If you are reading the synopsis of a command from a man page, then items in square [] brackets are:

If you are reading the synopsis of a command from a man page, then items in square [] brackets are:Category: Linux EssentialsIf you are reading the synopsis of a command from a man page, then items in square [] brackets are:
Linux Questions Staff asked 1 year ago

If you are reading the synopsis of a command from a man page, then items in square [] brackets are:

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