The tag has no usage guidance.

learn more… | top users | synonyms

1
vote
1answer
19 views

Can't remove ttyS0 from /etc/securetty

Running RHEL6.6. Been trying to secure the system, and am having difficulty disabling root logins over the serial connection. My understanding is that I need to comment-out/remove the ttyS0 line, ...
0
votes
1answer
28 views

Is there any tool in linux which will help me specify baud rate which i need

I have tried gtkterm and a couple of other tools. None of them seem to support a baud rate which is higher than 115200. Could someone suggest some tools which will allow higher baud rates?
7
votes
5answers
4k views

resizable serial console window?

When using the serial console of my system I always end up with $COLUMNS=80 and $LINES=24. While I can change these variables manually it is somewhat annoying to do this any time when the client side ...
2
votes
0answers
37 views

How to assign different configuration for ttyS0 under different environments

I have a computer (let's call it as DevPC) that sometimes run Linux in native environment and that sometimes run Linux on Xen. I connect this computer to another computer (let's call it as MonitorPC) ...
7
votes
1answer
118 views

Why does 8250 UART driver not wake up TTY if more than 256 characters are pending?

What is the motivation of this if-condition in void serial8250_tx_chars(struct uart_8250_port *up)? if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); It has been ...
1
vote
0answers
60 views

Unable to get login prompt on /dev/ttyUSB0

I am attempting to connect a TI-89 graphing calculator as a serial terminal to a Raspberry Pi running the latest version of Raspbian. The calculator is emulating a PL2303 serial adapter at /dev/...
3
votes
0answers
34 views

DD-wrt serial messages [closed]

Since I recently bricked my WDR3600 by accidentally flashing wrong firmware with mdt I had to do some soldering to make serial work. Since the window to entering bootloader cmd was really short I ...
0
votes
1answer
72 views

Ctrl + Alt + Del and F keys Using Telnet

I only have serial access to a server, and I am trying to access its BIOS using telnet (it's not a direct serial, but a remote serial connection). My telnet certainly reaches the server, as I can ...
0
votes
0answers
64 views

No response on ttyAMA0 on ArchLinux

I am running ArchLinux on a Raspberry Pi 3. I am trying to connect over a serial cable with screen on a Mac El Captain using screen /dev/tty.usbserial 115200. I get the Grub boot messages and the ...
3
votes
2answers
2k views

terminate screen monitoring serial port

I'm using screen /dev/tty-MyDevice to look at traffic on my serial port. Pressing Ctrl+D doesn't cause the screen to terminate. How do I terminate it? Thanks
1
vote
1answer
122 views

How to programatically send break signal (Magic SysRq) through serial terminal

I have following setup - I have 2 computers connected by serial connection (null modem) emulating vt220. I'd like to send break signal (Magic SysRq) from shell script - is it possible without writing ...
3
votes
2answers
85 views

Redirect console to a serial port

I have a serial port /dev/ttyS2 that is connected to a supervisor. Normally, I use this line to send commands back and forth between CPU and supervisor. However, under some settings, I want to just ...
2
votes
1answer
121 views

How to readout unused serial pins (RTS, CTS, etc.)?

I have an interface for RS-232 communication. I need this interface for simple communication (no parity bit or flow control → TX, RX and ground) but now I have quite 4 pins unused (RTS, DTR, DCD/DSR, ...
4
votes
1answer
122 views

Find correct tty & tty settings

I managed to run pure Debian (debootstraped) ON my Android-based device. That means that my Nexus 5 runs a perfectly normal GNU/Linux system but with the CyanogenMod 11 Linux kernel (has some model-...
2
votes
0answers
122 views

Working /dev/ttyS0 but can't transfer binary (one serial but two drivers Com1/Com4)

I think it's a driver config issue, it works in winXP(dual boot) with intel drivers. I'm debugging via serial port from another machine, which works fine. The PC is a i5 dell Optiplex 790 running ...
0
votes
0answers
68 views

