wget Command in Linux (Syntax, Examples, Cheat Sheet + Interview Questions)

Looking for wget command syntax, examples, or interview questions?

This guide covers everything from basic wget usage to advanced options, including a quick cheat sheet, real-world scenarios, and commonly asked interview questions to help you master wget in Linux.

wget command - Quick Cheat Sheet

wget command syntax

The basic syntax of the wget command in Linux is:

wget [options] [URL]

• wget → command used to download files from the web
• [options] → flags to control behavior (output, retries, speed, etc.)
• [URL] → the file or website location to download

Example:

wget https://example.com/file.zip

This downloads the file to the current directory.

wget command examples

Download a single file using wget

Downloads file to current directory.

wget https://example.com/file.zip

Download file with custom name (-O)

wget -O myfile.zip https://example.com/file.zip

Saves file as myfile.zip.

Download to specific directory (-P)

Downloads file into specified directory.

wget -P /home/user/downloads https://example.com/file.zip

Download multiple files using list (-i)

Create a file urls.txt:

https://example.com/file1.zip
https://example.com/file2.zip

Run:

wget -i urls.txt

Downloads all files listed.

Download files silently (hide progress)

wget -q https://example.com/file.zip

• -q → quiet mode (no output)

For logging instead:

wget -o log.txt https://example.com/file.zip

Combine wget with unzip in one command

wget https://example.com/file.zip && unzip file.zip

• Downloads file
• Immediately extracts it

Alternative (auto naming):

wget -O temp.zip https://example.com/file.zip && unzip temp.zip

wget in Linux (Real-world usage scenarios)

Resume interrupted downloads (wget retry and -c)

If a download is interrupted due to network issues, you can resume it using the -c option:

wget -c https://example.com/largefile.zip

• Continues downloading from where it stopped
• Useful for large files or unstable connections

Limit download speed and bandwidth control

To avoid consuming full bandwidth, limit the download speed:

wget --limit-rate=500k https://example.com/file.zip

• 500k → limits speed to 500 KB/s
• Can also use m for MB (e.g., 2m)

Run wget in background (nohup, &)

Run downloads in the background so they continue after terminal is closed:

Using &:

wget https://example.com/file.zip &

Using nohup:

nohup wget https://example.com/file.zip &

• nohup ensures process continues even after logout
• Output is saved in nohup.out

Retry failed downloads automatically

By default, wget retries failed downloads. You can customize retries:

wget --tries=10 https://example.com/file.zip

Set infinite retries:

wget --tries=0 https://example.com/file.zip

Add delay between retries:

wget --wait=5 --tries=10 https://example.com/file.zip

Download files with timestamping (avoid duplicates)

Avoid re-downloading unchanged files using timestamping:

wget -N https://example.com/file.zip

• Downloads only if remote file is newer
• Useful for syncing files or scripts

Advanced wget usage and options

Recursive download and website mirroring

Download entire websites using recursive mode:

wget -r https://example.com

For full mirroring:

wget -m https://example.com

• -r → recursive download
• -m → mirror mode (includes recursion + timestamping)

Limit recursion depth and file types

Control how deep wget should crawl:

wget -r -l 2 https://example.com

• -l 2 → limit depth to 2 levels

Download only specific file types:

wget -r -A .pdf https://example.com

• -A → accept only matching extensions

Download entire directory or website

Download a directory listing:

wget -r -np https://example.com/files/

• -np → no parent (stay within directory)

Exclude specific files and directories

Exclude unwanted file types:

wget -r -R .jpg,.png https://example.com

Exclude directories:

wget -r --exclude-directories=images,css https://example.com

Control directory structure and output

Avoid creating nested directories:

wget -r -nd https://example.com

• -nd → no directories (flat structure)

Customize directory structure:

wget -r --cut-dirs=2 https://example.com/path/to/files/

• Removes first 2 directory levels

Save all files to a specific directory:

wget -r -P /home/user/downloads https://example.com

wget command with authentication and security

Download files with username and password

You can authenticate while downloading files using HTTP/FTP credentials:

wget --user=username --password=password https://example.com/file.zip

For FTP:

wget ftp://username:password@example.com/file.zip

For better security (avoid exposing password in history), use:

wget --ask-password --user=username https://example.com/file.zip

Use wget with cookies and session handling

Useful for downloading content behind login sessions.

