Quote Originally Posted by TrumpetMan258
I backed up my home directory, but when I try to open the archive, I get this error message:

I know that I typed the backup command into ternimal correctly. How come I can't open the archive?
Something went wrong with the creation or copying of the backup somewhere/how.

It is telling you it cannot read the file because it is shorter than it should be.

Did you get any errors whilst making the backup?

Is the file over 2Gb? if so what filesystem was it put on/copied to? IIRC FAT32 has a filesize limit of 2Gb/file.