109 practical shell script examples, the code is clear and easy to use!-Linux Operation and Maintenance-php.cn

Shell script is to use the command interpretation function of Shell to parse a plain text file and then execute these functions. It can also be said that Shell script is a collection of a series of commands.

Shell can be used directly on win/Unix/Linux, and can call a large number of system internal functions to interpret and execute programs. If we are proficient in Shell scripts, we can operate the computer more easily. It’s easier and saves a lot of time.

This document compiles 109 shell scripts from the Internet. I hope it will be helpful to everyone. The code is clear and reproducible. The electronic version is conducive to everyone practicing at any time and improving practical capabilities. It is a masterpiece that integrates all the core knowledge points of Shell scripts. It is a perfect tool for learning, improving, and interviewing. The must-have products , I suggest you collect them and save them.

109 practical shell script examples, the code is clear and easy to use!

##1.Dos attack prevention (automatic blocking of attack IP)
2.Linux system sends alarm script
3.MySQL database backup single cycle
4.MySQL database backup multi-cycle
5.Nginx access log press Sky cutting
6.Nginx access log analysis script
7.View the network card in real time Traffic script
8. Server system configuration initialization script
9. Monitor 100 units Server disk utilization script
#10. Concurrently obtain hostname from several machines, record the time it takes to return information, and redirect to a file hostname.txt , after all is completed, the CPU information of the machine that takes the shortest time is output.

109 practical shell script examples, the code is clear and easy to use!

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#11 . Statistics on the number of Linux processes under the /proc category, output the total number of processes, the number of runninq processes, the number of stopped processes, the number of sleeping processes, and the number of zo mbie processes.
12. Change the suffix of all files with the suffix ".sh" in the current directory (including subdirectories) to ".shell", and then delete each The second line of the file.
13. Determine whether the directory /tmp/jstack exists. If it does not exist, create a new directory. If it exists, delete all contents in the directory.
14. Intercept all gc information logs of the day from test.loq, and count the average gc time and the longest time.
15. Find the top 20 IP addresses with the highest number of requests for port 80, and determine whether the smallest number of requests in the middle is greater than 500. If it is greater than 500, output the system The activity is reported to alert.txt. If not, try again after 600s until there is output.
16. Transfer files larger than 10K in the current directory to the /tmp directory, and then output the file names in order of file size from large to small.
17. Enterprise WeChat Alarm
18.FTP Client
19.SSH Client

109 practical shell script examples, the code is clear and easy to use!

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#21.vCenter Client
22. Get the domain name ssl certificate expiration time
#23. Send today’s weather forecast and future weather Super potential graph
24.SVN full backup
25.zabbix monitoring user password Expired
26. Build local YUM
27. Back up current date file
28. DOS attack prevention (automatic blocking of attack IP)
29. How many batches are created? Create a user and set a password
30. Quickly set up a LAMP server and WordPress blog on Ubuntu 20.04

109 practical shell script examples, the code is clear and easy to use!

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##31. Automatically back up MySQL database every day
32. Single cycle MySQL database backup
33.MySQL database backup multi-cycle

109 practical shell script examples, the code is clear and easy to use!

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41. Check the real-time traffic of the network card
42. Monitor more Server disk utilization script
43. Batch check whether the website is abnormal and notify by email
44. Batch host remote execution command script
45. One-click deployment of LNMP website platform script
46. Script to monitor whether the MySQL master-slave synchronization status is abnormal
47.MySgl database backup script
48.Nginx access log analysis
49.Nginx access log automatically cuts by day (week, month)
50. Automatically publish Java projects (Tomcat)

109 practical shell script examples, the code is clear and easy to use!

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51. Automatically publish PHP projects
52.DOS attack prevention (automatic blocking of attack IP)
53. Directory intrusion detection and alarm
##54. Local selection script auto build.sh
55. Server compilation script build.shThe first one to use is {$#}and ($@) followed by the string interception operation
56. Local expect login copy scp exec.sh script
57. Check the consistency of the files in the specified directories of the two servers
58. Clear the file content regularly and record the file size regularly
59. Detect network card traffic and record it in the log according to the specified format
## 60. Count the number of numbers appearing in each line of the document, and calculate the total number of numbers in the entire document
61. Download the file from the FTP server
62. Enter five consecutive numbers within 100, and count the sum, minimum and maximum
63. Monitor Nginx access log 502 situation and take corresponding actions
#64. Assign the results to variables
65. Batch modify file names
66. Count the total size of files ending with html in the current directory
67. Scan the host port status
68. Enter the number to run the corresponding command
69.Expect to implement SSH interactive command execution
70.Monitor the number of httpd processes and handle accordingly
71. Modify server user passwords in batches
72.iptables automatically blocks access to website frequencies IPs that must be complicated
73. According to the web access log, block IPs with abnormal request volume. If the IP returns to normal after half an hour, the ban will be lifted
74. Determine whether the user input is an IP address
76. Poll to detect Apache Status and enable DingTalk alarm
77. One monitoring host and one monitored host. If the usage rate of the monitored host partition is greater than 80%, an alert email will be sent. Put it in crontab and execute it every 10 minutes.
78. Monitor the disk space of the host and send a warning by sending an email when the used space exceeds 90%
79. Automatic ftp upload
80.mysqlbak.sh backup database directory script
81. Print rainbow
82. Print diamond
83.expect to realize remote login automatic interaction
84.http heartbeat detection
85. Automatically implement firewall IP blocking due to excessive PV
86. ShellI implement automatic installation
87.shell implements insertion sorting
##88.bash implements dynamic progress bar
89. Create an account based on the file content
90. Red progress bar
91. Monitor server network card traffic
92. Check the remaining CPU percentage
93. Check the disk Remaining space
##94.bash-implementation of detecting apache status and setting alarm
95. Memory detection
96. Remaining inode detection
97. Determine which users Logged into the system
98. Create accounts in batches
99. Batch scan to survive
100. Regular match IP
101. Regular match email
102. Achieve cloth patch effect
103. Eliminate users outside the whitelist
104. One-click installation of MongoDB database script

##105. Use mobaXtrem to display graphical tools on CentOS

106. One-click application for multiple certificate shell scripts

107. One-click compilation and installation of Redis based on CentOS Script

108. One-click installation of tomcat script based on CentOS

109. One-click installation Certificate application and issuance script

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