shell脚本安装python、pip-----非交互式的--批量执行函数

首先把pip-18.0.tar.gz 、Python-3.6..tgz 安装包放在 /usr/local 下面，按照顺序先安装pip，再安装python。不要先安装或只安装python，否则很容易出错，

cat >>pip-python.sh<<EOF

#!/bin/bash

func1(){

    yum -y groupinstall "Development tools"

    [ $? -eq  ] && yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

}

func2(){

    yum remove pip -y && cd /usr/local/ && tar -xf pip-18.0.tar.gz && cd pip-18.0/ && python setup.py install

    [ $? -eq  ] && echo "安装完成pip"

}

func3(){

    cd /usr/local/ && tar -zxvf Python-3.6..tgz && mv Python-3.6. python3 && cd python3 && ./configure && make && make install

    [ $? -eq  ] && mv /usr/bin/python /usr/bin/python.bak

    [ $? -eq  ] && ln -s /usr/local/bin/python3 /usr/bin/python && ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

    [ $? -eq  ] && whereis pip && /usr/local/bin/pip3. install --upgrade pip && /usr/local/bin/pip install paramiko

    [ $? -eq  ] && sed -i "1c #!/usr/bin/python2.7" /usr/bin/yum

    [ $? -eq  ] && sed -i "1c #!/usr/bin/python2.7" /usr/libexec/urlgrabber-ext-down

    [ $? -eq  ] && sed -i "1c #!/usr/bin/python2.7" /usr/sbin/firewalld

    [ $? -eq  ] && sed -i "1c #!/usr/bin/python2.7" /usr/sbin/firewalld

    [ $? -eq  ] && systemctl restart firewalld

    [ $? -eq  ] && echo "安装完成python"

}

#程序开始

while true

do

    echo "安装依赖包"

    [ $? -eq  ] && func1

    [ $? -eq  ] && echo "安装pip"

    [ $? -eq  ] && func2

    [ $? -eq  ] && echo "安装python"

    [ $? -eq  ] && func3

    [ $? -eq  ] && echo "全部安装完毕"

    exit

done

EOF

上面每个函数里面可以嵌套 while true循环，这样每个函数里面每一步就不用判断执行结果了