bash腳本進階練習題
[ $# -lt 1 ] && echo "input username !" && exit
id $1 &> /dev/null
if [ $? -eq 1 ];then
useradd $1 ;echo -e "successful\n`id $1`"
else echo "user already exists"
fi
2、編寫腳本/root/bin/yesorno.sh，提示用戶輸入yes或no,並判斷用戶輸入的是yes還是no,或是其它信息
read -p "yes or no " answer
if [[ $answer =~ ^[Yy]([Ee][Ss])?$ ]];then
echo "your anwser is yes"
elif [[ $answer =~ ^[Nn][Oo]?$ ]];then
echo "your anwer is no"
else
echo "other"
fi
3、編寫腳本/root/bin/filetype.sh,判斷用戶輸入文件路徑，顯示其文件類型（普通，目錄，鏈接，其它文件類型）
[ $# -ne 1 ] && echo "input file path"&&exit 1
if [ -d $1 ] ;then
echo dir
elif [ -h $1 ] ;then
echo link
elif [ -f $1 ] ;then
echo file
elif [ ! -e $1 ] ;then
echo not exist
else echo other
fi
4、編寫腳本/root/bin/checkint.sh,判斷用戶輸入的參數是否為正整數
read -p "input positive integer " num
if [[ $num =~ ^[1-9][0-9]*$ ]] ;then
echo right
else
echo "error"
fi
1、判斷/var/目錄下所有文件的類型
for i in `ls -A /var/` ; do
echo "$i -- `filetype15.sh /var/$i`"
done
2、添加10個用戶user1-user10，密碼為8位隨機字符
> ./user.log
for i in {1..10} ;do
useradd user$i
mima=`openssl rand -base64 10|head -c8`
echo $mima|passwd --stdin user$i
echo "user$i $mima" >>./user.log
done
3、/etc/rc.d/rc3.d目錄下分別有多個以K開頭和以S開頭的文件；分別讀取每個文件，以K開頭的輸出為文件加stop，以S開頭的輸出為文件名加start，如K34filename stop S66filename start
for i in `ls /etc/rc.d/rc3.d` ;do
if [[ $i =~ ^K.*$ ]];then
echo "$i start"
elif [[ $i =~ ^S.*$ ]];then
echo "$i stop"
fi
done
4、編寫腳本，提示輸入正整數n的值，計算1+2+…+n的總和
read -p "input a number " i
if [[ $i =~ [1-9][0-9]* ]];then
for j in `seq $i`;do
let sum+=j
done
echo $sum
else
echo error
fi
5、計算100以內所有能被3整除的整數之和
for i in `seq 100`;do
let sum=i%3
if [ $sum -eq 0 ];then
let add=add+$i
fi
done
echo $add
6、編寫腳本，提示請輸入網絡地址，如192.168.0.0，判斷輸入的網段中主機在線狀態
read -p "input ipv4 address " ip
if [[ $ip =~ ^(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$ ]] ;then
nip=`echo $ip|cut -d. -f1-3`
for i in {1..254};do
ping -w1 -c1 $nip.$i &>/dev/null && echo "$nip.$i is up"|| echo "$nip.$i is down"&
done
wait
else
echo "error"
fi
7、打印九九乘法表
for i in `seq 9`;do
for j in `seq $i`;do
let k=$i*$j
echo -e "$j*$i=$k \c"
done
echo
done
8、在/testdir目錄下創建10個html文件,文件名格式為數字N（從1到10）加隨機8個字母，如：1AbCdeFgH.html
for i in `seq 10`;do
num=`cat /dev/urandom |tr -dc "[:alpha:]"|head -c8`
mkdir /app/$i$num.html
done
9、打印等腰三角形
read -p "input mun " t
if [[ $t =~ ^[1-9][0-9]*$ ]];then
for n in `seq $t`;do
let kmun=$t-$n
let smun=2*$n-1
for i in `seq $kmun`;do
echo -e " \c"
done
for i in `seq $smun`;do
echo -e "*\c"
done
echo
done
else
echo error
fi
10.國際象棋
for i in `seq 4`;do
for j in `seq 4`;do
for a in `seq 4`;do
echo -e "\033[46m \033[0m\c"
echo -e "\033[43m \033[0m\c"
done
echo
done
for k in `seq 4`;do
for b in `seq 4`;do
echo -e "\033[43m \033[0m\c"
echo -e "\033[46m \033[0m\c"
done
echo
done
done
bash腳本進階練習題