Tar archiving that takes input from a list of files

Yes:

tar -cvf allfiles.tar -T mylist.txt

linux unix archive tar

Assuming GNU tar (as this is Linux), the -T or --files-from option is what you want.

linux unix archive tar

You can also pipe in the file names which might be useful:

find /path/to/files -name \*.txt | tar -cvf allfiles.tar -T -

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