Unix list serial ports

Add a comment. Active Oldest Votes. You can see the initialization of a few serial ports: ttyS0 , ttyS1 , ttyS4 , ttyS5. Improve this answer. What if I don't see any device in the dmesg output? From what I understand, dmesg should have a message about assigning irq to a serial device. And if it didn't, I'd assume some hardware problem.

That's just an assumption, and might be wrong, but if I'd debug such a problem, I'd start research with the idea in mind that serial port should've been initialized. Since I move from machine to machine I have defined an alias to show me the serial ports on this machine.

It works on Ubuntu family systems with systemd. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Add a comment. Active Oldest Votes. Improve this answer. Do you really think, this is a serial device? This is much much harder to find. Great tip! Unfortunately I don't think this will show built in serial ports, only USB serial ports seen by udev when attached.

I did as above and it worked. The complete source for enumerating the serialports looks like this. Additions are welcome. Lone link is considered a poor answer since it is meaningless by itself and target resource is not guaranteed to be alive in the future. Please try to include at least summary of information you are linking to. Thanks to Soren for this, even we know the APIs and some idea on it but you did really good Soren, thanks again.

I found dmesg grep tty doing the job. RealHuman75 RealHuman75 1 1 silver badge 2 2 bronze badges. You'll find entries for drivers and line disciplines in this directory, as shown in Table Yes, that seems to be working. However, this solution requires me to read a text file and parse it. I wonder if there's a better away, i. I looked at the code and it has the flaw I explain in my question at the end as it has to open the device, which may already lead to a connection attempt - which in turn is not good.

But then, maybe Linux drivers are smarter than current OSX driver when it comes to bluetooth support, as they won't open a connection right away? Who knows? Maybe I should start a new question to clarify that specifically. If it turns out that that's fine, then I can accept your answer here as well. Interface hwmanager, 'org. Too bad HAL was removed from Ubuntu after Does anyone know if there is a replacement to the above? EX: find. Community Bot 1 1 1 silver badge.

Apparently this is distro-dependent. By default, any port will remain closed unless an app is using it.

In Linux, there are multiple tools available for the task. Most of them come built-in in any Linux distro.

Learning which ports are currently open can be useful in various scenarios. An open port may also be a strong indication of intrusion in the network.

The netstat tool is a utility for displaying network connections for TCP, routing tables, and various network interfaces. It also offers network protocol statistics. By using netstat, we can list all the open ports of the system.

The lsof command is to list open files. However, it can also be used for displaying the open ports. It can report all the open ports in the system. To list the open TCP ports, run the following nmap command.