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split file into chunks

Split file into 16 MB chunks (useful for emails):

split -b 16M my.tgz my.tgz.part-

You can also do it by number of lines with -l.

Be careful not to pass a number like 16 to the -b parameter, otherwise it will split your file into millions of 16 byte files. To recover from that:

for x in my.tgz.part-* ; do rm $x ; done