CentOS

the problem my command not working in centos 7 working in centos 6

i need to change the command centos6 to centos 7 that what i need
i want to use centos 7 but i want t ochange command centos 6 to centos 7

Hello guys have any idea how can i change command linux centos 6 to centos 7 , i have own app working on serve centos 6 but now i want t ochange the command to centos 6 thank you first command Centos 6 i want to change the command to centos 7 : yum groupinstall 'base' yum groupinstall 'web server' y...