Shulou(Shulou.com)06/03 Report--

Today, I will talk to you about the commonly used Shell scripts in PHP, which may not be well understood by many people. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

1. Create linux system account and password through location variable

$1 is the first parameter for executing the script, and $2 is the second parameter for executing the script.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 19Flux 19mod 4mm Name: userad.sh# Version: v1.roomDescription: This is a script. `useradd $1`echo "$2" | passwd-- stdin "$1"

2. Use the tar command to back up all log files under / var/log every 5 days to prevent file overwriting

Vim backup.shtar zcfP / tmp/varlog_$ (date +% F). Tar.gz / var/logcrontab-e* 5 bin/bash / server/scripts/backup.sh

3. Real-time monitor the local memory and the remaining space of the hard disk. Send an alarm email when the remaining memory is less than 500m and the remaining space of the root partition is less than 1000m.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 2029 Time Name: jiankong.sh# Version: v1.20th Description: This is a Script.free= `free-m | awk 'NR==3 {print$4}' `df= `df | awk 'NR==2 {print$4}' `if [[$free-lt 500 & & $df-lt 1000000]]; thenmail-s "Warning~" 1227566276@qq.comecho 'send variation echo' changeable exit 0fi

4. The script generates a random value of less than 100, prompts the user to guess the number, has more user input, and prompts the user to guess correctly, guess or guess small, until the end of the user guessing the script.

5. Check whether the current user of this machine is a super administrator. If you are an administrator, use yum to install vsftpd. If not, prompt you to be a non-administrator and use string comparison version.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 20 Time 4315 0mm Name: root.sh# Version: v1.The Description: This is a Script.root= `id-u`if [$root-eq 0]; thenyum install-y vsftpdelseecho'no super user~'fi

6. prompt the user to enter three integers in turn, and the script outputs three numbers according to the size of the numbers.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 20 Time 45https://home.cnblogs.com/zhangwduoduoj/# Name: 3geshu.sh# Version: v1.The Description: This is a Script.read-p "first:" aread-p "second:" bread-p "third:" cif [[- z $a | |-z $b | |-z $c]] Thenecho "please input num---" exit 1fiif [[- n "$(echo $a | sed-n" / ^ [0-9]\ + $/ p ")" & &-n "$(echo $b | sed-n" / ^ [0-9]\ + $/ p ")" & &-n "$(echo $c | sed-n" / ^ [0-9]\ + $/ p ")]]; thenif [$a-lt $b]; thent=$a;a=$b;b=$t;fiif [$a-lt $c]; thent=$a;a=$c;c=$t Fiif [$b-lt $c]; thent=$b;b=$c;c=$t;fiecho "big-small:$a,$b,$c" elseecho "dont abcd...." fi

7. Write a script to realize the man-machine game of "rock, scissors, paper"

8. Write a script to test which hosts in the entire network segment are powered on and which hosts are powered off (for version)

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 21 Brave 13 Time Name: ping1.sh# Version: v1.roomDescription: This is a Script.for I in {1.. 254} doping 192.168.4.roomi-c 2-w 1 2 & > 1 > / dev/nullif [$?-eq 0]; thenecho "192.168.4.roomi activist!" elseecho "192.168.4.Secreti down..." fidone

9. Write a script to test which hosts in the entire network segment are powered on and which hosts are turned off (multi-process version). Define a function to ping a host and check the inventory status of the host.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 21 Vlad 18V Name: ping2.sh# Version: v1.The Description: This is a Script.fun_ping () {ping 192.168.4.Secreti-c 1-w 12 & > 1 > / dev/nullif [$?-eq 0] then echo "192.168.4.Secreti active!" else echo "192.168.4.Secreti down. "fi} for i in {1.. 254} do fun_pingdone

10. when you write a script and copy a file, the progress bar is displayed.

11, 9: 9 multiplication table (write shell script, print 9: 9 multiplication table)

12. Use an endless loop to display the packet traffic sent by the eth0 network card in real time

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 21 (50) Name: eth5.sh# Version: v1.The Description: This is a Script.while: doifconfig eth5 | sed-n'5 Magazine 6p done

Using the personnel list in the user.txt file, automatically create the corresponding account on the computer and configure the initial password

To execute the script, you need to prepare a user.txt file in advance, which contains several user information

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 21 Patch 27purl 1mm Name: zidonguser.sh# Version: v1.The Description: This is a Script.user= `cat / server/scripts/ user.txt`for I in $userdouseradd $iecho "123456" | passwd-- stdin "$I" done

14. Write a script to modify the extension in batches, such as changing txt files to doc files in batches

When you execute a script, you need to add location parameters to the script

Script name txt doc (you can change the extension of txt to doc)

Script name doc jpg (you can change the extension of doc to jpg)

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 1815 58Time 1century Name: rename.sh# Version: v1.The Description: This is a Script.read-p "input weizhi" $wzfor i in `ls $wz`domv $I `echo $I | sed s#txt#doc# g`done

15. Check how many remote IP are connected to the local machine (whether through ssh, web or ftp)

Use netstat-atn to view all connection status on this machine, and-a to view all

-t displays only tcp connection information,-n numeric format

Local address (the fourth column is the native IP and port information)

Foreign address (the fifth is the IP and port information of the remote host)

Use the awk command to display only column 5 data, followed by column 1 IP address information

Sort can be sorted by the size of numbers, and finally use Uniq to delete redundant duplicates and count the number of repetitions.

# netstat-atn | awk-F "[:] +'{print $5} 'port number netstat-atn | egrep": 80 |: 22 |: 21 "| awk' {print $5}'| awk-F": "'{print $1}'| sort-rn | uniq-c

16. Sum all positive integers up to 100 (1, 2, 3. + 100)

Eq 100can generate 100integers quickly and automatically.

#! / bin/bash# Author: Peter zh# Blog: https://home.cnblogs.com/zhangwduoduoj/# Time: 2019-08-17 21 Time 10 bank Name: qiuhe.sh# Version: v1.The Description: This is a Script.sum=0for I in `seq 100dolet sum+=idoneecho $sum after reading the above, do you have any further understanding of the Shell scripts commonly used in PHP? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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