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Linux environment variable configuration summary

Linux environment variable configuration summary

You can customize an environment variable file, such as defining uusama.profile under a certain project. Use export to define a series of variables in this file, and then add: sourc uusama.profile after the ~/.profile file, so that you can You can use a series of variables defined by yourself in the Shell script when logging in.

Aug 03, 2023 pm 03:32 PM
linux
Summary: 20 Linux server performance tuning tips

Summary: 20 Linux server performance tuning tips

Linux is an open source operating system that supports various hardware platforms. Linux servers are world-famous. The main difference between Linux and Windows is that Linux servers generally do not provide a GUI (graphical user interface) by default, but a command line. The main purpose of the interface is to efficiently handle non-interactive processes. Response time is not so important. On the contrary, being able to handle high loads for a long time is the most critical.

Aug 03, 2023 pm 03:22 PM
linux linux服务器
Learn all aspects of Vim split-screen operation in 5 minutes

Learn all aspects of Vim split-screen operation in 5 minutes

Vim's split-screen function is implemented by splitting windows, which is a great tool for improving work efficiency. Whether we want to display two files at the same time, or display two different locations of a file at the same time, or compare two files side by side, etc., these can be achieved through split screen, which is very convenient for code comparison and copy and paste.

Aug 03, 2023 pm 03:20 PM
vim
9 practical shell scripts, recommended to collect!

9 practical shell scripts, recommended to collect!

9 practical shell scripts, recommended to collect!

Aug 03, 2023 pm 03:09 PM
shell Shell脚本
Classic Thirteen Questions About Shell Scripts

Classic Thirteen Questions About Shell Scripts

We know that the operation of a computer is inseparable from hardware, but it cannot directly operate the hardware. The driver of the hardware can only be controlled through a software called "OS (Operating System)." Strictly speaking, Linux is an operating system (OS).

Aug 03, 2023 pm 03:03 PM
shell Shell脚本
Summary of Linux performance optimization knowledge points · Practice + Collection Edition

Summary of Linux performance optimization knowledge points · Practice + Collection Edition

The essence of the performance problem is that the system resources have reached the bottleneck, but the request processing is not fast enough to support more requests. Performance analysis is actually to find the bottlenecks of the application or system and try to avoid or alleviate them.

Aug 03, 2023 pm 03:01 PM
linux Linux性能优化
Summary of Linux performance all-round tuning experience

Summary of Linux performance all-round tuning experience

The essence of the performance problem is that the system resources have reached the bottleneck, but the request processing is not fast enough to support more requests. Performance analysis is actually to find the bottlenecks of the application or system and try to avoid or alleviate them.

Aug 03, 2023 pm 02:59 PM
linux Linux性能优化
Linux - 11 steps to teach you how to perfectly check whether your server has been compromised

Linux - 11 steps to teach you how to perfectly check whether your server has been compromised

As open source products become more and more popular, as a Linux operation and maintenance engineer, it is crucial to be able to clearly identify whether abnormal machines have been hacked. Based on my own work experience, I have sorted out several common situations where machines have been hacked. for reference

Aug 03, 2023 pm 02:52 PM
linux
Classic Thirteen Questions about Shell Scripts You Should Know

Classic Thirteen Questions about Shell Scripts You Should Know

We know that computers cannot operate without hardware, but users cannot directly operate the hardware. The hardware drivers can only be controlled through a software called an operating system (OS). Strictly speaking, Linux is just an operating system (OS), which we call the kernel.

Aug 03, 2023 pm 02:50 PM
shell Shell脚本
Does Linux server need to be registered?

Does Linux server need to be registered?

Linux servers need to be registered. In mainland China, no matter whether the server uses Linux or other operating systems, as long as it provides Internet information services, it needs to be registered. Filing mainly refers to submitting relevant information of a website or network service to relevant departments for review and registration in order to supervise and manage the legality and security of network services. The purpose of registration is to ensure the legality of network services and prevent the spread of illegal information and the occurrence of network security issues.

Aug 03, 2023 pm 02:38 PM
linux
Can programs written in assembly be used on Linux?

Can programs written in assembly be used on Linux?

Programs written in assembly can be used in Linux, but they need to follow the following points: 1. Follow the ABI standard of the Linux system to ensure that the program is compatible with the interface of the operating system; 2. You need to use Linux system calls to access the functions of the operating system. You need to use Specific instructions to trigger system calls; 3. Need to understand the function calling specifications of the C language to correctly use the library functions provided by the Linux operating system to complete some advanced functions; 4. Need to understand the architecture and instruction set of the target computer, and Resources such as registers and memory need to be manually managed.

Aug 03, 2023 pm 02:33 PM
汇编程序 linux
How to compare two text files in linux

How to compare two text files in linux

How to compare two text files in Linux: 1. The diff command, "diff file1.txt file2.txt", can compare two files line by line; 2. The vimdiff command, "vimdiff file1.txt file2.txt", can be divided into Display two files on the screen; 3. cmp command, "cmp file1.txt file2.txt" compares two files byte by byte; 4. comm command, etc.

Aug 03, 2023 pm 01:42 PM
linux
How to cut files in linux

How to cut files in linux

How to cut files in Linux: 1. Use the split command to cut a large file into multiple smaller files, the syntax is "split [option] file name [prefix]"; 2. Use the dd command for conversion and copying The file tool can also be used to cut files. The syntax is "dd if=file name of=output file name bs=block size count=number of blocks"; 3. Use the csplit command to cut the file into regular expression matching patterns. Tool syntax "csplit[options]filenamepattern" for multiple files.

Aug 03, 2023 pm 01:34 PM
linux
How to set the first few lines of a file displayed in Linux

How to set the first few lines of a file displayed in Linux

How to set the first few lines of a file in Linux: 1. Use the head command to display the first n lines of the file by specifying the parameter -n; 2. Use the cat command in combination with the pipe and head command to pass the output of the cat command through the pipe (| ) is passed to the head command to display the first few lines of the file; 3. Using the sed command, you can use the sed command combined with the line number to display the first few lines of the file; 4. Using the awk command, you can use the awk command combined with the NR variable to display the file First few lines. 5. Other text editing tools, etc.

Aug 03, 2023 pm 12:00 PM
linux

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