ls command


Hi Guys i am new in YOCTO project. i have build images before and the images were included the "ls" and "clear" and all busybox commands. i do not know what happend now the image does not have anymore the "ls" or "clear" and all that commands and also there is a folder named && in the root directory ? What to do ?
Sorry if my question is stupid but i am just a new in Yocto and linux

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