# which command

The which BASIC program displays the
implementation being used, the software serial number, the system
ID number, the release level, and UNIX specific system information.

## Syntax

```
which {(option}
```

## Parameter(s)

| option | a | Displays highest ABS patch level loaded on the system. |
| --- | --- | --- |
| c | Displays levels for each component of the system. | |
| d | When used with the c option, displays release dates for each component. | |
| p | Outputs to printer. | |
| x | Outputs the data in a program-friendly format. | |
| z | Displays release implementation and date only. | |
This command displays the version of the elements used
to create the D3 operating system. The display includes:

| Implementation | General platform implementation. |
| --- | --- |
| Software Serial Number | Serial number. |
| System ID Number | System ID number. |
| Release | Specific platform information. |
| UNIX Information | Displays the system name, configuration file name, and UNIX information. For example: Linux;prod:LINUX;2.4.2-2smp;#1 SMP Sun Apr 8 20:2 |

## Example(s)

```
which cad

 System Release Information
 ==========================
D3 Release Version 7.2.1.LINUX
Most recent mload into boot abs performed at 17:50:09 on 20 Feb 2003.
Implementation. . . . . . 6386
Software Serial Number. . 11030966
System ID Number . . . . 30162545
Release . . . . . . . . . D3/UNIX: LINUX
Unix Information. . . . . Linux;prod:LINUX;2.4.2-2smp;#1 SMP Sun Apr 8 20:2
1:34 EDT 2001;07EE7316
Boot Monitor. . . . . . . 7.2.1.M6; 10 Jan 2002
Boot ABS. . . . . . . . . 7.2.1.A8; 09 Jan 2002
Boot ABS Data File. . . . 7.2.1.A8; 09 Jan 2002
System Data Files . . . . 7.2.1.D8; 09 Jan 2002
FlashBASIC Revision . . . 7.2.1.F5; 27 Jul 2001
SQL Revision. . . . . . . 7.2.1.S4; 26 Jul 2001
ABS Patch Level . . . . . 7.2.1.A78; 29 Mar 2002
```

## See also

- [c/release](https://d3codex.com/attributedefiningitem/c-release/)
- [what command](https://d3codex.com/tcl/what-command/)
- [who command](https://d3codex.com/tcl/who-command/)

---
Source: https://d3codex.com/tcl/which-command/ - part of the D3Codex reference.