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Fun with Linux Commands

By

[ 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.”

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