====== Split&&Concat file ======

For txt files, you can split a file by the dedicated lines:
  split -l 300 large_file.txt new_file_prefix
  
For bin files, you can split a file by the dedicated size:
  split -b 10m large_file.bin new_file_prefix
  
And the you can use cat to concat the small files:
  cat small_files* > large_file
  
This command is really powerful and convenience, because the network cloud disk doesn't support upload a huge file, so you can split it and then upload.