commandliners

Sometimes you need split a file. For example, to send them attached to an email. For this, you can use the split command.

$ split -b 1m big_file file_part_

In the example, the big_file size is 10MB, the -b option split the file in 1MB pieces, and the file_part_ is the name given to the different parts.

$ ls file_part_*
file_part_aa    file_part_ac    file_part_ae    file_part_ag    file_part_ai
file_part_ab    file_part_ad    file_part_af    file_part_ah    file_part_aj

All the files are 1MB long.

For joining all the parts you can use the cat command.

cat file_part_* >> new_file

And new_file will be the same file as big_file.