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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
Bash's history expansion character, "!", has many features, including "!:" for choosing a specific argument (or range of arguments) from the history. The gist is any number after !: is the number of the argument you want, with !:1 being the first argument and !:0 being the command. See the sample output for a few examples. For full details search for "^HISTORY EXPANSION" in the bash(1) man page.
Note that this version improves on the previous function in that it handles arguments that include whitespace correctly.
Seems obvious, but other seemingly simple ways to use it don't work:
-bash: !whammy: event not found
with the slash :(
you can also do any combinations of quotes for a complex string:
echo "It's great to be able to use a bang ("'!'") in a command"'!'
It's great to be able to use a bang (!) in a command!