How to split and merge files in Linux

# File segmentation:

Dd if = source of = target.1 bs = 1 M count = 10

Dd if = source of = target.2 bs = 1 M skip = 10

# The source file is divided into target.1 and target.2 files,

# Where target.1 is the first 10 MB of the source

# Target.2 is the part of the source minus 10 m

# Merge:

Cat target.1 target.2> othersource

# In this way, target.1 target.2 is merged into the same file othersource.

# Othersource has the same content as the original source.

# If you want to replace the values of target.1 and target.2, run the following command:

Cat target.2> othersource

# Or

Cp target.2 othersource

# Then execute

Cat target.1> othersource

# In this way, target.1 is appended to the content of target.2 in othersource.