wget -m -k -K -E https://example.com/

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// -m -- this turns on options that help Wget mirror the website.

// -k -- this converts links within the pages so that they can be viewed locally.

// -K -- this backs up the original downloaded files so that you have both the original files and the copies with the converted links. The original files will have .orig appended to the filenames.

// -E-- this converts the file extensions of web pages to .html so that the files can be easily viewed in a browser.