[Home](./index.md) > [bitburner](./bitburner.md) > [NS](./bitburner.ns.md) > [ls](./bitburner.ns.ls.md) ## NS.ls() method Returns an array with the filenames of all files on the specified server (as strings). The returned array is sorted in alphabetic order. Signature: ```typescript ls(host: string, grep?: string): string[]; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | host | string | Host or IP of the target server. | | grep | string | A substring to search for in the filename. | Returns: string\[\] Array with the filenames of all files on the specified server. ## Remarks RAM cost: 0.2 GB