Comment by ibern

Here are some ways you could simplify some of the tasks in the article, saving on typing:

    cat data.csv | sed 's/"//g'

can be simplified by doing this instead:

    cat data.csv | tr d '"'

This awk command:

    cat sales.csv | awk -F',' '{print $1}' | sort | uniq

Can be replaced with a simpler (IMO) cut instead:

    cat sales.csv | cut -d , -f 1 | sort | uniq

When using head or tail like this:

    head -n 3

You don't need the -n:

    head -3

Also shout out to jq, xsv, and zsh (extended glob), all nice complements to the typical command line utils.