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

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.

• ##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.

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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

##20.Saltstack Client

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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

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• ##31. Automatic backup of MySQL database every day
##32. Single cycle backup of MySQL database
33.MySQL database backup multi-cycle
• ##34.Nginx log cutting as required
• 35. Generate 10 random numbers and save them in an array and find their maximum and minimum values
• 36. View the real-time traffic of the network card
• 37. Server system configuration initialization
• 38 .Create multiple users in batches and set passwords
• 39. View server utilization with one click
• 40. Find the process that takes up too much CPU memory

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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)

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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 the 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

  
  

##Note: The information is compiled from the Internet and is only for free exchange and sharing , infringement and deletion

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