1、每天的2點和12點整，將/etc備份至/testdir/backup目錄中，保存的文件名稱格式為“etcbak-yyyy-mm-dd-HH.tar.xz”
mkdir /testdir/backup
vim /root/bin/etcbak.sh
tar cvf /testdir/backup/etcbak-`date "+%F-%H"`.tar.xz /etc
chmod +x etcbak.sh
crontab -e
0 2,12 * * * /root/bin/etcbak.sh
2、每周2, 4, 7備份/var/log/messages文件至/logs目錄中，文件名形如“messages-yyyymmdd”
vim /root/bin/messages.sh
cp /var/log/messages /app/logs/messages-`date "+%Y%m%d"`
chmod +x messages.sh
crontab -e
0 0 * * 2,4,7 /root/bin/messages.sh
3、每兩小時取出當前系統/proc/meminfo文件中以S或M開頭的信息追加至/tmp/meminfo.txt文件中
crontab -e
0 */2 * * * grep "^[S|M].*" /proc/meminfo >> /tmp/meminfo.txt
4、工作日時間，每10分鐘執行一次磁盤空間檢查，一旦發現任何分區利用率高于80%，就執行wall警報
crontab -e
vim disk.sh
[ `df -h |grep "^/dev/sd" |tr -s " " "%"|cut -d"%" -f5|sort -nr|head -1` -lt 80 ] || wall Disk will be full
*/10 * * * * /root/bin/disk.sh
5、編寫腳本/root/bin/createuser.sh，實現如下功能：使用一個用戶名做為參數，如果指定參數的用戶存在，就顯示其存在，否則添加之；顯示添加的用戶的id號等信息
read -p "give an username:" name
if id $name &> /dev/null;then
echo "the user is exist"
else
useradd $name
echo "user id is `id -u $name`"
fi
6、編寫腳本/root/bin/yesorno.sh，提示用戶輸入yes或no,并判斷用戶輸入的是yes還是no,或是其它信息
read -p "go with me play football,yes or no :" answer
answer=`echo $answer | tr 'A-Z' 'a-z'`
if [ $answer == yes -o $answer == y ] ; then
echo "you are a playboy"
elif [ $answer == no -o $answer == n ] ; then
echo "you are not a playboy"
else
echo "you answer is false"
fi
7、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）
read -p "you must give filename:" filename
if [ -L $filename ];then
echo "the file is link file"
elif [ -f $filename ];then
echo "the file is flat file"
elif [ -d $filename ];then
echo "the file is dir file"
elif [ -b $filename ];then
echo "the file is block device file"
elif [ -c $filename ];then
echo "the file is char device file"
elif [ -p $filename ];then
echo "the file is pipe file"
elif [ -S $filename ];then
echo "the file is socket file"
else
echo "You input the wrong filename"
fi
8、編寫腳本/root/bin/checkint.sh,判斷用戶輸入的參數是否為正整數
read -p "plase input number:" num
if [[ "$num" =~ ^[0-9]+$ ]];then
echo "the number is positive whole number"
else
echo "input error"
fi
9、判斷/var/目錄下所有文件的類型
for i in $@ ; do
if [ -L $i ];then
echo "the $i is link file"
elif [ -f $i ];then
echo "the $i is flat file"
elif [ -d $i ];then
echo "the $i is dir file"
elif [ -b $i ];then
echo "the $i is block device file"
elif [ -c $i ];then
echo "the $i is char device file"
elif [ -p $i ];then
echo "the $i is pipe file"
elif [ -S $i ];then
echo "the $i is socket file"
else
echo "You input the weong filename"
fi
done
10、添加10個用戶user1-user10，密碼為8位隨機字符
for i in {1..10};do
