17.20 Redo Last Command

$ !!:p                  # Print last command

Suppose we have a complex previous perl command. We want to repeat it but for a different file.

$ perl -pi.bak -e 's|^\*\*(\d{8})\*\* |`r#cite_date($1)` |' cha_110_*.Rmd ; meld cha_110_*.Rmd.bak cha_110_*.Rmd
$ !perl:gs/110/140/
perl -pi.bak -e 's|^\*\*(\d{8})\*\* |`r#cite_date($1)` |' cha_140_*.Rmd ; meld cha_140_*.Rmd.bak cha_140_*.Rmd

An alternative is:

$ ^110^140^

And another:

$ fc -s 110=140


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