bitburner-src/markdown/bitburner.ns.fileexists.md

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NS.fileExists() method

Check if a file exists.

Signature:

fileExists(filename: string, host?: string): boolean;

Parameters

Parameter	Type	Description
filename	string	Filename of file to check.
host	string	(Optional) Host of target server. Optional, defaults to the server the script is running on.

Returns:

boolean

True if specified file exists, and false otherwise.

Remarks

RAM cost: 0.1 GB

Returns a boolean indicating whether the specified file exists on the target server. The filename for programs is case-insensitive, other file types are case-sensitive. For example, fileExists(“brutessh.exe”) will work fine, even though the actual program is named 'BruteSSH.exe'.

Example

// The function call will return true if the script named foo.js exists on the foodnstuff server, and false otherwise.
ns.fileExists("foo.js", "foodnstuff");

// The function call will return true if the current server contains the FTPCrack.exe program, and false otherwise.
ns.fileExists("ftpcrack.exe");