| Other names | [ |
|---|---|
| Developer(s) | Various open-source and commercial developers |
| Written in | C |
| Operating system | Unix, Unix-like, Plan 9, IBM i |
| Platform | Cross-platform |
| Type | Command |
| License | coreutils: GPLv3+ Plan 9: MIT License |
test is a command-line utility found in Unix, Plan 9, and Unix-like operating systems that evaluates conditional expressions. test was turned into a shell builtin command in 1981 with UNIX System III and at the same time made available under the alternate name [.[1]