ubuntu:~/eosio.cdt$ ./build.sh bash: ./build.sh: No such file or directory

[Changes2018]

trafficstars

I am trying to install a build file but i am getting an error message nrt18@ubuntu:~/eosio.cdt$ ./build.sh bash: ./build.sh: No such file or directory i have followed all the steps as shown on the help page but still note able to build.