chmod Joomla 2.5
āļĢāļēāļĒāļāļēāļĢāļ•āļąāđ‰āļ‡āļ„āđˆāļē Permission āļŦāļĢāļ·āļ­ chmod āļŠāļģāļŦāļĢāļąāļš Directory / Path āđƒāļŦāđ‰āļāļąāļš Joomla 2.5
 

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 images/stories
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/smartsearch
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-directory-permissions

āđ„āļ­āđ€āļĢāļĩāļĒāļĨāļĨāļĩāđˆāđ‚āļŪāļŠ
āļŠāļģāļŦāļĢāļąāļšāļāļēāļĢāļŠāļ™āļąāļšāļŠāļ™āļļāļ™ āđāļĨāļ°āļŠāđˆāļ§āļĒāđ€āļŦāļĨāļ·āļ­
http://www.ireallyhost.com/support
āļ‚āđ‰āļ­āļāļģāļŦāļ™āļ”āđƒāļ™āļāļēāļĢāđ€āļœāļĒāđāļžāļĢāđˆāļšāļ—āļ„āļ§āļēāļĄ āļ‚āđˆāļēāļ§āļŠāļēāļĢ
** āļšāļ—āļ„āļ§āļēāļĄāļ™āļĩāđ‰āļĄāļĩāļĨāļīāļ‚āļŠāļīāļ—āļ˜āļīāđŒ āđ„āļĄāđˆāļ­āļ™āļļāļāļēāļ•āļīāđƒāļŦāđ‰āļ„āļąāļ”āļĨāļ­āļ āļ—āļģāļ‹āđ‰āļģ āļ”āļąāļ”āđāļ›āļĨāļ‡āļāđˆāļ­āļ™āđ„āļ”āđ‰āļĢāļąāļšāļ­āļ™āļļāļāļēāļ• **
āđ‚āļ›āļĢāļ”āļĢāļ°āļšāļļāđāļŦāļĨāđˆāļ‡āļ—āļĩāđˆāļĄāļē āļšāļĢāļīāļĐāļąāļ— āđ€āļ­āđ‡āļāļ‹āđŒāļ•āļĢāđ‰āļē āļ„āļ­āļĢāđŒāļ›āļ­āđ€āļĢāļŠāļąāđˆāļ™ āļˆāļģāļāļąāļ” / https://www.ireallyhost.com