Overview
wget-ssl is a powerful tool for downloading files from the web using HTTP, HTTPS, and FTP protocols. Its HTTPS support enables secure data transfer over encrypted connections. It is particularly useful for scripting and automated tasks.
Key Features
- Non-interactive download: Can run in the background
- HTTPS support: Secure connections via SSL/TLS
- Resumable downloads: Continues interrupted downloads
- Recursive downloading: Mirrors entire websites or parts
- Proxy support: Usable in various network environments
Key Options
wget-ssl offers a variety of options to finely control download behavior.
Basic Downloads
Security and Authentication
Recursive Downloads
Generated command:
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Description:
`wget-ssl` Executes the command.
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Usage Examples
Various examples of how to use wget-ssl.
Basic File Download
wget-ssl https://example.com/archive.zipDownloads a file from HTTPS to the current directory.
Save File with a Different Name
wget-ssl -O my_archive.zip https://example.com/archive.zipSaves the downloaded file as 'my_archive.zip'.
Resume an Interrupted Download
wget-ssl -c https://example.com/large_file.isoContinues downloading a large file that was previously interrupted.
Download in Background
wget-ssl -b https://example.com/very_large_archive.tar.gzDownloads a file in the background, allowing immediate use of the terminal. Progress is logged to 'wget-log'.
Download Without Certificate Check (Caution)
wget-ssl --no-check-certificate https://insecure.example.com/data.txtDownloads a file by skipping SSL/TLS certificate validation. This can be a security risk, so do not use it with untrusted sources.
Recursive Download of a Website to Depth 1
wget-ssl -r -l 1 https://example.com/docs/Downloads the page at the specified URL and files directly linked from it, up to one level deep. Useful for website mirroring.
Tips & Precautions
Tips and precautions to help you use wget-ssl more efficiently and securely.
Security Precautions
- The `--no-check-certificate` option increases security risks and should only be used on trusted servers or for testing purposes.
- While HTTPS ensures the security of data transmission, it does not guarantee the absence of malware in the downloaded file itself. Always verify the source.
Efficient Downloads
- For large file downloads, always use the `-c` (resume) option to avoid restarting from scratch if the download is interrupted due to network issues.
- When using background downloads (`-b`), it's recommended to use `nohup` or terminal multiplexers like `screen` or `tmux` to ensure downloads continue even if your terminal session ends.
- If you need to download multiple files, you can list the URLs in a file and use the `-i <file>` option.
Using Recursive Downloads (`-r`)
- The `-r` option is powerful for downloading entire websites, but it can place a heavy load on servers. Respect `robots.txt` files (avoid `-e robots=off`) and limit download depth using the `-l <depth>` option.
- To limit the types or sizes of files downloaded, you can use `--accept` or `--reject` options to download only specific extensions or exclude certain ones.
Difference Between wget and wget-ssl
- Standard wget: The `wget` command, available in most modern Linux distributions, typically includes SSL/TLS (HTTPS) support by default.
- wget-ssl: `wget-ssl` may refer to a version of `wget` with explicitly included SSL/TLS support in specific environments, or it might be a symbolic link to the general `wget` command. Functionally, it operates identically to the standard `wget` and ensures secure downloads over HTTPS.