亚洲在线久爱草,狠狠天天香蕉网,天天搞日日干久草,伊人亚洲日本欧美

批量添加指定數量的用戶實例

#!/bin/bash?

cd /root/test?

ls *.tar.gz > ls.log(>覆蓋)?

ls *.tgz >> ls.log(>>追加)?

for i in $(cat ls.log)?

????do?

????????tar -zxvf $i &> /dev/null?

????done?

rm -rf ls.log

多分支語句case語句

#!/bin/bash?

read -t 30 -p "Please input a file name:" file?

if [ -z "$file" ]?

????then?

????????echo "Error, please input a file name!"?

????????exit 11?

elif [ ! -e "$file" ]?

????then?

????????echo "Your input is not a file name!"?

????????exit 22?

elif [ -f "$file" ]?

????then?

????????echo "$file is a regular file!"?

elif [ -d "$file" ]?

????then?

????????echo "$file is a directory !"?

else?

????echo "$file is another file!"?

fi

#!/bin/bash?

read -t 30 -p "Please input num1:" num1?

read -t 30 -p "Please input num2:" num2?

read -t 30 -p "Please input operator:" ope?

if [ -n "$num1" -a -n "$num2" -a -n "$ope" ]?

????then?

????????test1=$(echo $num1 | sed 's/[0-9]//g')?

????????test2=$(echo $num2 | sed 's/[0-9]//g')?

????????????if [ -z "$test1" -a -z "$test2" ]?

????????????????then?

????????????????????if [ "$ope" == '+' ]?

????????????????????????then?

????????????????????????????result=$(($num1+$num2))?

????????????????????elif [ "$ope" == '-' ]?

????????????????????????then?

????????????????????????????result=$(($num1-$num2))?

????????????????????elif [ "$ope" == '/' ]?

????????????????????????then?

????????????????????????????result=$(($num1 / $num2))?

????????????????????elif [ "$ope" == '*' ]?

????????????????????????then?

????????????????????????????result=$(($num1*num2))?

? ? ? ? ? ? ? ? ? ? else?

? ? ? ? ? ? ? ? ? ? ? ? echo "Error: the input operator is worng, please input +-*/"?

? ? ? ? ? ? ? ? ? ? ? ? exit 111?

????????????????????fi?

????????????????else?

????????????????????echo "Error: Please input numbers!"??

?????????????????? ?exit 222?

????????????????fi?

????????echo "$num1 $ope $num2 is $result"?

????else?

????????echo "Error: You input null value!"?

????????exit 333?

fi

#!/bin/bash

test=$(ps aux | grep "httpd" | grep -v "grep")

if [ -n "$test" ]

????then

????????echo "httpd is on"

????else

????????echo "httpd is off"

????????/etc/rc.d/init.d/httpd start

fi

#!/bin/bash

read -t 30 -p "please input a dir:" dir

if [ -d "dir" ]

????then

????????echo "yes"

????else

????????echo "no"

fi

#!/bin/bash

rate=$(df -h | grep "/dev/sda1" | cut -d "%" -f 1)

if [ "$rate" -ge "80" ]

????then

????????echo "/dev/sda1 is full"

fi

#!/bin/bash

test=$(env | grep "USER" | cut -d "=" -f 2)

if [ "$test" == "root" ]

????then

????????echo "Current user id root."

fi

多重條件判斷

字符串的判斷

兩個整數之間的比較

兩個文件之間的比較

按文件權限判斷

兩種判斷格式

test -e /root/abc

[ -e /root/abc ]