Where Does wget Save Background Downloads?

When you run the wget command in the background using the -b or --background option, it automatically redirects its standard output and progress log to a file named wget-log in the current working directory. The actual file or files you are downloading are saved to that same directory where you initiated the command, unless you explicitly specify a different destination path using the -O or -P flags.

Understanding the wget-log File

Because background processes cannot print text directly to your active terminal window, wget needs a place to record its progress, download speed, and any potential errors.

• Default Behavior: As soon as you execute wget -b <URL>, your terminal will display a message like Continuing in background, pid 12345. followed by Output will be written to ‘wget-log’.
• Log Accumulation: If you run multiple background downloads in the same directory, wget will sequentially number the log files (e.g., wget-log.1, wget-log.2) to prevent overwriting your previous download histories.

Monitoring Your Background Download

If you want to check the status of your download while it is running in the background, you can view the contents of the log file in real-time. The most effective way to do this is by using the tail command with the follow flag:

tail -f wget-log

This allows you to see the progress bar and download speed update dynamically without interrupting the process.

Changing the Default Output Locations

If you do not want your file or your log to land in your current working directory, you can control their destinations using specific command-line switches combined with the background flag.

• To change the log file destination: Use the -o (lowercase) flag to specify a custom log name and path.

wget -b -o /path/to/custom.log <URL>

• To change the downloaded file destination: Use the -P (uppercase) prefix flag to send the downloaded file to a specific directory.

wget -b -P /home/user/downloads/ <URL>