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After doing “npm install forever” in a VirtualBox instance you may get an error like the following. This is caused by running the install from a folder shared with the host machine. Certain file operations fail when crossing the machine/file system boundary in VirtualBox. npm ERR! error rolling back [email protected] Error: UNKNOWN, unlink '/vagrant/node_modules/forever/node_modules/winston/docs/winston/transports.html' npm [...] Read More...