linux make时提示Command not found

下载这个软件(

GitHub - fredgrose/Ed4_LaRC_FuLiou: Edition 4 version of LaRC FuuLiou Broadband Correlated K Sw & Lw Radiative Transfer code Edition 4 version of LaRC FuuLiou Broadband Correlated K Sw & Lw Radiative Transfer code - GitHub - fredgrose/Ed4_LaRC_FuLiou: Edition 4 version of LaRC FuuLiou Broadband Correlated K Sw & Lw Radiative Transfer code https://github.com/fredgrose/Ed4_LaRC_FuLiou

安装步骤如下

Once you have downloaded the Fuliou distribution..

1) Uncompress using      : gunzip Ed4_LaRC_FuLiou20150106.tar.gz
2) Untar using           : tar -xvf Ed4_LaRC_FuLiou20150106.tar
3) Change directory into : Ed4_LaRC_FuLiou
4) Set up local environment variables to compile F90 and F77 source code.

An "example" on a unix computer with a gfortran compiler would be..

 setenv F90COMP " -O2 -c "
 setenv FCOMP " -O2 -c"
 setenv F90 /usr/local/bin/gfortran
 setenv F77 /usr/local/bin/gfortran

5) Familiarize yourself with the directory structure
 
** The radiative transfer F90 source code is under ./lib/src
 Once the make file is run an object library is created as ./lib/libEd3Fu_201212.a**
 F90 .mod files are created under ./lib/mod
 An example code to show how to setup inputs is under ./src/simple/simple.f90 
 Example inputs of standard atmosphere temperature and humidity ./testatms

在./lib/src 下执行make的时候
提示错误如下：
extras.f90
make: extras.f90: Command not found
make: *** [Makefile:75: extras.o] Error 127

请问这该如何解决啊？

你没有安装make，需要先安装才能用make命令

进了执行目录了否 ？