Redirection
The redirection operator (>) redirects the output of a command to a file instead of displaying it in the terminal.
Redirect standard output to a file
command > filename (overwrites file content)
or
command >> filename (appends to file)
Redirect standard error to a file
command 2> filename (for stderr)
or
command > filename 2>&1 (both stdout and stderr)
Use a file as input for a command
command < filename
Pipes
Pipe is used to pass output of one command to another
ls . | grep file
Difference between a Pipe and Redirection Operations
| Pipe | Redirection | |
|---|---|---|
| Description | Connects the output stream of one command directly to the input stream of another command, allowing commands to work together in sequence. | Redirects the output of a command to a file instead of displaying it in the terminal. |
| Example | ls . | grep file | ls -l > output.txt |
| What it does | Lists files and filters results containing “file” | Saves directory listing to a file |