when we need use bundle:lock and unlock on rails3

i rember in old rails there is a freeze ,in rails3 it seems dispared

also i was confused me when need us开发者_JAVA技巧e bundle:lock and unlock?

help someone could give a help

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You don't. From bundle --help

These commands are obsolete and should no longer be used
o   bundle lock
o   bundle unlock

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Check out the Bundler documentation.