Redirection command application and its syntax in Linux
Source: Internet
Author: User
Article Title: Redirection command application and its syntax in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories 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
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.