How do I redirect output to a file and screen in Linux?

Option One: Redirect Output to a File Only 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 output to console and file?

List:

1. command > output.txt. The standard output stream will be redirected to the file only, it will not be visible in the terminal.
2. command >> output.txt.
3. command 2> output.txt.
4. command 2>> output.txt.
5. command &> output.txt.
6. command &>> output.txt.
7. command | tee output.txt.
8. command | tee -a output.txt.

How do I redirect standard output to a file?

To redirect stderr as well, you have a few choices:

1. Redirect stdout to one file and stderr to another file: command > out 2>error.
2. Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1.

How do I write the output of a shell script?

Bash Script

1. #!/bin/bash.
2. #Script to write the output into a file.
3. #Create output file, override if already present.
4. output=output_file.txt.
5. echo “<<>>” | tee -a $output.
6. #Write data to a file.
7. ls | tee $output.
8. echo | tee -a $output.

What are different types of redirection in Linux?

Linux I/O Redirection

• standard input (stdin) : The stdin stream is numbered as stdin (0). The bash shell takes input from stdin.
• standard output (stdout) : The stdout stream is numbered as stdout (1). The bash shell sends output to stdout.
• standard error (stderr) : The stderr stream is numbered as stderr (2).

How do I add output to a file in Linux?

How to redirect the output of the command or data to end of file

1. Append text to end of file using echo command: echo ‘text here’ >> filename.
2. Append command output to end of file: command-name >> filename.

How to redirect output to screen and file?

That will be passed to the pipe with the tee application. script will start an interactive session and log all the output (stdout/stderr etc) to a file, or (with the -c parameter) will run a command and log the output of that.

How to redirect error output to a file in Linux?

Linux Redirect Error Output To File. Syntax To redirect all output to file. Syntax To redirect all error to file. Syntax to redirect both output (stdout) and errors (stderr) to different files. Syntax to redirect both output (stdout) and errors (stderr) to same file. Syntax to redirect errors (stderr) to null or zero devices.

How to redirect all output to file in Bash?

If you don’t specify a number then the standard output stream is assumed but you can also redirect errors /dev/null is the null device it takes any input you want and throws it away. It can be used to suppress any output. Credits to osexp2003 and j.a. …

Can You redirect LS output to a file?

I am doing following and it appending to file but not printing ls output on terminal. Yes, if you redirect the output, it won’t appear on the console. Use tee. It is worth mentioning that 2>&1 means that standard error will be redirected too, together with standard output.