I have a macbook air and have been deleting icons, like safari, how do I retreive lost shortcuts?                        do I get them back?

Hi, I have a Macbook Air, and I have been deleting icons, from the bottom of the screen like safari, how do I get them back?

You can reset your dock to the defaults by copying this text, pasting it into the Terminal app, and hitting Return. You can find the Terminal App in the Applications/Utilities folder.
rm ~/Library/Preferences/com.apple.dock.db
rm ~/Library/Preferences/com.apple.dock.plist
killall Dock

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