falha para instalar o cakephp

Galera fiz upload do cakephp sem mudar nada... e ele apresenta um error q n consigo resolver

ele apresenta esse error

Warning: _cake_core_ cache was unable to write 'cake_dev_en-us' to File cache in /var/www/html/cake/lib/Cake/Cache/Cache.php on line 325 Warning: /var/www/html/cake/app/tmp/cache/persistent/ is not writable in /var/www/html/cake/lib/Cake/Cache/Engine/FileEngine.php on line 380 Fatal error: Uncaught exception 'CacheException' with message 'Cache engine _cake_core_ is not properly configured.' in /var/www/html/cake/lib/Cake/Cache/Cache.php:181 Stack trace: #0 /var/www/html/cake/lib/Cake/Cache/Cache.php(151): Cache::_buildEngine('_cake_core_') #1 /var/www/html/cake/app/Config/core.php(367): Cache::config('_cake_core_', Array) #2 /var/www/html/cake/lib/Cake/Core/Configure.php(72): include('/var/www/html/c...') #3 /var/www/html/cake/lib/Cake/bootstrap.php(177): Configure::bootstrap(true) #4 /var/www/html/cake/app/webroot/index.php(96): include('/var/www/html/c...') #5 /var/www/html/cake/index.php(43): require('/var/www/html/c...') #6 {main} thrown in /var/www/html/cake/lib/Cake/Cache/Cache.php on line 181
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