Since the emergence of computers for decades, the rapid development of computers is accompanied by the changing of related things. The Linux operating system is very popular among users. This article describes the redirection command application and syntax in Linux.
1. Standard input control
Syntax: The command file sends the command execution result to the specified file.
For example:
Ls-l> list: Write the result of executing the "ls-l" command to the file list.
Syntax: Command>! The file sends the command execution result to the specified file. If the file already exists, it overwrites it.
For example:
Ls-lg>! List overwrites the result of executing the "ls-lg" command to the file list.
Syntax: Command> & file: write any information generated on the screen during command execution to the specified file.
For example:
Cc file1.c> & error writes any information generated when the file1.c file is compiled to the file error.
Syntax: Command> file: attaches the command execution result to the specified file.
For example:
Ls-lag> list: attaches the result of executing the "ls-lag" command to the file list.
Syntax: Command> & file: attaches any information generated on the screen during command execution to the specified file.
For example:
Cc file2.c> & error: attaches any information generated on the screen when the file2.c file is compiled to the file error.
3. command syntax
Command> filename redirects the standard output to a new file
Command> filename redirects the standard output to a file (append)
Command 1> fielname redirects standard output to a file
Command> filename 2> & 1 redirects the standard output and standard error to a file.
Command 2> filename redirects a standard error to a file
Command 2> filename redirects the standard output to a file (append)
Command> filename 2> & 1 redirects the standard output and standard error to a file (append)
Command filename2 uses the command file as the standard input and filename2 as the standard output.
Command & m redirects standard output to file descriptor m
Through this article, we hope that you can learn the Linux operating system to redirect command applications and syntax.
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