Save cookies:

wget --save-cookies cookies.txt --post-data "username=user&password=pass" https://example.com/login

Use cookies:

wget --load-cookies cookies.txt https://example.com/protected-file.zip

Keep session cookies:

wget --keep-session-cookies --save-cookies cookies.txt https://example.com

Ignore SSL certificate errors (when needed)

If SSL certificate validation fails:

wget --no-check-certificate https://example.com/file.zip

• Useful for self-signed certificates
• Not recommended for production (security risk)

Use wget with headers and tokens

Add custom headers (e.g., API tokens):

wget --header="Authorization: Bearer YOUR_TOKEN" https://api.example.com/data

Multiple headers:

wget --header="Header1: value1" --header="Header2: value2" https://example.com

wget configuration and customization

Understanding wgetrc configuration file

wgetrc is a configuration file used to define default settings.

Example:

user_agent = MyCustomAgent
wait = 5
limit_rate = 200k

This avoids repeating options in every command.

Global vs user wgetrc settings

• Global config:

/etc/wgetrc

• User config:

~/.wgetrc

User config overrides global settings.

Customize default behavior of wget

Example customizations in ~/.wgetrc:

continue = on
tries = 5
timeout = 30

Now wget will:

• resume downloads automatically
• retry 5 times
• timeout after 30 seconds

wget vs curl

Key differences between wget and curl

When to use wget vs curl

Use wget when:

• Downloading files
• Mirroring websites
• Automating downloads

Use curl when:

• Calling APIs
• Sending POST/PUT requests
• Debugging HTTP requests

Performance and use case comparison

• wget is optimized for bulk downloads and automation
• curl is optimized for data transfer and API interaction

Example (API request using curl):

curl -X GET https://api.example.com/data

Example (file download using wget):

wget https://example.com/file.zip

wget interview questions and answers

Basic wget interview questions

1. What is wget in Linux?
wget is a command-line utility used to download files from the internet using protocols like HTTP, HTTPS, and FTP.

2. What is the basic syntax of wget?

wget [options] [URL]

3. How do you download a file using wget?

wget https://example.com/file.zip

4. Which option is used to resume downloads?

wget -c https://example.com/file.zip

5. How do you download a file silently?

wget -q https://example.com/file.zip

Intermediate wget questions with answers

1. How do you download multiple files using wget?

wget -i urls.txt

2. How do you save a file with a different name?

wget -O newname.zip https://example.com/file.zip

3. How do you limit download speed?

wget --limit-rate=500k https://example.com/file.zip

4. How do you retry failed downloads?

wget --tries=10 https://example.com/file.zip

5. How do you download files in the background?

wget https://example.com/file.zip &

Advanced wget scenario-based questions

1. How do you mirror an entire website?

wget -m https://example.com

2. How do you download only specific file types (e.g., PDFs)?

wget -r -A .pdf https://example.com

3. How do you exclude certain file types?

wget -r -R .jpg,.png https://example.com

4. How do you use authentication with wget?

wget --user=username --password=password https://example.com/file.zip

5. How do you pass headers (e.g., API tokens)?

wget --header="Authorization: Bearer TOKEN" https://api.example.com/data

Real-world troubleshooting questions

1. Why is wget failing with SSL error?
Use:

wget --no-check-certificate https://example.com

2. Why is wget not resuming download?
Ensure:

• Server supports partial downloads
• Use -c option

3. Why is download very slow?
Possible reasons:

• Server-side throttling
• Network issues
• Use --limit-rate or check bandwidth

4. How to debug wget issues?

wget -d https://example.com/file.zip

5. How to handle redirects properly?
Wget follows redirects by default, but ensure URL is correct and accessible.

Conclusion

The wget command is one of the most powerful tools in Linux for downloading files, automating tasks, and handling large-scale data transfers. From basic file downloads to advanced use cases like website mirroring and authenticated requests, wget provides flexibility and reliability. By understanding its syntax, options, and real-world scenarios, you can significantly improve your productivity in Linux environments.

Official Documentation

For complete reference and advanced usage, refer to the official GNU documentation:

• GNU Wget Official Manual
• Wget Linux Man Page Documentation

You can also access documentation directly from your system using man wget.