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They tend to show up as ttys and be easily usable to get a linux login console after the kernel has booted. You're not going to be using them to interact with (
by Nursie 4y ago
They tend to show up as ttys and be easily usable to get a linux login console after the kernel has booted. You're not going to be using them to interact with (say) the u-boot bootloader on an embedded board, but if your machine has disappeared off the network and you're pretty sure the kernel is at least booting, you can sometimes use one of these to figure out wtf has gone wrong.
- snvzz 4y agoYes, even if USB attached, a serial port is definitely useful to get a console when network does not work. What I meant is that it will likely not help debugging when there's kernel or hardware issues.
- johnwalkr 4y agoThat’s true but it’s a step up in your game from attaching a keyboard and monitor at first. You can also do this over Bluetooth pretty easily.