Quick Tip

Redirecting stderr to stdout for Unified Logging

Challenge: When running commands, you often get output on standard error (stderr) and standard output (stdout) separately. This can make it difficult to capture all relevant information, especially for logging or debugging purposes.

The Solution: Use the `2>&1` redirection operator to merge stderr into stdout.

your_command 2>&1 | tee your_log_file.log

Why it works: In shell scripting, file descriptor `1` represents stdout and file descriptor `2` represents stderr. The `2>&1` tells the shell to redirect file descriptor 2 (stderr) to the same location as file descriptor 1 (stdout). The `tee` command then captures this unified stream and writes it to both the terminal and the specified log file.

Pro-Tip: You can also use `your_command > your_log_file.log 2>&1` to redirect both stdout and stderr to a file without displaying them on the terminal.

Linux Tips & Tricks | © ngelinux.com | 5/12/2026