1、编写函数,实现打印绿色OK和红色FAILED
判断是否有参数,存在为Ok,不存在为FAILED
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 06:26
# * Filename : question1.sh
#! /bin/bash
function_1() {
if [ $# -ne 0 ];then
echo -e "\033[32m ok \033[0m"
else
echo -e "\033[31m failed \033[0m"
fi
}
function_1 $*
2、编写函数,实现判断是否无位置参数,如无参数,提示错误
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 06:26
# * Filename : question2.sh
#! /bin/bash
function_1() {
if [ $# -ne 0 ];then
echo $*
else
echo -e "no arguments.error"
fi
}
function_1 $*
3、编写函数实现两个数字做为参数,返回最大值
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 06:59
# * Filename : question3.sh
# * Description :
# **********************************************************
fun(){
read -p "Please enter then first digit: " num1
read -p "Please enter then second digit: " num2
if [ -z $num1 ];then
echo "please enter number1"
exit 9
fi
if [ -z $num2 ];then
echo "please enter number2"
exit 9
fi
echo $num1$num2 | egrep -e ^[0-9]+$ &>/dev/null
state=$?
if [ $state -eq 0 ];then
max=$num1
for i in $num1 $num2
do
if [ $max -lt $i ];then
max=$i
fi
done
echo $max
else
echo "please enter the number"
fi
}
fun
4、编写函数,实现两个整数位参数,计算加减乘除。
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 07:27
# * Filename : question4.sh
# * Description :
# **********************************************************
fun(){
echo "$1+$2=$(($1+$2))"
echo "$1-$2=`let r=$1-$2;echo $r`"
echo "$1*$2=$(($1*$2))"
echo "$1/$2=$(($1/$2))"
echo "$1%$2=$(($1%$2))"
}
fun $1 $2
5、将/etc/shadow文件的每一行作为元数赋值给数组
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 07:35
# * Filename : question5.sh
# * Description :
# **********************************************************
file=/etc/shadow
num=`wc -l < $file`
for i in `seq $num`
do
arr[$i]=`head -$i $file | tail -1`
done
for i in ${arr[*]}
do
echo $i
done
6、使用关联数组统计文件/etc/passwd中用户使用的不同类型shell的数量
#!/bin/bash
# **********************************************************
# * Author : jiangzhier
# * Email : ???
# * Create time : 2023-01-03 07:47
# * Filename : question6.sh
# * Description :
# **********************************************************
declare -A arr
while read line
do
type=`echo $line | cut -d : -f 7`
let arr[$type]++
done < /etc/passwd
for i in ${!arr[*]}
do
echo "$i 的数量为 ${arr[$i]}"
done
7、使用关联数组按扩展名统计指定目录中文件的数量