Saurav Shah's questions

The command thats run is

yum install httpd git php php-cli php-mysql php-process php-devel php-gd php-pecl-apc php-pecl-json mysql-server

I get these errors. How do I fix these?

Error: Package: php-devel-5.3.3-3.el6_2.6.x86_64 (rhel6-optional)
       Requires: php = 5.3.3-3.el6_2.6
       Available: php-5.3.3-3.el6.x86_64 (rhel6-base)
           php = 5.3.3-3.el6
       Installing: php-5.3.3-14.el6_3.x86_64 (rhel6-updates)
           php = 5.3.3-14.el6_3
Error: Package: php-process-5.3.3-3.el6_2.6.x86_64 (rhel6-optional)
       Requires: php-common = 5.3.3-3.el6_2.6
       Available: php-common-5.3.3-3.el6.x86_64 (rhel6-base)
           php-common = 5.3.3-3.el6
       Installing: php-common-5.3.3-14.el6_3.x86_64 (rhel6-updates)
           php-common = 5.3.3-14.el6_3

I use nginx as a reverse proxy. Whenever I update the config for it using

sudo "cp -r #{nginx_config_path}* /etc/nginx/sites-enabled/"
sudo "kill -s HUP `cat /var/run/nginx.pid`"

I face a brief downtime. How can I avoid that?