'Archiving multiple files in Unix using tar and gzip

I have the requirement to archive multiple files keeping the original files using tar and gzip. I cannot take risks with the files I have.

For example, the files to be archived are:

ls
1.doc
2.doc
3.doc
4.xls
5.xls
6.xls

The expected output:

ls
1.doc
2.doc
3.doc
4.xls
5.xls
6.xls
archive.tar.gz

Where archive.tar.gz file contains all the doc and xls files.

unix gzip tar

Sources

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