are “bad sectors” on the disk. - See more...

Office365 – Distribution list blank return path

When you are using Office365, you may find that external email addresses in a distrbution list do not recieve mails sent to the distribution list email address.

Many spam filters will block emails with a blank or empty return path, but Office365 sets this blank as default, to prevent email bounce loops.
This is normal behaviour – a large distribution list shouldn’t distribute a bounce/DSN report to the entire membership.
For a single membership list for use with Zendesk, Help Scout or other similar mailbox monitoring applications, it may be necessary. - See more...

Internet Explorer and HMRC – this file could not be downloaded

If you are unable to download P60, CT100 or VAT forms from the HMRC website, you may need to check that Adobe Reader is working correctly. Often, an issue with the installation will mean the PDF file from the HMRC site will not open automatically. The error message will then appear – “this file could not be downloaded”. Here is how to fix the problem: In Internet Explorer, go to Tools (or the small cog icon) then click Internet Options Select the Advanced tab Check the Do not save encrypted pages to disk option is ticked in the security section Click OK - See more...

Session setup failed: NT_STATUS_INVALID_PARAMETER

When trying to link to a Windows Vista, 7 or 8 shared printer from Mac OS 10.6 or newer, you may find that the printer gives this error message.
Essentially, SMB printing from CUPS (the Mac OS printing system) seems broken – it does not pass along the correct user name and password (even when entered manually). The solution is quite long winded… Firstly, ensure that the printer is shared on the Windows machine - See more...

On Hold (Authentication Required) – Mac OSX and Windows printing

The solution to this issue is the same as another error: Session setup failed: NT_STATUS_INVALID_PARAMETER We have detailed the solution here.
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