QEMU kernel panic to serial port

I'm working with kernel 2.6.13.1 on Debian 6 with QEMU/KVM for a class. The kernel, once installed, panics on boot. The curses interface to qemu doesn't seem to allow scrollback to view the entire ...
1
vote
1answer
28 views

access to ttyusb0 as normal user

I am trying to access a serial device, which is attached as: "/dev/ttyUSB0". crw-rw---- 1 root dialout 188, 0 Nov 29 15:45 ttyUSB0 For that I created a new udev rule: SUBSYSTEM=="tty", ATTR{...
1
vote
1answer
52 views

Configuring Getty for hardware terminal

I am looking to configure a serial line for the following: 9600 Baud Word Length: 8BIT Parity: Mark XON/XOFF On I can't seem to locate the details on the "Parity Mark" part so far on my searches ...
33
votes
9answers
142k views

How to connect to a serial port as simple as using SSH?

Is there a way to connect to a serial terminal just as you would do with SSH? There must be a simpler way than tools such as Minicom, like this $ serial /dev/ttyS0 I know I can cat the output ...
-2
votes
1answer
265 views

Virtualbox and telnet

With the latest VirtualBox it is possible to set a tcp serial. I have set port 2231 and with telnet localhost 2231, the login prompt appears on my old Unix system. The problems are: passwords are ...
9
votes
4answers
11k views

How do I connect a serial terminal to a KVM instance?

Perhaps I'm misunderstanding what KVM is capable of, but the ability to add/remove hardware on the VM seems to imply I can add a serial port that then acts as a terminal. So, my questions are: ...
1
vote
1answer
119 views

Connect to serial, issue a command, read result, capture it and exit

I have some device, connected to serial port. Actually, it is Arduino based temperature sensor. I wish to write a script, which will connect to serial port, send a command to device, receive it's ...
1
vote
2answers
1k views

How to change (increase) number of lines in screen?

Connecting from Windows to Linux (CentOS 5.4) using PuTTY. Console set at 140col 60 lines. Not much else changed from default. Connection is via serial cable to the box. On Linux, installed and ...
3
votes
1answer
159 views

Serial File Transfer without lrzsz

I have a device running Raspian, that does not have the lrzsz package installed on it. I only have a serial port to the device, and can connect to the device using screen or minicom, but unfortunately ...
0
votes
0answers
96 views

Getty crashes when I attempt to open a serial terminal

I started a getty console on my serial port on a raspberry pi compute module running Raspian by configuring the following line in /boot/cmdline.txt: dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=...
1
vote
1answer
996 views

Sending serial commands with echo vs screen session

I have a small LED matrix controlled by a display driver that accepts serial commands to update the display. I'm successfully controlling it via node with the node serial package, however I'd like to ...
1
vote
1answer
629 views

how to use ser2net control port

man ser2net says that by running ser2net with a -p flag I can execute a number of commands. If I run ser2net -p 12345 and, then, lsof -i :12345, I can see the service on that port. How would I, for ...
0
votes
1answer
284 views

Using `minicom` not able to access the root file system

I am trying to use minicom for my serial cable communication to the target but I am not able to access the / of my remote device.I tried setting up ttyXX for minicom using sudo minicom -s but still I ...
1
vote
1answer
434 views

VT100 terminal emulation to use with a Java-based 8-bit computer emulator

I'm successfully using GNU Screen as serial terminal to "talk" to my Altair 8800 clone (http://altairclone.com/) using serial line. The command I use is: screen -istrip /dev/ttyUSB0 Screen does the ...
2
votes
1answer
468 views

How to get kernel messages on serial console on a systemd system?

I'm trying to set up an A20-OLinuXino-LIME2 as a headless fileserver with a Debian 8 image from Igor Pečovnik's builds. I would like the system to output its kernel messages to the serial console (...
2
votes
1answer
352 views

FreeBSD gettytab configuration

I have a serial port on my system which is named cuau3 under FreeBSD. I want to change the properties of this port, I can change the device's speed using /etc/ttys and /etc/gettytab files, but I can't ...
1
vote
1answer
245 views

How to free a serial port owned by Getty

I have machines in pairs. They're connected to each other by a null modem serial cable. These machines sometimes go down, and the only way to diagnose them is through that cable, using the other node ...
1
vote
1answer
83 views

Available console solution for a physical machine running OpenBSD?

