If your Drupal instance on CentOS indicates that it requires Uploadprogress, here are installation instructions .
For CentOS 6.4+
Update September 11, 2013: v 6.4+ of CentOS requires a simpler install. If you have an earlier version of 6 skip this step and continue on. If you have 6.4 or greater you may skip the other steps and simply input this command in your terminal:
user@host $sudo yum install uploadprogress
For Earlier Versions of CentOS 6
First, let’s install php-devel which is a requirement of uploadprogress, then we can install uploadprogress itself.
root@host $yum install php-devel
root@host $pecl install uploadprogress
If uploadprogress doesn’t install due to Pear missing then install Pear and repeat the above step.
root@host $yum install php-pear
In some cases you may receive “error: no acceptable C compiler found”. If so, install GCC.
root@host $yum install gcc
To complete uploadprogress installation, in the Dynamic Extensions section of php.ini add:
Note: php.ini may be located in /etc/php.ini or if in CPanel configuration, /usr/local/lib/php.ini or /usr/local/Zend/etc/php.ini if Zend is installed.
root@host $service httpd restart
You should now have uploadprogress ready to go.