if id user$i &> /dev/null ; then
echo "the user$i is exsit"
passwd `tr -dc 'a-zA-Z0-9'< /dev/urandom |head -c8` &> /dev/null | passwd
--stdin user$i &> /dev/null echo "user$i passwd is finished"
else
useradd user$i
passwd `tr -dc 'a-zA-Z0-9'< /dev/urandom |head -c8` &> /dev/null | passwd
--stdin user$i &> /dev/null echo "add user$i and passwd is finished"
fi
done
11、/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開頭的文件輸出為文件加stop，以S開頭的文件輸出為文件名加start
“K34filename stop”
“S66filename start”
方法一：
ls /etc/rc.d/rc3.d/ | sed -n -e 's#^K.*#& stop#p' -e 's#^S.*#& start#p'
方法二：
for i in `ls /etc/rc.d/rc3.d` ;do
echo $i | sed -n -e 's#^K.*#& stop#p' -e 's#^S.*#& start#p'
done
12、編寫腳本，提示輸入正整數n的值，計算1+2+…+n的總和
read -p "you must give a positive number: " num
sum=0
for i in `seq 1 $num` ;do
let sum=sum+i
done
echo "The sum is $sum"
13、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 "please input an ip : " IP
for i in $IP ; do
nmap -v -sn $IP/24 | grep -B 1 "Host is up"
done
14、打印九九乘法表
for i in {1..9} ;do
for j in `seq 1 $i` ;do
echo -e "$i*$j=$(($i*$j))\t\c"
done
echo
done
15、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 {1..10} ;do
for j in `tr -dc 'a-zA-Z'< /dev/urandom |head -c8` ; do
touch /testdir/$i$j.html
done
done
16、提示輸入行數n，打印相應n行的等腰三角形用while實現
方法一：
for i in {1..9} ; do
for j in `seq 1 $((9-$i))` ; do
echo -e " \c"
done
for k in `seq 1 $((2*$i-1))` ;do
echo -e "^\c"
done
echo
done
方法二
i=1
while [ $i -le 9 ] ; do
j=1
while [ $j -le $((9-$i)) ] ; do
echo -e " \c"
let j++
done
k=1
while [ $k -le $((2*$i-1)) ] ; do
echo -e "^\c"
let k++
done
let i++
echo
done
17、編寫腳本，求100以內所有正奇數之和
方法一
i=0
sumji1=0
sumou1=0
while [ $i -le 100 ] ; do
if [ $(($i%2)) == 0 ] ;then
let sumou1=sumou1+i
else
let sumji1=sumji1+i
fi
let i++
done
echo "The sumji is $sumji1"
echo "The sumou is $sumou1"
方法二：
for i in {1..100};do
if [ $(($i%2)) == 0 ] ;then
let sumou=sumou+i
else
let sumji=sumji+i
fi
done
echo "The sumji is $sumji"
echo "The sumou is $sumou"
18、編寫腳本，提示請輸入網絡地址，如192.168.0.0，判斷輸入的網段中主機在線狀態，并統計在線主機和離線主機各多少
read -p "please input an ip : " IP
ip=$IP
i=0
ipup=0
ipdown=0
while [ $i -le 2 ] ; do
j=0
while [ $j -le 2 ] ; do
if [ $i == 0 -a $j == 0 ] || [ $i==255 -a $j == 255 ] ;then
ping -b -c 1 -W 1 $ip.$i.$j &> /dev/null
if [ $? == 0 ] ; then
echo "The $ip.$i.$j is up"
let ipup++
else
echo "The $ip.$i.$j is down" &> /dev/null
let ipdown++
fi
else
ping -c 1 -W 1 $ip.$i.$j &> /dev/null
if [ $? == 0 ] ; then
echo "The $ip.$i.$j is up"
let ipup++
else
echo "The $ip.$i.$j is down" &> /dev/null
let ipdown++
fi
fi
let j++
done
let i++
done
echo "host up is $ipup"
