1、判断用户输入的数字是否为正整数。
#!/bin/bash
#判断用户输入的参数是否为正整数
read -p "Please input a digit:" int
if [[ "$int" =~ (^[0-9]*[1-9][0-9]*$) ]];then
echo "this digit is positive integer"
else
echo "this digit is not positive integer"
fi
~
2、判断/var/目录下的所有文件类型。
#!/bin/bash
for f in /var/* ;do
if [ -L $f ];then
echo "$f is linkfile"
elif [ -f $f ];then
echo "$f is commom fole"
elif [ -d $f ];then
echo "$f is directory"
else
echo "$f is other files"
fi
done
3、计算100以内所有能被3整除的整数之和。
#!/bin/bash
sum=0
for i in {1..100};do
yu=$[i%3]
if [ "$yu" -eq 0 ];then
let sum+=i
fi
done
echo $sum
~
4、
编写脚本，提示请输入网络地址，如192.168.0.0，判断输入的网段中主机在线状态。
#!/bin/bash
> /app/ipv4.log
read -p "Please input the network(eg:192.168.1.0):" network
[[ "$network" =~ ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$ ]] || { echo "Please input a legal IP" ; exit 1; }
net=`echo $network | cut -d. -f1-3`
for i in {1..14};do
{
if ping -c1 -w1 $net.$i &>/dev/null;then
echo $net.$i is up |tee -a /app/ipv4.log
else
echo $net.$i is down
fi
}&
done
wait
5、九九乘法表
#!/bin/bash
for i in {1..9};do
for j in `seq 1 $i`;do
echo -e "${j}x${i}=$[j*i]\t\c"
done
echo
done
6、
在/testdir目录下创建10个html文件,文件名格式为数字N（从1到10）加随机8个字母，如：1AbCdeFgH.html
#!/bin/bash
for i in {1..3};do
j=`openssl rand -base64 1000 |tr -dc '[alpha]' |head -c8`
touch /app/$i$j.html
done
7、打印等腰三角形
#!/bin/bash
read -p "Please input number:" line
for i in `seq $line`;do
space=`echo $[$line-$i]`
for j in `seq $space`;do
echo -n ' '
done
for k in `seq $[$i*2-1]`;do
echo -n '*'
done
echo
done