This is my install.sh

#!  /bin/sh
 
 Nginx, php, mysql Integrated Environment on # linux
 # Author salamander
 
 basepath=$(cd `dirname $0`;  pwd)
 
 Nginx installation
 
 yum install -y gcc gcc-c++
 
 # pcre installation
 tar -zxvf  pcre-8.40.tar.gz
 cd ./pcre-8.40
 ./configure --prefix=/usr/local/pcre-8.40
 make
 make install
 
 cd $basepath
 
 # zlib installation
 tar -zxvf  zlib-1.2.11.tar.gz
 cd ./zlib-1.2.11
 ./configure --prefix=/usr/local/zlib-1.2.11
 make
 make install
 
 cd $basepath
 
 # openssl installation, note openssl is. /config
 tar -zxvf  openssl-1.1.0e.tar.gz
 cd ./openssl-1.1.0e
 ./config
 make
 make install
 
 cd $basepath
 
 # nginx installation note-with-pcre =-with-zlib refers to the source path
 tar -zxvf  nginx-1.10.3.tar.gz
 cd ./nginx-1.10.3
 ./configure --prefix=/usr/local/nginx-1.10.3 --with-pcre=./../pcre-8.40  --with-zlib=./../zlib-1.2.11
 make
 make install
 
 echo 'Nginx installed successfully!'

The last sentence will appear no matter whether it is correct or wrong. This is not good. How can we solve it?