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This site is a collection of my own work with Linux. Certain things are easy, others take time to decipher and if I ever need to repeat the work (which usually happens!), then I need to remember everything by memory or... have a site with all the steps taken and to take again.

The following are my most recent posts:

Forbidden -- client denied by server configuration

Working on a PHP application setup, I stumble upon a problem. Going to the installation page, I got the dreadful error:

Forbidden

You don't have permission to access <root-path>/admin/install on this server.

Looking at the error logs, the only thing reported was:

client denied by server configuration

The fact is that Apache does not tell you which setting actually forbids the access. I guess that's because once it gets checked by Apache, it is a blend of all the settings and not a tree being followed.

Looking a round, and since I already had that error not too long ...

I work with Apache a lot. It is a really good web server that has many options and features. Unfortunately, maybe it has too many of them!

I ran in a problem where a notification from one server to another would fail with the following error:

[Fri Oct 11 19:43:50 2013] [error] [client 162.226.130.121] client denied by server configuration: <path to file>

Looking at the error, I was first thinking that my script was generating the error. The fact is that my script does not generate error 403. It has a 400 and 500 but not 403.

So looking at the error I thought, maybe that's an ...

Full Update

Once in a while, I update my policy file because tripwire tends to checks EVERYTHING and many things are being updated on a constant basis (such as the letsencrypt files which appear under /etc/letsencrypt/..., which should use /var/lib/letsencrypt/..., but I digress here...)

So as a result I have to update the file and to do so I edit my twpol.txt file and then run the following three commands to update the database:

sudo twadmin --create-polfile --cfgfile tw.cfg --site-keyfile site.key twpol.txt
sudo rm /var/lib/tripwire/hostname.twd
sudo tripwire --init

The ...

My syslog was filled up with errors such as this one:

    Sep 27 00:58:42 halk postfix/error[16751]: 628254C02F0: to=<mo_fax@m2osw.com>,
    relay=none, delay=1.8, delays=0.06/1.6/0/0.14, dsn=4.4.1, status=deferred
    (delivery temporarily suspended: connect to mail.m2osw.com[69.55.231.156]:25:
    Connection timed out)

I've been wordering for a while, since I can use Thunderbird with a direct connection to my server, I was not too concerned, but tonight I really needed to support those emails because I have work to do that requires it.

Got NVG510 to setup?
Hacking my ...

Ubuntu 12.04 to 12.10

I just upgraded from 12.04 to 12.10 and my desktop was fully reset to the defaults. Rather annoying.

The worst part is that I tried to do things such as reassigning the Alt-F1 and Alt-F2 keys and it did not work. Somehow the default Gnome keys remained in effect!

I found the solution on Ask Ubuntu.

gsettings set org.gnome.desktop.wm.keybindings panel-main-menu "[]" # disable Alt+F1
gsettings set org.gnome.desktop.wm.keybindings panel-run-dialog "[]" # disable Alt-F2

Editing the preferences did not work at all.

Source: ...

Brdige between your Host and Guest computers

I use VirtualBox and had a problem with copying files between my host (main computer on which you boot your computer) and the guests (virtual computer that you run on your host).

The fact is that it is all explained right here:

http://www.virtualbox.org/manual/ch04.html#sharedfolders

There are a few steps as follow.

Using scp

Here, I have an example of GParted where I could not install the VirtualBox tools as mentioned below. This is mainly a matter if setting up an SSH server and allowing connections for a given user.

Install the VirtualBox Tools

Install the Virtual Box Tools ...

tripwire --init not saving the database

Error: File seek failed

I ran in a problem with tripwire, it did not want to generate the <hostname>.twd file under /var/lib/tripwire. You know that the file is missing because you receive emails (reports) by tripwire that the file is missing.

I could see that because it reports, once a day, whether tripwire ran sucessfully or not. It was not and the main error was: the tripwire database does exist which is actually shown as:

### Error: File could not be opened.
### Filename: /var/lib/tripwire/<hostname>.twd
### No such file or directory
### Exiting...

That, ...

As we are upgrading our server to jump from version 12.04 to 13.04, we encounter a few problems.

Two with Postfix, first the Postgrey port has changed. It was 60000 before, now it is 10023. Don't ask me... Anyway, that was the easy one.

The other problem was a relay error. I could send emails all I wanted, but not my partner who does not show his server as part of our Made to Order Software Corp. network. Relay is why a computer allows emails from server X to be sent to server Y through server Z. You are server Z, that's the relay.

The fact is that if you can log in your account on ...

As I was moving my Drupal 6.x websites from an old server to a new one, I decided to make use of the newest PostgreSQL database system because over time I've notice quite a few things that got fixed and thus it is a lot better! (It is not as exciting as moving from 7.4 to 8.0 way back then, but still!)

Doing so, my Drupal site started showing WSOD (White Screens Of Death). Looking at the errors in my apache2 logs, I noticed that the error was in link with the cache. Looking closer, I could see that the cache (one of the only table doing so) makes use of the %b flag which means blob. It ...

As I am working on wpkg, a tool to build and manage advanced packages, I encounter problems running MS-DOS scripts. I am not the strongest in that realm. I have been working with Unix scripts for a little over 15 years and MS-DOS scripts are so limiting...

Anyway, to run a batch file, you need to write a script in a file that ends with .bat and to make sure it gets run properly, you want to run it using the %COMSPEC% command using the /c flag.

If parameters to the command include spaces, you want to place those parameters between double quotes. Although some commands are capable of ...

Unfreeze your Mouse when it Froze

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Forbidden

Full Update

Using scp

Install the VirtualBox Tools

Error: File seek failed