Shell Script 100 Example "II"

11. Scripting, man-machine < stone, scissors, cloth > Games
#!/bin/bash
#Author: The Adventures of Tintin (Jacob)
Game= (Stone scissors cloth)
NUM=$[RANDOM%3]
computer=${game[$num]}
#通过随机数获取计算机的出拳
#出拳的可能性保存在一个数组中, game[0],game[1],game[2] are different possibilities in 3, respectively.

echo "Please select your punch gesture according to the following tips"
echo "1. Stone"
echo "2. Scissors"
echo "3. Cloth"

Read‐p "Please select 1‐3:" Person
Case $person in
1)
If [$num ‐eq 0];then

echo "Draw"
elif [$num ‐eq 1];then

echo "You Win"
Else

echo "Computer wins"
fi;;
2)
If [$num ‐eq 0];then

echo "Computer wins"
elif [$num ‐eq 1];then

echo "Draw"
Else

echo "You Win"
fi;;
3)
If [$num ‐eq 0];then

echo "You Win"
elif [$num ‐eq 1];then

echo "Computer wins"
Else

echo "Draw"
fi;;
*)
echo "must enter number of 1‐3"
Esac

12. Write a script to test which hosts are turned on and which are powered off in the entire 192.168.4.0/24 network segment
Status (for version)
#!/bin/bash
For i in {1..254}
Do
Ping‐c2‐i0.3‐w1 192.168.4. $i &>/dev/null
If [$?–eq 0];then
echo "192.168.4. $i is Up"
Else
echo "192.168.4. $i is Down"
Fi
Done

13. Write a script to test which hosts are turned on and which are powered off in the entire 192.168.4.0/24 network segment
Status (while version)
#!/bin/bash
I=1
While [$i ‐le 254]
Do
Ping‐c2‐i0.3‐w1 192.168.4. $i &>/dev/null
If [$?–eq 0];then
echo "192.168.4. $i is Up"
Else
echo "192.168.4. $i is Down"
Fi
Let i++
Done

14. Write a script to test which hosts are turned on and which are powered off in the entire 192.168.4.0/24 network segment
Status (multi-process version)
#!/bin/bash
#Author: The Adventures of Tintin (Jacob)
#定义一个函数, ping a host, and detect the host's survival status
Myping () {
PING‐C2‐I0.3‐W1 $ &>/dev/null
If [$?‐eq 0];then
echo "is up"
Else
echo "is down"
Fi
}
For i in {1..254}
Do
Myping 192.168.4. $i &
Done
#使用 & symbols, put the executed function into the background execution
#这样做的好处是不需要等待 Ping the response of the first host, you can continue to ping the second host concurrently, and so on.

15. Write a script to show the progress bar
#!/bin/bash
Jindu () {
While:
Do
Echo‐n ' # '
Sleep 0.2
Done
}
Jindu &
Cp‐a $
Killall $!
echo "Copy Complete"

16. Progress bar, Dynamic hour version
#!/bin/bash
#定义一个显示进度的函数, quick Screen Display | / ‐ \
Rotate_line () {
interval=0.1 #设置间隔时间
count= "0" #设置 the number of 4 shapes, the default number is 0 (does not represent any image)
While:
Do
Count= ' expr $COUNT + 1 ' #执行循环, COUNT each loop plus 1, (represents 4 different shapes respectively)
Case $COUNT The value of the in #判断 COUNT, the shape is not the same as the value shown
"1") #值为 1 Display ‐
Echo‐e '-' \b\c '
Sleep $INTERVAL
;;
"2") #值为 2 shows \ \, first \ is escaped
Echo‐e ' \ \ ' "\b\c"
Sleep $INTERVAL
;;
"3") #值为 3 Display |
Echo‐e "|\b\c"
Sleep $INTERVAL
;;
"4") #值为 4 Display/
Echo‐e "/\b\c"
Sleep $INTERVAL
;;
*) #值为其他时, resets the COUNT to 0
count= "0";;
Esac
Done
}
Rotate_line

17.9*9 Multiplication Table (write shell script, print 9*9 multiplication table)
#!/bin/bash

For i in ' seq 9 '
Do
For j in ' Seq $i '
Do
Echo‐n "$i * $j =$[i*j]"
Done
Echo
Done

18. Use the dead loop to display the packet traffic sent by the ETH0 network card in real time
#!/bin/bash
#Author: The Adventures of Tintin (Jacob)
While:
Do
Echo ' Local NIC eth0 traffic information is as follows: '
Ifconfig eth0 | grep "RX Pack" | awk ' {print $} '
Ifconfig eth0 | grep "TX Pack" | awk ' {print $} '
Sleep 1
Done

19. Use the list of people in the User.txt file to automatically create the corresponding account and configure the initial password on the computer
#!/bin/bash
#本脚本执行, you need to prepare a user.txt file in advance that contains several user name information
For i in ' Cat User.txt '
Do
Useradd $i
echo "123456" | Passwd‐‐stdin $i
Done

20. Write bulk modify extension scripts, such as batch to modify TXT file to doc file
#!/bin/bash
#执行脚本时, you need to add positional parameters to the script
#脚本名 txt doc (you can modify the txt extension to doc)
#脚本名 doc jpg (can modify Doc's extension to jpg)

For i in "LS *.$1"
Do
MV $i ${i%.*}.$2
Done

Shell Script 100 Example "II"