echo "host down is $ipdown"
19、編寫腳本，打印九九乘法表
i=1
while [ $i -le 9 ] ; do
j=1
while [ $j -le $i ] ; do
echo -e "$i*$j=$(($i*$j))\t\c"
let j++
done
echo
let i++
done
20、編寫腳本，利用變量RANDOM生成10個隨機數字，輸出這個10數字，并顯示其中的最大值和最小值
方法一：
for i in {1..10} ; do
k=`echo $RANDOM`
l="$l $k"
if [ $i -eq 1 ] ; then
let max=$k
let min=$k
fi
if [ $k -ge $max ]; then
let max=$k
elif [ $k -le $min ] ; then
let min=$k
fi
done
echo $l
echo max $max
echo min $min
方法二：
i=1
while [ $i -lt 10 ] ; do
k=`echo $RANDOM`
l="$l $k"
if [ $i -eq 1 ] ; then
let max=$k
let min=$k
fi
if [ $k -ge $max ]; then
let max=$k
elif [ $k -le $min ] ; then
let min=$k
fi
let i++
done
echo $l
echo max $max
echo min $min
方法三：
i=1
while [ $i -le 10 ] ; do
let random=`echo $RANDOM`
z="$z $random"
while [ $i -eq 1 ] ; do
let max=$random
let min=$random
let i++
done
j=1
while [[ $j -le 1 ]] ;do
[[ $random -gt $max ]] && max=$random
let j++
done
j=1
while [[ $j -le 1 ]] ;do
[[ $random -lt $min ]] && min=$random
let j++
done
let i++
done
echo the $z
echo the max is $max
echo the min is $min
21、編寫腳本，實現打印國際象棋棋盤
方法一：
i=1
while [ $i -le 8 ] ; do
if [ $(($i%2)) == 1 ]; then
j=1
while [ $j -le 4 ] ; do
echo -e "\033[41m \033[0m\c"
echo -e "\033[43m \033[0m\c"
let j++
done
else
k=1
while [ $k -le 4 ] ; do
echo -e "\033[43m \033[0m\c"
echo -e "\033[41m \033[0m\c"
let k++
done
fi
echo
let i++
done
方法二：
for i in {1..8} ; do
if [ $(($i%2)) == 1 ]; then
for j in {1..4} ; do
echo -e "\033[41m \033[0m\c"
echo -e "\033[43m \033[0m\c"
done
else
for k in {1..4} ; do
echo -e "\033[43m \033[0m\c"
echo -e "\033[41m \033[0m\c"
done
fi
echo
done
方法三：
until [ $I -gt 8 ] ; do
if [ $(($I%2)) == 1 ]; then
J=1
until [ $J -gt 4 ] ; do
echo -e "\033[41m \033[0m\c"
echo -e "\033[43m \033[0m\c"
let J++
done
else
K=1
until [ $K -gt 4 ] ; do
echo -e "\033[43m \033[0m\c"
echo -e "\033[41m \033[0m\c"
let K++
done
fi
echo
let I++
done
22、后續六個字符串：efbaf275cd、4be9c40b8b、44b2395c46、f8c8873ce0、b902c16c8b、ad865d2f6是通過對隨機數變量RANDOM隨機執行命令：echo $RANDOM|md5sum|cut –c1-10后的結果，請破解這些字符串對應的RANDOM值
for k in {1..32767} ; do
i=`echo $k |md5sum|cut -c1-10`
if [ $i == efbaf275cd ] ; then
echo "the efbaf275cd is m5m $k create"
elif [ $i == 4be9c40b8b ] ; then
echo "the 4be9c40b8b is m5m $k create"
elif [ $i == 44b2395c46 ] ; then
echo "the 44b2395c46 is m5m $k create"
elif [ $i == f8c8873ce0 ] ; then
echo "the f8c8873ce0 is m5m $k create"
elif [ $i == b902c16c8b ] ; then
echo "the b902c16c8b is m5m $k create"
elif [[ $i == ad865d2f6* ]] ; then
echo "the ad865d2f6 is m5m $k create"
fi
done
以上內容為個人實驗腳本，考慮不是很周全，還望海涵，謝謝！
原創文章，作者：CL80516000，如若轉載，請注明出處：http://www.www58058.com/71877
