How do I redirect stdout to a file in Unix?
How do I redirect stdout to a file in Unix?
2 Answers
- Redirect stdout to one file and stderr to another file: command > out 2>error.
- Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1.
How do I redirect the output to a file in Unix shell script?
To use bash redirection, you run a command, specify the > or >> operator, and then provide the path of a file you want the output redirected to. > redirects the output of a command to a file, replacing the existing contents of the file.
How do I redirect to stdout?
Redirecting stderr to stdout When saving the program’s output to a file, it is quite common to redirect stderr to stdout so that you can have everything in a single file. > file redirect the stdout to file , and 2>&1 redirect the stderr to the current location of stdout . The order of redirection is important.
What is redirection in shell?
Before a command is executed, its input and output may be redirected using a special notation interpreted by the shell. Redirection allows commands’ file handles to be duplicated, opened, closed, made to refer to different files, and can change the files the command reads from and writes to.
How to redirect stdout to a file in Linux?
How to redirect stdout to a file. The standard output (stdout) redirect to file is as follows: command > file ls > /tmp/list.txt cat /tmp/list.txt OR command 1> file ls 1> /tmp/list.txt cat /tmp/list.txt The ls > /tmp/list.txt is just a shortcut for ls 1> /tmp/list.txt.
How to redirect one output (an FD) to two files in Linux?
If order of output must be: stdout then stderr; there is no solution with redirection only. Description: The only way to redirect one output (an fd like stdout or stderr) to two files is to reproduce it. The command tee is the correct tool to reproduce a file descriptor content.
How to include stderr in stdout in Linux?
The command you want is named tee: For example, if you only care about stdout: If you want to include stderr, do: 2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also directed to the given output file as of the tee command.
How to redirect stdout and stderr in Python?
For redirecting stdout, we use “1>” and for stderr, “2>” is added as an operator. We have created a file named “sample.txt” to store the redirected output in our current directory.
