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bitburner-src/markdown/bitburner.ns.fileexists.md
Michael Taylor dcd2f33f7c CODEBASE: Update api-documentor and api-extractor (#2320)
* Update api-documentor and api-extractor. #1566 follow-up.

I have verified that the HTML/markdown table generation bug in
[#4878](https://github.com/microsoft/rushstack/issues/4878) in rushstack
for api-documentor has been fixed as per rushstack#5256. The testcase
[repro](https://github.com/catloversg/api-documenter-bug-pr-4578) now
produces the correct expected output.

I have confirmed that the generated output in bitburner from
`npm run doc` now generated HTML tables, and correctly inserts
a blank line between the </table> and the follow line (e.g. Returns).

Stylisticly it could use some whitespace, but it is correctly rendered.

This commit is only the updated packages, not the updated generated
documentation. I assume that is automatically generated by the GitHub
workflow.

* Follow up to 5f732a6f35, include `npm run doc` changed docs.

* Add missing license info

* Fix React warning

---------

Co-authored-by: CatLover <152669316+catloversg@users.noreply.github.com>
2025-09-26 14:52:39 -07:00

1.4 KiB

Home > bitburner > NS > fileExists

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) Hostname/IP 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");