1、编写脚本/root/bin/createuser.sh，实现如下功能：使用一个用户名做为参数，如果指定参数的用户存在，就显示其存在，否则添加之,并生成8位随机口令并存在一个文件中，初步提示改口令，显示添加的用户的id号等信息。
#!/bin/bash # ------------------------------------------ # Filename: cid.sh # Date: 2017-09-16 # Author: liuke # Description: 使用一个用户名做为参数，如果指定参数的用户存在，就显示其存在，否则添加之# 生成8位随机口令并存在一个文件中，初步提示改口令，显示添加的用户的id号等信息。 # ------------------------------------------- read -p "please input a username:" uname id $uname &> /dev/null e=$? if [ $e -eq 0 ] then echo "$uname is exist" exit 2 else useradd $uname echo `cat /dev/urandom | tr -d -c '[:alnum:][:punct:]' | head -c 10` > /app/mima passwd $uname id $uname fi unset uanme e
2、编写脚本/root/bin/yesorno.sh，提示用户输入yes或no,并判断用户输入的是yes还是no,或是其它信息
#!/bin/bash # ------------------------------------------ # Filename: yesno.sh # Revision: null # Date: 2017-09-10 # Author: liuke # Description: 提示用户输入yes或no,并判断用户输入的是yes还是no,或是其它信息 # ------------------------------------------- read -p "Yue ma?yes or no:" word word=`echo $word|tr "A-Z" "a-z"` case $word in yes|y) echo "yue" ;; no|n) echo "buyue" ;; *) echo "error input" esac
3、编写脚本/root/bin/filetype.sh,判断用户输入文件路径，显示其文件类型（普通，目录，链接，其它文件类型）
#!/bin/bash # ------------------------------------------ # Filename: filetype.sh # Date: 2017-09-11 # Author: liuke # Description: 判断用户输入文件路径，显示其文件类型 # ------------------------------------------- read -p "please input a file:" file if [ -f $file ];then echo "filetype is common file" elif [ -d $file ];then echo "filetype is directory" elif [ -h $file ];then echo "filetype is soft link" else echo "filetype is other" fi unset file
4、编写脚本/root/bin/checkint.sh,判断用户输入的参数是否为正整数
#!/bin/bash # ------------------------------------------ # Filename: checkint.sh # Date: 2017-09-11 # Author: liuke # Description: 判断用户输入的参数是否为正整数 # ------------------------------------------- read -p "please input a num:" num if [[ $num =~ ^[1-9][0-9]*$ ]];then echo "the num is a positive integer " else echo "wrong input" fi
5、判断/var/目录下所有文件的类型
#!/bin/bash # ------------------------------------------ # Filename: file-var.sh # Date: 2017-09-11 # Author: liuke # Description: 判断/var/目录下所有文件的类型 # ------------------------------------------ cd /var/;ls -1 | while read filename do if [ -f $filename ];then echo " $filename filetype is common file" elif [ -d $filename ];then echo "$filename filetype is directory" elif [ -h $filename ];then echo "$filename filetype is soft link" else echo "$filename filetype is other" fi done unset filename
6、添加10个用户user1-user10，密码为8位随机字符
#!/bin/bash
# ------------------------------------------
# Filename: 10user.sh
# Date: 2017-09-11
# Author: liuke
# Description: 添加10个用户user1-user10，密码为8位随机字符
# -------------------------------------------
for ((i=1;i<= 10;i+=1))
do
pw=`cat /dev/urandom |tr -d -c '[:alnum:][:punct:]'|head -c 8`
useradd user$i && echo $pw|passwd --stdin user$i &> /dev/null
echo -e "user:user$i;passwd:$pw"
done
# for i in {1..10};do userdel -r user$i;done 一次删除10个用户7、/etc/rc.d/rc3.d目录下分别有多个以K开头和以S开头的文件；分别读取每个文件，以K开头的输出为文件加stop，以S开头的输出为文件名加start，如K34filename stop S66filename start
#!/bin/bash # ------------------------------------------ # Filename: rc3.sh # Date: 2017-09-16 # Author: liuke # Description: 分别读取/etc/rc.d/rc3.d/每个文件，以K开头的输出为文件加stop，以S开头的输出为文件名加start # ------------------------------------------- for filename in `ls /etc/rc.d/rc3.d/`;do case $filename in K*) echo "$filename stop" ;; S*) echo "$filename start" esac done unset filename
8、编写脚本，提示输入正整数n的值，计算1+2+…+n的总和
#!/bin/bash # ------------------------------------------ # Filename: 1-nhe.sh # Date: 2017-09-11 # Author: liuke # Description: 提示输入正整数n的值，计算1+2+…+n的总和 # ------------------------------------------- read -p "please input a num:" num if [[ $num =~ ^[1-9][0-9]*$ ]];then sum=0 for ((i=1;i<= $num;i+=1)) do sum=$(($sum+$i)) done echo "1+2+…+n的总和为:$sum" fi unset num sum