If we have a physical server running OpenBSD, what are the available remote console solutions for it? Are there any unique methods because it's an OpenBSD? Console of course means if there is no ...
2
votes
0answers
693 views

cat /dev/ttyS0 Input/output error

I created infrared receiver as in LIRC manual (http://www.lirc.org/receivers.html). And tested it on windows using program called Terminal. When I switched on RTS pin DCD pin was also switched on ...
1
vote
1answer
285 views

_Robust_ bluetooth serial port console/tty

I've managed to create and connect to a console via bluetooth, as is described in many Q&A's FAQs Guides etc found via a google search. Briefly, in sudo mode, /usr/sbin/hciconfig hci0 piscan /...
4
votes
1answer
275 views

List serial devices on FreeBSD

On FreeBSD, I'm looking for a way to list serial communication devices. The computer has two of them installed: An on-board serial console (ttyS0), and an internal analog modem. I can find out about ...
1
vote
1answer
165 views

problem with U-boot while flashing Linux in sd-card

Please help as it is immense necessary for a project which is to be evaluated coming week. Also, I am very new to this and unable to find help from existing contents available on the Internet. While ...
3
votes
1answer
1k views

What is the complementary command to 'rx' for xmodem transfer?

I have an installation of busybox on an embedded linux system that comes with a great little utility called rx: rx FILE Receive a file using the xmodem protocol This is perfect for transferring ...
3
votes
1answer
435 views

Output shutdown messages to multiple consoles

I have configured my system to direct console output on boot to serial and vga using kernel parameters. Serial is the last argument in the kernel parameters and will be the default used for /dev/...
4
votes
1answer
3k views

No login prompt on serial console

I have connected a USB-to-serial cable from OS X to a Banana Pi board running Arch Linux ARM, distributed by Lemaker. The connection itself works well - I see all the boot messages on startup, I can ...
1
vote
1answer
122 views

login using serial port in Linux

I have a slackware machine and I'd like to have a serial console on it. I have a RJ45 console on my hardware. I can now only get output on the console and cannot give any input back to the device. ...
2
votes
1answer
2k views

Terminal server (ser2net) to configure new HP procurve switch

Switch: HP ProCurve 2910AL-48G - J9147A This switch is brand new straight from HP. Anyone familiar with ser2net for creating a terminal server to connect from usb>serial>console port on a HP ...
2
votes
1answer
5k views

Unable to receive data from /dev/ttyACM0 device [closed]

Using USB based CAN device connected on AR9350 mips processor based Atheros reference board with linux kernel 2.6.32.61. Which is coming up as /dev/ttyACM0 device. In which Able to transmit data from ...
3
votes
1answer
272 views

Linux console: only kernel messages are printed

My Linux system is built by Buildroot and runs on a Raspberry Pi. I use a Usb to TTL Serial cable to get a console. Here comes cmdline.txt dwc_otg.fiq_fix_enable=1 sdhci-bcm2708.sync_after_dma=0 ...
9
votes
2answers
9k views

How to change the width of remote serial console?

I followed this tutorial and now I'm able to connect to serial line. Now I want to change the width of terminal. How can I do this by using screen or minicom or something else?
1
vote
1answer
311 views

Serial communication not working in both directions

I am working with a SOM mounted on a carrier board running Ubuntu 14.04 with the generic 3.13 kernel. While testing out the peripherals, I hit a problem with serial communication. Basically, I can ...
1
vote
1answer
165 views

unable to establish communication using grabserial

I have use teraterm in past and it works fine. I can see log messages coming from my board. Ultimately I reach the login prompt where I enter my login and password for OS running on my board. Now ...
6
votes
2answers
1k views

Console port problems on Fedora 15

I've looked under every search term on google I can think of and can't seem to find anything that works. I just switched from Windows 7 to Fedora 15 on my PC. I need use of the console port to ...
2
votes
1answer
167 views

Should IP tables rules affect a serial port on Linux

I'm trying to setup some iptables rules on my embedded Debian Linux system, using a serial console I entered this: root@ts7600-47aad3:~# iptables -F root@ts7600-47aad3:~# iptables -P INPUT DROP ...
2
votes
2answers
4k views

how to re-enable input on a serial console

I have an old router which runs Linux and I'd like to have a serial console on. This used to work fine, but after a firmware update, I can now only get output on the console and cannot give any input ...