linux

Apache not sending changes in js and css (virtual box)

I am using a solution of vbox (virtual box) and shared folders in our windows work environment (yes, unfortunatelly, but the IT team is in his right to decide which machines we have to use).

Everytime the vbox start, it mounts "automagically" one of the shared folders in the linux host (centos and archlinux, one day I will explain why). So then, apache has all what he needs in /var/www/html/ (simply mounted with "mount /var/www/html") (see automatically mount directories in vbox).

So far, everything was working fine... until I started to make small changes in small files. Absolutely surprising because when I deleted the complete code in the css or js file, for example, and I updated the browser, the screen appeared white, so everything seemed ok. But not at all, dealing with small changes, like adding a line in your css simply add no effect, the change is here, but seems that Apache or the browser didn't like it, simply it was being ignored.

After a while struggling about the browsers cache and even restarting the virtual box I finally decided to dig into Google.

I found the problem in the frankooh blog and it seems that it is a vbox problem, exactly a vboxsf problem with Apache.

The solution is simple, go to you apache configuration (in centos /etc/http/conf/httpd.conf) and uncomment the line:

EnableSendfile Off

After restarting Apache all the changes were sended to the browser without problems, even the small ones.

PS: be carefull with case sensitive off != Off 

warning: date(): It is not safe to rely on the system's timezone settings

The error is quite enoying:

warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'GMT/0.0/no DST' instead

But it is quite simple to correct. It is not a drupal problem, but a linux/apache. Just go to your php.ini, for example /etc/php.ini in CentOS and add this line:

date.timezone = Europe/London

reboot apache and the problem will have dissapeared.

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changing vhost.conf without restarting apache

Sometimes you need to change some parameters to your apache virtual host. Then, when you need to check the changes, in plesk you'd probably will have to execute the next command to see the changes:

/usr/local/psa/admin/sbin/httpdmng --reconfigure-domain exampledomain.com

Otherwise, restarting apache (/etc/init/apache2 restart) could not make the trick.

I allways forgot this little trick... never more, because Programadores Web will remind it me :-).

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Developing under Linux Apache in windows

Contradictory? Yes, a bit, but you cannot allways choose the systems and architecture in which you are working.

solution? Runing apache under linux instead of runing wamp or some weird solutions like that (i don't like at all, sorry).

First, install vbox: https://www.virtualbox.org/

Second, download the iso of your preffered linux distro, and install it.

Third, when you machine is running, go to Devices>install guest additions.

Now you have to come back to your linux machine, and install a few things, kernel upgrades included (if needed).

 

  • yum install gcc -y
  • yum install kernel sources -y
  • yum install kernel-devel -y

 

 

Reboot your system, and mount:

 

  • mkdir /media/VirtualBoxGuestAdditions
  • mount -t vboxsf /dev/cdrom /media/VirtualBoxGuestAdditions

 

 

 

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Centos tips

 

 

  • Configuring your network to start when booting: chkconfig network on (via http://nixcraft.com/centos-rhel-fedora/18643-centos-linux-6-2-eth0-netwo...)
  • configuring services to start apache (or any other daemon) when system boots: chkconfig --level 2345 httpd on
  • ... more coming
  • Override Apache permissions problem: "You don't have permission to access ... on this server". Simply execute: setenforce 0

 

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Accessing centos apache/httpd from vbox host

This is the scenario. You installed vbox in your Mac, windows or Linux computer. Then you´ve installed Centos or Red Hat (or any other Red Hat flavor) in this virtual box.

Next step, installed httpd (apache2) and... even it is running and httpd status confirms it with a "running" message, it cannot be accesible from your host machine.

The problem is on iptables. Red Hat by default denies access to this machine from other (external) machines. Solution? Very easy, open iptables file:

vim /etc/sysconfig/iptables

(vim is my favourite editor for a loooong long time)

Look for this line:

-A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT

and after that, add this one:

-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT

Restart your services and everything done:

service iptables restart

Thank to http://www.fliquidstudios.com/2009/06/18/creating-a-virtual-development-...

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