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root@zhangtong:~# sudo apt-get install apache2 php5 php5-gd php5-mysqlnd mysql-serversudo: unable to resolve host zhangtongReading package lists... DoneBuilding dependency tree Reading state information... DonePackage php5 is not available, but is referred to by another package.This may mean that the package is missing, has been obsoleted, oris only available from another sourcePackage php5-gd is not available, but is referred to by another package.This may mean that the package is missing, has been obsoleted, oris only available from another sourceE: Package 'php5' has no installation candidateE: Package 'php5-gd' has no installation candidateE: Unable to locate package php5-mysqlnd你们阿里自己的程序安装这些包有问题啊，资源貌似是失效了