Hello Everyone,
I am currently stuying the part about devices directories in Linux system, and i thought ill make a list of all Device directories to refer back to when needed.
I made the below table listing all essential devices in Linux that you need to know about, while containig the category of these devices, naming, directory and the type of variable they use in their naming (replacing the * with the corresponding numrics or letters. e,g: /dev/sd* > /dev/sda, /dev/sdb, /dev/sdc... and so on).
Thought that i should share this list, and i hope this can be useful to anyone who's looking for a simplified listing of all devices and having them in one place.
| Category | Device name | Directory | * Type |
|---|---|---|---|
| Storage | Hard Disk | /dev/sd* | a, b, c... |
| Storage | Hard Disk - Partitioning | /dev/sda* | 1, 2, 3... (no 0, starts from 1) |
| Storage | Virtual Disk | /dev/vd* | a, b, c... |
| Storage | Xen Virtual Disk | /dev/xvd* | a, b, c... |
| Storage | Non-Volatile Memory Express (NVME) | /dev/nvme* | 0, 1, 2... |
| Storage | Device Mapper | /dev/dm- SL to* /dev/mapper | 0, 1, 2... |
| Storage | CD & DVD (read only) | /dev/sr* | 0, 1, 2... |
| Storage | Generic SCSI (passthrough) | /dev/sg* | 0, 1, 2... |
| Storage | PATA (Parallel ATA) | /dev/hd* | a, b, c... |
| Storage | Loop Device | /dev/loop* | 1, 2, 3... |
| Terminal | Virtual Console | /dev/tty* | 0, 1, 2... |
| Terminal | Pseudoterminal (Master) | /dev/ptmx | N/A |
| Terminal | Pseudoterminal (Slave) | /dev/pts/* | 0, 1, 2... |
| Serial/Parallel Port | Serial Port: RS-232 (COM1) | /dev/ttyS* | 0, 1, 2... |
| Serial/Parallel Port | Serial Port: Plug-in USB Adapter | /dev/ttyUSB* & /dev/ttyACM* | 0, 1, 2... |
| Serial/Parallel Port | Parallel Port: Unidirectional | /dev/lp* | 0, 1, 2... |
| Serial/Parallel Port | Parallel Port: Bidirectional | /dev/parport* | 0, 1, 2... |
| Audio Device | Audio Device: Advanced Linux Sound Architecture (ALSA) | /dev/snd/* | N/A |
| Audio Device | Audio Device: Open Sound system (OSS) | /dev/dsp & /dev/audio | N/A |
| Pseudo Device | Null Device | /dev/null | N/A |
| Pseudo Device | Zero Device | /dev/zero | N/A |
| Pseudo Device | Random Number Generator | /dev/random & /dev/urandom | N/A |
| Pseudo Device | Full Device | /dev/full | N/A |
| Input | Input Event | /dev/input/event* | 0, 1, 2... |
| Input | Mouse | /dev/input/mouse* | 0, 1, 2... |
| Video/Graphics | Framebuffer | /dev/fb* | 0, 1, 2... |
| Video/Graphics | Video Capture | /dev/video* | 0, 1, 2... |
| Memory | Physical/Kernal Memory | /dev/mem & /dev/kmem | N/A |
| Flash Memory | Flash Memory | /dev/mtd* | 0, 1, 2... |
| Networking | Network Tunnel | /dev/net/tun | N/A |
| Networking | Syslog Socket | /dev/log | N/A |
| Misc Hardware | Watchdog Timer | /dev/watchdog | N/A |
| Misc Hardware | Real-Time Clock | /dev/rtc* | 0, 1, 2... |
(it might not be 100% correct since im still in the process of learning them, so please help me correct anything in case you found any mistake or things that i should add!! or ask questions, in that case i can also learn something new myself while looking things up)
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