Questions tagged [getty]
The getty tag has no usage guidance.
81
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What is the equivalent of "clear line con 0"?
What is the equivalent of clear line con 0 in Cisco IOS?
I'm using serial-getty@ttyS0.
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4
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1
answer
480
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job control doesn't work when I try to set up getty over serial
I am trying to set up getty to log in over serial (mainly as an experiment).
With almost any configuration, the same thing happens. If my default shell is bash, I get this message after I log in:
-...
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44
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What is the source of this tty console output?
I'm making a kiosk system using Armbian on an orangepi zero 3. The kiosk is a on a local server that I connect to using chromium browser launched from my ~/.bash_profile. Before chromium-browser ...
2
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1
answer
769
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Debian VM doesn’t boot on QEMU with "console=hvc0" kernel parameter
I’m running virtual linux machine (debian12) on QEMU with -device virtconsole argument. That argument adds /dev/hvcX device nodes to VM. QEMU can connect that device to unix socket on host. If i pass “...
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1
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[email protected] FAILED - Autologin only shows on TTY1 a flashing _
I'm working on a minecraft server with OS Ubuntu server 20.04
So far they haven't given me any problems (it's fantastic!), I know some things about linux (some don't exaggerate)
Until something came ...
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1
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206
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Dumb terminal agetty keyboard layout filter
I recently acquired an old Heathkit dumb terminal, and I would like to get it working with the colemak keyboard layout. Because the terminal sends ascii codes directly over serial, I don't believe ...
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1
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1
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2k
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Relationship between framebuffer and a tty
A framebuffer is a device file which allows for a simplified interface to the screen.
For example running the below code on a RaspberryPi with a HDMI display connected:
cat /dev/urandom > /dev/fb1
...
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2
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2
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1k
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No login prompt from Getty over serial console
My Ubuntu 20.04 system has a serial port over which I would like to provide console access.
I can confirm that I can communicate over the serial port with
sudo picocom -b 115200 /dev/ttyS5
I start ...
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0
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1
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52
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Emacs escaping getty
I create two virtual serials by
socat -d -d pty,raw,echo=0 pty,raw,echo=0
in the specific case, I got /dev/pts/9 and /dev/pts/16
I then start screen on one side, in one X terminal, specifically gnome-...
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1
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Serial on host stops working during boot
I'm running Proxmox 6.4 with kernel 5.4.103-1-pve (I've already asked this question in their forums with no luck). My motherboard has a COM header, so I recently got the equipment I needed to hook it ...
1
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0
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2k
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Systemd ordering: after multi-user.target before getty.target?
I have an installer which I turned into a systemd service it needs,
networking.target to be online
multi-user.target to be online
I want my installer service to run after the above but before getty....
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1
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0
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125
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Key mapping on a physical terminal (Teleray 1060) when using getty
I have an old physical terminal (Teleray 1060) that I am attempting to use as a Linux terminal using getty. I have started a login session just fine. However, my terminal lacks an enter key, having ...
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0
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533
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How to use host PTY in container?
I'm learning about container technologies of Linux and wrote a minimal container implementation on my own. I'm currently confused about consoles / terminals for container processes, as I'm "reusing" ...
- 3,568
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741
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No password prompt for serial connection
I want to setup a password prompt (root user) when login through minicom (serial connection). After running passwd command (connected through ssh), i can setup a password for the root user. After that ...
1
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1
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3k
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How to prevent console-getty.service to start?
On my embedded system, I use linux kernel 4.19.102 and systemd 240. Everything is generated using buildroot 2019.02.9.
I use the serial port of my device to output console.
bootargs = "console=...
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2
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How do i edit my Arch system to display custom message on each tty?
I use Arch linux with i3 and xfce4 desktop environment. I have configured tty1 to open i3-gaps and tty2 to open xfce4. Is there a way to display a custom message on each tty saying that the current ...
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/etc/inittab: auto login on ttyS0
in my /etc/inittab, I have this line:
T0:2345:respawn:/sbin/getty -L ttyS0 115200 vt100
which gives me getty on serial console where I can log in.
How can I specify that instead getty, I get ...
- 728
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2
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976
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How do I configure passwordless serial console access on CentOS 8?
This official Red Hat page offers some vague hints.
Since /etc/securetty listed many possible devices so that the
practical effect in most cases was to allow by default, this change
has only a ...
