以指定大小分割 split -b 100M [文件] [分割文件名头]
split -b 100M [文件] [分割文件名头]
以行数分割 split -l 100 [文件] [分割文件名头]
split -l 100 [文件] [分割文件名头]
合并 cat [分割文件名头*] > [文件]
cat [分割文件名头*] > [文件]