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1.打印九九乘法口诀
我要评论1 for i in `seq 9` ;do
2 for j in `seq 9` ;do
3 if [ $i -ge $j ];then
4 let sum=${i}*${j}
5 echo -e "${i}x${j}=$sum\t\c"
6 fi
7 done
8 echo
9 done
1 disk=`fdisk -l | egrep -o "^/dev/[[:alpha:]]+[0-9]"`
2 #disk=`lsblk | sed -rn "s/^├─([[:alpha:]]{3}[1-9]).*/\1/p"`
3 max_num=0
4
5 for name in `echo $disk`;do
6 #有可能是交换空间，df命令就没有显示。直接跳过
7 if ! df | egrep -o "^$name.*" &> /dev/null;then
8 continue
9 fi
10 #获取使用空间和inodes
11 num=`df | egrep -o "$name.*" | tr -s " " "%" | cut -d "%" -f 5`
12 inodes_num=`df -i | egrep -o "$name.*" | tr -s " " "%" | cut -d "%" -f 5`
13 #使用空间和inodes大于80就发出警告。
14 if [ $num -ge 80 -o $inodes_num -ge 80 ];then
15 if [ $num -gt $max_num ];then
16 max_num=$num
17 max_name=$name
18 max_inodes_num=$inodes_num
19
20 elif [ $num -eq $max_num ];then
21 max_equal_num=$num
22 max_equal_name=$name
23 max_equal_inodes_num=$inodes_num
24 fi
25 fi
26 done
27 #判断是否有超过80的
28 if [ $max_num -ne 0 ];then
29 let remaining=100-$max_num
30 let inodes_remaining=100-$max_inodes_num
31
32 #判断是否有两个分区使用量一样
33 if [ -z $max_equal_num ];then
34 wall the $max_name disk is about to run out, only the remaining disk is ${remaining}% and inodes${inodes_remaining}%
35 else
36 wall the $max_name and $max_equal_name disk is about to run out, only the remaining disk is ${remaining}% and inodes${inodes_remaining}%
37 fi
38 fi
3.打印国际象棋
1 for j in `seq 8`;do 2 if [ $[$j%2] -eq 0 ];then 3 for i in `seq 4`;do 4 echo -e "\e[41m \e[0m\e[43m \e[0m\c" 5 done 6 else 7 for i in `seq 4`;do 8 echo -e "\e[43m \e[0m\e[41m \e[0m\c" 9 done 10 fi 11 echo 12 done
1 cat /dev/null > /tmp/suiji.txt
2
3 for i in {1..10};do
4 echo $random >> /tmp/suiji.txt
5 done
6
7 max=`cat /tmp/suiji.txt | sort -n | tail -n 1`
8 min=`cat /tmp/suiji.txt | sort -n | head -n 1`
9
10 echo all random is `cat /tmp/suiji.txt | xargs`
11 echo max is $max
12 echo min is $min
13
14 rm -rf /tmp/suiji.txt
1 for char in efbaf275cd 4be9c40b8b 44b2395c46 f8c8873ce0 b902c16c8b ad865d2f63;do
2
3 for num in `seq 32767`;do
4 k=`echo ${num} | md5sum | cut -c 1-10`
5 if [ $k == $char ];then
6 echo $num
7 break
8 fi
9 done
10 done
for i in `seq 10`;do
#生成8个字母
name=`openssl rand -base64 20 | grep -o "[[:alpha:]]" | head -n 8 | xargs | tr -d " "`
#控制数字1~10
while true;do
num=$[$random%11]
if [ $num -ne 0 ];then
break
fi
done
#创建文件
touch /testdir/$num$name.html
done
1 for user in `echo test{1..10}`;do
2
3 id $user &> /dev/null && echo "$user exist" && continue
4 useradd $user
5 pass=`openssl rand -base64 12 | cut -c 1-10`
6 echo $pass | passwd --stdin $user &> /dev/null
7 echo -e "user:$user\npasswd:$pass"
8
9 done
1 sum=0 2 for num in `seq 100`;do 3 if [ $[$num%3] -eq 0 ];then 4 let sum+=$num 5 fi 6 done 7 echo "sum=$sum"
1 read -p "please enter 1 to add to? : " n 2 sum=0 3 4 for num in `eval seq $n`;do 5 let sum+=$num 6 done 7 8 echo "sum=$sum"
1 read -p "please enter the directory to be judged: " dir 2 3 if [[ "`echo $dir | sed -rn "s/^.*(.)$/\1/p"`" != "/" ]];then 4 if [[ ! -f $dir ]];then 5 dir=$dir/ 6 else 7 echo -e "\e[31mplease enter the directory\e[0m" 8 exit 9 fi 10 fi 11 12 for file in `ls $dir`;do 13 if [[ -f $dir$file ]];then 14 echo "$file is file" 15 elif [[ -d $dir$file ]];then 16 echo "$file is direction" 17 elif [[ -c $dir$file ]];then 18 echo "$file is character" 19 elif [[ -l $dir$file ]];then 20 echo "$file is link" 21 else 22 echo "unknown type" 23 fi 24 done
