Shell编程之if语法练习（LNMP）全过程 Theletter

大家好，我是延凯，本人原来在CSDN写作已经快一年了 都是相关Linux运维这方面的技术知识，现在搬到博客园也是我一直想的，本博客主要写Python，docker，shell等偏向开发云计算等知识点，谢谢各位，声明：（原先的CSDN也会不定时更新Linux运维等方面的知识！）

#!/bin/bash  
# DATE：Wed Jan 17 1# ywyankerp@163.com  
#this is a yankerp  
  
# The Nginx service is being installed  
ROOT_ID=0  
ML=/usr/local/src  
NGINX_ML=/usr/local/src/nginx-1.12.2  
PML=/usr/local/src/php-5.6.27  
QD=`netstat -anpt | grep 80 | awk '{print $7}' | cut -d "/" -f2 | cut -d ":" -f1`  
ADDR=`ip a | grep eno16777728$ | awk '{print $2}' | cut -d "/" -f1`  
MMM=`netstat -anput | grep mysqld | awk '{print $4}' | cut -d ":" -f4`  
MAR=`rpm -qa | grep mariadb`  
cd $ML && {  
wget http://mirrors.aliyun.com/repo/Centos-7.repo &> /dev/null  
mv Centos-7.repo /etc/yum.repos.d/Centos-Base.repo  
yum clean all &> /dev/null  
yum makecache &> /dev/null  
}  
  
if [ $? -eq 0 ]  
    then  
        echo "Yum源更新完毕,开始安装！！！"  
    else  
        echo "Yum源error"  
        exit 1  
fi  
echo "Yum源配置成功"  
  
if [ "$UID" -eq "$ROOT_ID" ]  
        then  
               echo "root用户运行中" && systemctl stop firewalld && yum install -y gcc gcc-c++  pcre-devel zlib-devel openssl-devel &> /dev/null  
        else  
               echo "请使用Root用户运行"  
               exit 1  
fi  
echo "依赖包安装完成！"  
cd $ML || {  
        echo "进入目录失败！！！"  
        exit 1  
}  
  
wget http://nginx.org/download/nginx-1.12.2.tar.gz &> /dev/null && {  
tar zxf nginx-1.12.2.tar.gz && groupadd www && useradd -g www www -s /sbin/nologin  
}  
echo "Nginx包下载成功"  
cd $NGINX_ML && {  
    ./configure --prefix=/usr/local/nginx --with-http_dav_module --with-http_stub_status_module --with-http_addition_module --with-http_sub_module --with-http_flv_module --with-http_mp4_module --with-http_ssl_module --with-http_gzip_static_module --user=www --group=www &> /dev/null && make &> /dev/null && make install &> /dev/null   
}  
  
if [ $? -eq "0" ]  
        then  
               ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin ;nginx && echo "Nginx启动成功，请访问http://$ADDR:80"  
        else  
               echo "Nginx启动失败！！！"  
               exit 1  
fi  
  
  
#Start installing MySQL5.7！  
echo "开始下载MySQL二进制安装包，请稍等..."  
if [ -z "$MAR" ]  
                then  
                        echo "开始安装MySQL"  
fi  
if [ -n "$MAR" ]  
                then  
                        rpm -e mariadb-libs --nodeps && echo "卸载mariadb成功！正式安装MySQL"  
fi  
  
cd $ML || {  
    echo "进入目录失败！！！"  
    exit 1  
}  
  
wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz &> /dev/null && {  
tar zxf mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz  && mv mysql-5.7.18-linux-glibc2.5-x86_64 /usr/local/mysql  
cd /usr/local/mysql/ && mkdir data && mkdir log && echo "export PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile  
source /etc/profile && groupadd mysql && useradd -r -g mysql -s /bin/false mysql  
}  
  
cat << EOF >/etc/my.cnf  
[client]    
socket=/usr/local/mysql/mysql.sock    
[mysqld]    
basedir=/usr/local/mysql    
datadir=/usr/local/mysql/data    
pid-file=/usr/local/mysql/data/mysqld.pid    
socket=/usr/local/mysql/mysql.sock    
log_error=/usr/local/mysql/log/mysql.err  
EOF  
  
if [ ! -d /etc/my.cnf ]  
                then  
                        chmod 750 data/ && chown -R mysql . && chgrp -R mysql . && bin/mysqld --initialize --user=mysql && cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld && service mysqld start &> /dev/null  
                else  
                         echo "错误！！！"  
fi  
if [ $? -eq "0" ]  
    then  
        echo "MySQL正式安装完成杀青！"  
    else  
        echo "MySQL安装失败！！！"  
        exit 1  
fi  
  
#PHP install sccessy  
yum -y install libxml2-devel libcurl-devel openssl-devel bzip2-devel &> /dev/null  
if [ $? -eq 0 ]  
        then  
                echo "依赖包安装成功！！！"  
        else  
                echo "依赖包安装失败！！！"  
fi  
  
cd $ML || {  
        echo "进入目录失败！！！"  
        exit 1  
}  
  
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/libmcrypt/libmcrypt-2.5.7.tar.gz &> /dev/null  && {  
tar zxf libmcrypt-2.5.7.tar.gz && cd libmcrypt-2.5.7/ && ./configure --prefix=/usr/local/libmcrypt &> /dev/null && make &> /dev/null && make install &> /dev/null  
}  
  
