学习shell scripts
实操
which sh 查看sh位置
ll /bin/sh
shell格式
第1个scripts：输出hello world
实操
vi sh01.sh
#!/bin/bash
#Program:
# this scripts is used to print hello world
#History:2020-03-31 Jack 1.0.0
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
echo "hello world"
exit 0
sh sh01.sh
或 ./sh01.sh
echo $?
注：若sh脚本没有可执行权限，执行chmod u+x sh01.sh 给脚本文件赋权
第2个scripts：使用read，输出所输入数据
实操
vi sh02.sh
#!/bin/bash
#Program: this program is used to print your input
#History:22020-03-31 linc 1.0.0
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
read -p "请输入你的姓：" xing
read -p "请输入你的辈分：" bei
read -p "请输入你的名：" ming
echo "your name is : $xing $bei $ming"
sh sh02.sh
第3个scripts：使用所输入文件名建立文件
实操
vi sh03.sh
#!/bin/bash
#Program: this scripts is used to input name to cread file or dir
#History:2020-03-31 jack 1.0.0
PATH=/bin:/sbin:/usr/bin:usr/sbin:/usr/local/bin:/usr/local/sbin
export PATH
read -p "please input a file name:" filename
file1="$filename""one"
file2="$filename""two"
dir="$filename""three"
touch $file1
touch $file2
mkdir $dir
sh sh03.sh
第4个scripts：计算数值
实操
vi sh04.sh
#!/bin/bash
#program:this scripts is used to add * - two number
#History:2020-03-31 1.0.0
PATH=/bin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
export PATH
read -p "please input your first number:" firnu
read -p "please input your second number:" secnu
total=$(($firnu*secnu))
echo "$firnu * $secnu= $total"
sh sh04.sh