About This Journal
Technical concerns tend to find a solution as long as there are good people working on them. And Linux has the very best. - Linus Torvalds
Solving IE7 Caching issues on the Perl-CGI page
May 10th, 2008 by 
pepesmith
Solved by adding the following html code:
<head>
<meta http-equiv=”PRAGMA” content=”NO-CACHE” />
<meta HTTP-EQUIV=”Expires” CONTENT=”-1″>
</meta>
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Get the Distro version of your GNU Linux
April 2nd, 2008 by pepesmith
To determine the version of a linux OS, a command cat will be helpfull enough.
Here is the command:
#cat /proc/version
Linux version 2.6.18-4-amd64 (Debian 2.6.18.dfsg.1-12) (waldi@debian.org)
(gcc version 4.1.2 20061115 (prerelease)
(Debian 4.1.1-21)) #1 SMP Mon Mar 26 11:36:53 CEST 2007
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Debian XSP problem (service temporary unavailable)
March 22nd, 2008 by pepesmith
Service Temporarily Unavailable
The server is temporarily unable to service
your request due to maintenance downtime or capacity problems.
Please try again later.
——————————————————————————–
This is the error i’ve encounted on my server when I try to enable the XSP2 capability of my debian box. By the way XSP (and XSP2) is a webserver written in C# that hosts ASP.NET’s System for GNU Linux and other UNIX operating systems.
To fix this issue, the line of /etc/mono-server2/mono-server2-hosts.conf which contains:
MonoServerPath /usr/lib/mono/2.0/mod-mono-server2.exe
must be changed to:
MonoServerPath default /usr/lib/mono/2.0/mod-mono-server2.exe
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Xen Guest (domu) systems time reset
March 22nd, 2008 by pepesmith
Lately, I’ve noticed that the date and time of my xen guest is not accurate. I’ve decided to reset it using the date command.
This is the wrong date
debianguest:/home/pepesmith# date
Tue Feb 19 11:23:01 PHT 2008
To change it, i issued (the date should be 22 March 2008 11:28):
debianguest:/home/pepesmith# date "032211282008"
Sat Mar 22 11:28:00 PHT 2008
I really expects that the date command issued will take effect. So to confirm that the date really was changed I issued again a date command.
debianguest:/home/pepesmith# date
Tue Feb 19 11:24:01 PHT 2008
And to my surprise the time is still not changing!
I suspect that something is wrong with the setting thus I go to the Dom0, the host server. I observed that the time being used by the guest is similar to host systems clock. So I decided to changed the host systems time. I’ve checked again the systems time of the guest. This time I’ve realised that the guest time is very dependent on the host. A guest systems time may be changed but then after few minutes (seconds), it will use the host systems time.
Googling for some answers, I’ve stumbled across the answer from a mailing list.[1] It is saying that a command :
echo 1 > /proc/sys/xen/independent_wallclock
should be issued. And when I issued the command and observed the guest for a few minutes, the system clock stays the same as I expect it to be.
The only problem is that when a user reboots the guest, the value 1 of the file /proc/sys/xen/independent_wallclock returns to 0.
But i think the problem will be solved by a creating a startup script that updates that particular file.
[1] http://lists.xensource.com/archives/html/xen-users/2005-05/msg00169.html
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TracError: Database newer than trac version
March 20th, 2008 by pepesmith
I have moved my trac records from a Redhat-based linux distro (running as guest virtual machine to my own debian etch box) to another guest machine which runs a debian etch. What i did was to simply copy the content of the entire project directory and then put it on the destination directory. But then when I tried to browse on the trac which i”ve just installed an error occured and this is the error:
TracError: Database newer than Trac version
This problem was then fixed by running the sqlite3 and loading the trac.db with the use of following statement:
update system set value = 19 where name = "database_version";
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