1 i=$[$random%11] 2 while true;do 3 read -p "please enter a lucky number(0-10): " num 4 5 if [ $i -eq $num ];then 6 echo "congratulations, you guessed it." 7 exit 8 elif [ $num -lt $i ];then 9 echo -e "sorry, the input is too small.\n" 10 else 11 echo -e "sorry, the input is too big.\n" 12 fi 13 done
1 read -p "enter the ip address segment to be detected. such as 192.168.100.0: " ip
2 net=`echo $ip | sed -nr "s/^(([0-9]{1,3}\.){3}).*/\1/p"`
3
4 if [[ -z $net ]];then
5 echo -e "\e[31mplease enter a reasonable ip address\e[0m"
6 exit
7 fi
8
9 echo -e "\nstart detection at `date` o'clocki" >> /data/host_up.log
10 echo -e "\nstart detection at `date` o'clocki" >> /data/host_down.log
11
12 i=1
13 while [ $i -le 10 ];do
14 if ping -c 1 -w 1 $net$i &> /dev/null;then
15 echo $net$i is up >> /data/host_up.log
16 else
17 echo $net$i is down >> /data/host_down.log
18 fi
19 let i++
20 done
1 read -p "input needs to monitor users: " user 2 while true ; do 3 if who | grep "^$user" > /dev/null ;then 4 echo "$user is logging in at `date '+%f %t'`" >> /data/login.log 5 exit 6 fi 7 sleep 3 8 done
1 for((i=1;i<=10;i++));do 2 3 read -p "enter the number to compare(enter end input): " num_$i 4 val=`eval echo '$'num_$i` 5 6 if [[ -z $val ]];th 7 break 8 fi 9 10 [ $i -eq 1 ] && max=$val 11 [ $i -eq 2 ] && min=$val 12 13 if [ $max -le $val ];then 14 max=$val 15 fi 16 17 [ $i -ge 2 ] && if [ $min -ge $val ];then min=$val ;fi 18 done 19 20 echo "max=$max;min=$min"
1 odd_num=0 2 even_num=0 3 4 i=1 5 while [ $i -le 100 ];do 6 if [ $[$i%2] -eq 0 ];then 7 let even_num+=i 8 else 9 let odd_num+=i 10 fi 11 let i++ 12 done 13 14 echo odd number is $odd_num 15 echo even is $even_num
1 read -p "please enter a positive integer: " num 2 if [[ "$num" =~ ^[0-9]+$ ]];then 3 if [ $num -gt 0 ];then 4 echo "you are entering a positive integer." 5 else 6 echo "0 is not a positive integer" 7 fi 8 else 9 echo "you are not entering a positive integer" 10 fi
1 for file in `ls /etc/rc.d/rc3.d/`;do 2 3 if echo $file | sed -rn "s/^(s.*)$/\1/";then 4 echo "$file start" 5 elif echo $file | sed -rn "s/^(k.*)$/\1/";then 6 echo "$file stop" 7 fi 8 9 done
1 file=1 2 until [[ "$file" == "0" ]];do 3 read -p "please enter the file to be counted(0 exit script): " file 4 5 if [[ -f $file ]];then 6 echo -e "$file the total number of lines is `wc -l < $file`\n" 7 elif [[ "$file" != "0" ]];then 8 echo -e "$file not file\n" 9 fi 10 11 done
1 read -p "please enter the height: " high 2 for row in `seq $high`;do 3 let num_1=$high-$row 4 let num_2=2*$row-1 5 6 for space in `seq $num_1`;do 7 echo -e " \c" 8 done 9 10 for star in `seq $num_2`;do 11 echo -e "*\c" 12 done 13 14 echo 15 done
1 read -p "please enter yes or no: " input
2
3 if [[ "$input" =~ [yy]([ee][ss]){,1} ]];then
4 echo "your choice is yes"
5 elif [[ "$input" =~ [nn]([oo]]){,1} ]];then22:45:12
6 echo "your choice is no"
7 else
8 echo "your choice is neither yes nor no"
9 fi
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