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In-depth analysis of the similarities and differences between nohup and &
In Linux systems, we often use the nohup command and the ampersand to run programs in the background to avoid the program being closed when the terminal is closed. Then close. Although they can both implement the function of running a program in the background, there are some differences between nohup and &. This article will provide an in-depth analysis of the similarities and differences between nohup and & to help readers better understand and use them correctly.
1. nohup command
1. Introduction
nohup is the abbreviation of "no hang up", its function It runs the command without hanging up. Even if the current terminal is closed, it will not affect the running of the program. Through the nohup command, we can run the program in the background to avoid program interruption due to the closing of the terminal.
2. How to use
To use the nohup command, just add nohup before the command. For example:
nohup command &
This will allow the command to run in the background and will not be affected by closing the terminal.
3. Features
2. & symbol
1. Introduction
In the Linux system, the ampersand symbol can convert commands Run in the background. Similar to nohup, using the & symbol prevents the program from being terminated when the terminal is closed. However, the & symbol does not have the additional features of the nohup command, such as redirecting output.
2. How to use
To use the & symbol, just add & at the end of the command. For example:
command &
This will make the command run in the background and be disconnected from the current terminal.
3. Features
bg
command to move it to the background. 3. Comparison of similarities and differences
Output processing:
Program running environment:
Function limitations:
in conclusion
In general, the nohup command and the & symbol can realize the function of placing the command in the background to avoid the program being terminated when the terminal is closed. Using the nohup command can better handle program output and terminal closing issues, and has a certain output redirection function; while the & symbol is simpler and more direct, suitable for simple background running needs.
In actual applications, choosing the appropriate way to run programs in the background according to different needs will be more conducive to improving efficiency and management. I hope this article will help readers understand the similarities and differences between the nohup command and the & symbol.
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