If you had more money, you could trade futures, which are mentioned in the article. If you sell the future before the date of delivery, then you never have to deal with the physical aspect of the commodity. There are lots of online brokerages you can use for this, for example, E*Trade and TradeStation. But they have higher minimums than $1000.
With $1000, you could trade ETFs, for example USO [0]. The account minimums for ETFs are lower. If you look at what's inside USO [1], it's basically a wrapper for a future (NYMEX WTI Crude Oil CL).
From https://www.gnu.org/software/grep/manual/grep.html#Introduct...: "Since newline is also a separator for the list of patterns, there is no way to match newline characters in a text."