if [ $? -eq 0 ]  
        then  
                echo "Libmcrypt安装成功！"  
        else  
                echo "Libmcrypt-ERROR!"  
        exit 1  
fi  
# PHP install  
cd $ML || {  
        echo "进入目录失败！！！"  
        exit 1  
}  
wget http://cn2.php.net/distributions/php-5.6.27.tar.gz &> /dev/null && {  
tar zxf php-5.6.27.tar.gz && cd php-5.6.27/ &&  ./configure --prefix=/usr/local/php5.6 --with-mysql=mysqlnd --with-pdo-mysql=mysqlnd --with-mysqli=mysqlnd --with-openssl --enable-fpm --enable-sockets --enable-sysvshm --enable-mbstring --with-freetype-dir --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --with-mhash --with-mcrypt=/usr/local/libmcrypt --with-config-file-path=/etc --with-config-file-scan-dir=/etc/php.d --with-bz2 --enable-maintainer-zts  &> /dev/null  
}  
if [ $? -eq 0 ]  
            then  
                 make &> /dev/null  && make install &> /dev/null  &&  echo "PHP编译安装成功,正在配置请稍等...."  
            else  
                 echo "PHP安装失败"  
fi  
  
cd $PML || {  
                echo "进入目录失败！！！"  
                exit 1  
}  
cp php.ini-production /etc/php.ini && {  
cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm && chmod +x /etc/init.d/php-fpm && chkconfig --add php-fpm && chkconfig php-fpm on  
}  
  
if [ $? -eq 0 ]  
                        then  
                                cp /usr/local/php5.6/etc/php-fpm.conf.default /usr/local/php5.6/etc/php-fpm.conf && echo "复制主配置成功"  
                        else  
                                echo "PHP权限失败，请重试！"  
fi  
  
if [ ! -d /usr/local/php5.6/etc/php-fpm.conf ]  
        then  
                sed -i 's#;pid = run/php-fpm.pid#pid = run/php-fpm.pid#g' /usr/local/php5.6/etc/php-fpm.conf  
                sed -i 's/listen = 127.0.0.1:9000/listen = 127.0.0.1:9000/g' /usr/local/php5.6/etc/php-fpm.conf  
                sed -i 's/pm.max_children = 5/pm.max_children = 300/g' /usr/local/php5.6/etc/php-fpm.conf  
                sed -i 's/pm.start_servers = 2/pm.start_servers = 20/g' /usr/local/php5.6/etc/php-fpm.conf  
                sed -i 's/pm.min_spare_servers = 1/pm.min_spare_servers = 20/g' /usr/local/php5.6/etc/php-fpm.conf  
                sed -i 's/pm.max_spare_servers = 3/pm.max_spare_servers = 100/g' /usr/local/php5.6/etc/php-fpm.conf  
        else  
                echo "NONONO"  
fi  
if [ $? -eq 0 ]  
                        then  
                                systemctl start php-fpm && echo "PHP启动成功"  
                        else  
                                echo "启动PHP失败"  
fi  
  
#配置nginx解析php  
if [ ! -d /usr/local/nginx/conf/nginx.conf ]  
        then  
               sed -i 's/index  index.html index.htm;/index  index.php index.html index.htm;/g' /usr/local/nginx/conf/nginx.conf  
               sed -i 's/#    root           html;/    root           html;/g' /usr/local/nginx/conf/nginx.conf  
               sed -i 's/#    fastcgi_pass   127.0.0.1:9000;/    fastcgi_pass   127.0.0.1:9000;/g' /usr/local/nginx/conf/nginx.conf  
               sed -i 's/#    fastcgi_index  index.php;/    fastcgi_index  index.php;/g' /usr/local/nginx/conf/nginx.conf  
               sed -i 's*#    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;*    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;*g' /usr/local/nginx/conf/nginx.conf  
               sed -i 's/#    include        fastcgi_params;/    include        fastcgi.conf;/g' /usr/local/nginx/conf/nginx.conf  
               sed -i '71d' /usr/local/nginx/conf/nginx.conf && sed -i 'N;70a}' /usr/local/nginx/conf/nginx.conf  
               sed -i '65d' /usr/local/nginx/conf/nginx.conf && sed -i 'N;64alocation ~ \\.php$ {' /usr/local/nginx/conf/nginx.conf  
        else  
               echo "解析PHP失败！！！"  
fi  
  
touch /usr/local/nginx/html/yankerp.php  
cat << EOF >/usr/local/nginx/html/yankerp.php  
<?php  
phpinfo();  
?>  
EOF  
  
if [ ! -d /usr/local/nginx/html/yankerp.php ]  
    then  
        nginx -s reload && systemctl restart php-fpm  
    else  
        echo "测试目录文件失败"  
fi  
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo  &> /dev/null && yum install -y sl &> /dev/null  
sl  
if [ $? -eq 0 ]  
        then  
                echo "LNMP安装成功，请您访问http://$ADDR/yankerp.php"  
        else  
                echo "安装失败"  
fi  
  
if [ $? -eq 0 ]  
    then  
        echo "LNMP安装成功，请您访问http://$ADDR/yankerp.php"  
    else  
        echo "安装失败"  
fi  
###################################################################################################This is a yankerp~ 

 

以上使用的过程都是一些if的判断，这样的练习能够熟练掌握shell的if语句的作用，以及对if语句有一些清晰的了解，希望读者能够自己也去写个shell脚本 尤其是刚接触if语句的朋友么，这样才能够提高自己的shell知识，同时也可以掌握shell之if语句的语法以及作用，如果完全可以看懂以上脚本的朋友么 那么恭喜你，你以及对if语句有一些认识了

　　　　再见！