How to Run Programs Silently in the Background on Linux

When a program generates a large amount of log output but you only need it to run briefly, you can hide its logs by running it in the background. This guide demonstrates several methods using standard Linux shell commands.

Running a Program in the Background

Appending an ampersand ( &) to the command starts the program as a background job: ./test & However, the program will still write its standard output and error to the terminal.

Redirecting Log Output

To suppress terminal output completely, redirect both standard output and standard error to a file: ./test >> out.txt 2>&1 & Here 2>&1 merges the error stream into the output stream, sending everything to out.txt. Note that this approach is unsuitable if the program expects input from stdin, as it will block waiting for data.

Finding Background Jobs

You can list background jobs with two common commands:

jobs : shows jobs started from the current shell, e.g., jobs -l, displaying their PIDs and states (running, stopped, terminated).

ps : searches the process table, e.g., ps aux | grep test, to locate processes by name.

Using nohup for Persistent Background Execution

If you need the program to continue running after you log out or close the terminal, use nohup (no hang‑up). The basic form is: nohup ./test & By default, output is written to nohup.out. To direct output to a specific file while also running in the background, combine redirection with nohup: nohup ./test > myout.txt 2>&1 & This command runs the program persistently, merges error output with standard output, and stores everything in myout.txt. After starting a nohup job, exit the shell normally (e.g., using exit) to ensure the background process remains alive.

These techniques allow you to keep the terminal clean, manage log files, and maintain long‑running tasks on Linux systems.