[ Thanks to ashokgelal for this link. ]
"3. Repeat the last executed command $ !! When is this useful? If you are writing a shell script and want to execute a command twice. Another case where it comes handy is you forgot to add something in front of a long command such as apt-get install foo foo1 foo2 foo3 foo4 foo5."
$ !!
When is this useful? If you are writing a shell script and want to execute a command twice. Another case where it comes handy is you forgot to add something in front of a long command such as apt-get install foo foo1 foo2 foo3 foo4 foo5."
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