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Adding a group for to a logged in Linux user

Once in a while I want to add my user to a group and then right away make use of that group.

Unfortunately, in general Unix kind of forces you to re-log in for the new group to be attached to your account.

However, a command has been added, a while back, to do just that on the fly. Not something you would want to use in a script, but at least, it works for me when doing a few things here and there.

In my case, I wanted to run QEMU, which I hadn't done in a while, and the system told me that it could not open the KVM, the error: kvm permission denied.

The problem was that I was not part ...

Installing / Upgrading SugarCRM

Preparations after unzip

Installing SugarCRM is generally easy, but if you don't want to just make everything writable by Apache, you may find it tricky, especially if you have problems setting up the system.

First of all, you want to get the code from SourceForget.net and extract it in the root directory of the website where you want to use it. I prefer to dedicate a sub-domain name such as crm.m2osw.com to make use of SugarCRM. That way I don't have to deal with other weird things of using this under a sub-directory.

Once in there, the user and group should be a user other than ...

Cannot log in user with Samba

Today I wasted another hour or so in trying to get samba to work for one of my Windows computer so I could connect to one of my Linux computer. I knew that the installation was correct since I could log in with another computer/user that had worked for a long time. So... why would this one fail?

Two things, for of all, I could see NOTHING happening in the logs. Really wondering why the default is to log close to nothing with such a non-secure piece of software, but that's a different question. I added the following to actually get about enough logs to understand what was happening:

log ...

MS-Access and Focus handling

MS-Access can be programmed with VBA which is neat. I do that a lot because the default forms do not allow you to strongly verify the data validity or even better: prevent you from editing certain record because they are too old, you don't have permissions, it was already archived in some way (i.e. invoice paid), etc.

However, I often encounter problems with the focus. The main thing I do to make it as safe as possible is show or hide buttons. If you cannot activate function A, then there is no point in having a button for function A. Instead, we should hide the function A button when we ...

Getting Ubuntu to playback DVDs

In order to playback a DVD you need to make use of commercial encryptions (also called codecs.) Actually Ubuntu calls them "non-free". The reality is these are patented and protected so people cannot just ripoff a DVD. Which is not true at all since pretty much any computer can play DVDs and thus can copy all the data. Anyway, because Ubuntu is by default for free software, it doesn't include all the necessary DVD stuff. This being said, they provide 100% of all the necessary code, pre-compiled and all you have to do is install it all with apt-get as follow.

(You must be root to ...

WNetAddConnection2 function, how to

Introduction

I just faught for a few hours trying to get the WNetAddConnection2() to work in my program and found out two things that I did not see explained anywhere in the documentation...

Folder that Works

I'm not too sure whether that's a new thing at the company I worked in to implement this function or whether that's every time, although I've seen other posts on the Internet with the same sort of path so I would imagine that this is a "normal" Microsoft network feature.

The fact is that to connect you have to use the name of the server followed by some ...

WordPress user "nicename" and spaces

Today I noticed that I had quite a few 404 errors on one of my websites. That one uses Wordpress that I got from someone else. Because I wanted to include a blog, I had to change the login name and Wordpress does not allow you to do that by default.

So to change the login and password, I directly edited the database makeing user 1 me, essentially.

I replaced the user_login and user_nicename with my own name. This worked just fine. At least at first it looked like everything was working right. Then I noticed that the author link had my name in it. The one with the space. Something like ...

One computer, multiple users (Multiseat with X11)

I have been wondering about setting up one of my computers for 2 or 3 users with 3 mice, 3 keyboards and 3 monitors.

This apparently may require 3 video boards with Ubuntu. That could be a problem with AGP, but PCI Express may work fine with that. Only problem, in most cases boards only have 2 slots these days...

Anyway, if I ever try to do that, I'll put the info here on how I got it to work... for now, you'll want to look at this page on Ubuntu:

https://help.ubuntu.com/community/MultiseatX

https://wiki.ubuntu.com/MultiseatTeam/Status

...

Getting username or computername with MS-Access

Introduction

These are common questions for MS-Access users:

  • How can I get the name of the currently logged on user?
  • How can I get the name of the computer the user is working on?

Both names are available in the Kernel and we can make use of a function declaration to access those names.

MS-Access Functions

To determine the name of the current user:

Private Declare Function GetUserName Lib "advapi32.dll" _
    Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long

Public Function GetLogonName() As String
    Dim lpBuf As ...

Wordpress Media Upload returns IO Error

I got a new word press website a couple days ago and got it installed in the last few days. There were 3 images missing so I started working on getting them in. When I got the first image, I went to Wordpress and I got an error... with no detailed explaination (maybe there is a log, but I don't know Wordpress that well to tell.)

The error message was just: IO Error

I was pretty sure that the problem was just that the folder where Wordpress tries to upload the new content was write protected from the Apache user. Under Ubuntu and Debian, the default name for that user is www-data and

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