chmod Joomla 3.0
āļĢāļēāļĒāļāļēāļĢāļ•āļąāđ‰āļ‡āļ„āđˆāļē Permission āļŦāļĢāļ·āļ­ chmod āļŠāļģāļŦāļĢāļąāļš Directory / Path āđƒāļŦāđ‰āļāļąāļš Joomla Version 3.x

chmod -v 0777 administrator/components
chmod -v 0777 administrator/language
chmod -v 0777 administrator/language/en-GB
chmod -v 0777 administrator/language/overrides
chmod -v 0777 administrator/manifests/files
chmod -v 0777 administrator/manifests/libraries
chmod -v 0777 administrator/manifests/packages
chmod -v 0777 administrator/modules
chmod -v 0777 administrator/templates
chmod -v 0777 components
chmod -v 0777 images
chmod -v 0777 images/banners
chmod -v 0777 images/sampledata
chmod -v 0777 language
chmod -v 0777 language/en-GB
chmod -v 0777 language/overrides
chmod -v 0777 libraries
chmod -v 0777 media
chmod -v 0777 modules
chmod -v 0777 plugins
chmod -v 0777 plugins/authentication
chmod -v 0777 plugins/captcha
chmod -v 0777 plugins/content
chmod -v 0777 plugins/editors
chmod -v 0777 plugins/editors-xtd
chmod -v 0777 plugins/extension
chmod -v 0777 plugins/finder
chmod -v 0777 plugins/quickicon
chmod -v 0777 plugins/search
chmod -v 0777 plugins/system
chmod -v 0777 plugins/user
chmod -v 0777 templates
chmod -v 0777 configuration.php
chmod -v 0777 cache
chmod -v 0777 administrator/cache
chmod -v 0777 logs
chmod -v 0777 tmp


reference
http://www.videosoftware.pro/forum/THREAD-Fix-Joomla-3-0-directory-permissions

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