9、计算100以内所有能被3整除的整数之和
#!/bin/bash # ------------------------------------------ # Filename: zhengchu3.sh # Date: 2017-09-11 # Author: liuke # Description: 计算100以内所有能被3整除的整数之和 # ------------------------------------------- sum=0 for ((i=3;i<= 100;i+=3)) do sum=$(($sum+$i)) done echo "100以内所有能被3整除的整数之和为:$sum" unset sum
10、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
# ------------------------------------------
# Filename: scanip11-2.sh
# Revision: null
# Date: 2017-09-10
# Author: liuke
# Description: 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。
# -------------------------------------------
> /app/ip.txt
read -p "please input a ip:" ip
echo $ip|egrep "(([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])"&> /dev/null
if [ $? -eq 0 ];then
id=`echo $ip|egrep -o ".*\."`
ping -c 1 -w 1 $ip &> /dev/null
echo "$ip is up">>/app/ip.txt
echo "$ip is down"
fi11、打印九九乘法表（for循环）
#!/bin/bash
# ------------------------------------------
# Filename: 9*9.sh
# Revision: null
# Date: 2017-09-10
# Author: liuke
# Description: 打印九九乘法表（for循环）
# -------------------------------------------
for i in {1..9};do
for j in `seq $i`;do
echo -en "${i}X${j}=$[$ix$j]\t"
done
echo
done12、打印九九乘法表（while循环）
#!/bin/bash
# ------------------------------------------
# Filename: 9*9while.sh
# Date: 2017-09-11
# Author: liuke
# Description: 打印九九乘法表(while)
# -------------------------------------------
while ((i<10,j<9))
do
echo -en "${i}X${j}=$[$i*$j|bc]\t"
done
echo13、在/testdir目录下创建10个html文件,文件名格式为数字N（从1到10）加随机8个字母，如：1AbCdeFgH.html。
#!/bin/bash
# ------------------------------------------
# Filename: 10user.sh
# Date: 2017-09-11
# Author: liuke
# Description: 添加10个用户user1-user10，密码为8位随机字符
# -------------------------------------------
for ((i=1;i<= 10;i+=1))
do
pw=`cat /dev/urandom |tr -d -c '[:alnum:][:punct:]'|head -c 8`
useradd user$i && echo $pw|passwd --stdin user$i &> /dev/null
echo -e "user:user$i;passwd:$pw"
done
# for i in {1..10};do userdel -r user$i;done 一次删除10个用户14、编写脚本，求100以内所有正奇数之和
#!/bin/bash # ------------------------------------------ # Filename: jishuhe.sh # Date: 2017-09-11 # Author: liuke # Description: 编写脚本，求100以内所有正奇数之和 # ------------------------------------------- sum=0;i=1 while ((i<100)) do sum=$[$sum + $i] let i=$[$i+2] done echo "100以内所有正奇数之和为:$sum"
15、编写脚本，利用变量RANDOM生成10个随机数字，输出这个10数字，并显示其中的最大值和最小值。
#!/bin/bash # ------------------------------------------ # Filename: random10-2.sh # Date: 2017-09-16 # Author: liuke # Description: 利用变量RANDOM生成10个随机数字，输出这个10数字，并显示其中的最大值和最小值 # while # ------------------------------------------- i=1 while [ $i -lt 11 ];do sum=`echo $[RANDOM]` echo -e "$sum" "\c" if [ $i -le 1 ];then max=$sum min=$sum elif [[ $sum -gt $max ]];then max=$sum elif [[ $sum -lt $min ]];then min=$sum fi let i+=1 done echo echo "the number max is:$max;min number is:$min"
16、编写脚本，编辑菜单，用户输入菜单列表中的某个数字，显示相应价格。
#!/bin/bash # ------------------------------------------ # Filename: caidan.sh # Date: 2017-09-10 # Author: liuke # Description: 编辑菜单，用户输入菜单列表中的某个数字，显示相应价格。 # ------------------------------------------- echo "1=yangroutang 2=mifan 3=hulatang 4=jiaozi 5=lamian 6=huimian" read -p "please input your choose num:" num case $num in 1|4) echo "the price is 20￥" ;; 2|5) echo "the price is 12￥" ;; 3|6) echo "the price is 10￥" ;; *) echo "error choose" esac
17、编写脚本，实现打印国际象棋棋盘
#!/bin/bash # ------------------------------------------ # Filename: chess11.sh # Date: 2017-09-11 # Author: liuke # Description: 棋盘 # ------------------------------------------- for ((i=1;i<=8;i++));do for ((j=1;j<=8;j++));do total=$(($i+$j)) tmp=$(($total % 2)) if [ $tmp -eq 0 ] then echo -e -n "\033[43m \033[0m" else echo -e -n "\033[41m \033[0m" fi done echo done