| Abbreviation | Definition |
|---|---|
| pwd | Print Work Directory |
| qdaemon | queue daemon |
| r... | remote (e. g. rsh = remote shell) |
| ranlib | create RANdom access LIBrary |
| rcp | Remote CoPy |
| RED | Restricted EDitor |
| RETR | RETRIEVE (FTP) |
| rlogin | remote login |
| rm | remove |
| rmail | restricted mail |
| rmdel | remove delta |
| rmt | remote magnetic tape |
| roff | Run-OFF |
| rsh | remote shell or restricted shell |
| RSYNC | Remote Sync |
| rz | Receive Z-modem |
| scp | secure copy |
| sdb | symbolic debugger |
| sdb | Symbolic De-Bugger |
| sed | Stream EDitor |