pipeview (pv)

pipeview (pv) shows transfer speed and/or transfer progress through a Unix pipe.

pv works like cat. For example,

# no output
cat file > other_file

# Display progress
pv file > other_file  

# Showing both compression progress and speed
pv file | gzip > file.gz
# Sandwich form, showing speed without progress
cat file | pv | gzip > file.gz

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