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1
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1
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3k
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How to start dhcpcd in background on boot?
I would like to accomplish the following on Arch Linux: start dhcpcd in the background on boot while simultaneously automatically logging myself in and starting the X window server.
Here's what I've ...
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1
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2k
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how to start a new terminal with agetty (not systemd)
For the sake of learning, I wanted to start a new terminal (let's say tty10) from the command prompt. I know I can just run sudo systemctl start [email protected], but I want to run it manually for ...
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1
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537
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Change tty respawn in Debian 9 (Stretch )
I try to change respawn tty to some other bin file , before that I configure that on /etc/inittab
But now this file doesn’t exist ; how can I do that ?
( my goal is “ call my binary instead of tty ” )...
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2
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903
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How to find unlocked tty in linux?
I just discovered that when I have an tty open in the background my lockscreen is useless. I sometimes use another tty to kill some process and then I forget the unlocked tty. That is why I want to ...
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Why does agetty fail to determine passwordon ubuntu 18.04.1?
I'm running a ubuntu server installation with a tty console, and sshd terminal logins.
Both ssh keys and passwords work for authenticating over sshd.
Lately, on the console, when I try to log in in ...
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2
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328
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How can I determine when a serial terminal has (dis)connected?
I have a DEC VT101 serial terminal hooked up to a Raspberry Pi 3 running Debian using a USB RS-232 null modem cable. When I turn the terminal off, I would like for the shell session to end, and when I ...
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1
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946
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Why calling agetty directly from bash doesn't seem to have any effect?
I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, ...
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0
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1k
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Why do I not get a console with systemd?
I'm trying to get a login prompt on an embedded system using Debian and systemd. The system is connected via a physical serial console to a host PC. If I start the kernel with the cmdline parameters ...
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2
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0
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3k
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Debian Stretch auto login on boot
I am trying to figure out how to get automatic login to work with a base console installation of Debian Stretch testing
I tried an answer to a similar question on this site but it did not work:
...
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723
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Is `/etc/tty0` in Ubuntu the file used by `init` and `getty`?
APUE says
The BSD terminal login procedure has not changed much over the past 35 years. The system administrator creates a file, usually /etc/ttys, that has one line per terminal
device. Each ...
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8k
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What is the difference between [email protected] and [email protected]
To disable some getty on my device /dev/ttyAMA0, I have to mask it with systemctl mask [email protected]. This works fine. So I enable a getty on ttyUSB1 with systemctl enable getty@ftdi2....
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3
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922
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Is it safe to auto-login if the system is encrypted?
I'm running linux (specifically Debian 9) on my everyday-use laptop, where the disk with the system is encrypted, so whenever I boot it up, the password is required prior to entering the system. In ...
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1
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733
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Getting rid of a serial console on Respeaker Core V2
I have a Respeaker Core v2.0 and I would like to use the UART interface (this board has a USB to TTL adapter connected to the Uart port) in order to make this board communicate with another one.
...
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7k
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tty1 missing login prompt
I have a clean Debian Stretch installation. It used to be the case that after booting I would end up on tty1 with a login prompt, and after logging X is started. I wanted to automate the logging in (...
user37050
2
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3
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14k
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Serial Getty error messages
I've a cloud server, with CentOS distribution, and an Apache instance to manage some web apps, like Wordpress or PrestaShop.
I noticed that an error is reported in log files (var/log/).
In particular ...
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414
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Bash 'read' command. 'enter' key goes to the beginning of the line instead of completing 'read' command
I used agetty ( v2.27 ) to create a bash shell terminal through ttyGS0. For some reason, when I used a computer to create a console via the ttyGS0 line, after I call read, pressing the Enter key goes ...
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123
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logged in on X without environment
I have an rpi2. I want the same Black Screen that you get after Arch installation (without graphical environment), the only difference is that it automatically logs in with your user account.
I ...
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1
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1k
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how to change the getty binary in Debian Stretch?
I have a Stretch system n which I would like to replace agetty with ngetty (for various reasons like because I have no use for serial lines, and I like the way ngetty can be configured, for examples). ...
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1
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287
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How can one verify the authenticity of `getty` running on linux?
The unix haters handbook says:
/etc/getty, which asks for your username, and /bin/login, which asks for your pass-
word, are no different from any other program. They are just programs.
They happen ...
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1
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2k
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How do I use a serial terminal with a FreeBSD server?
I have been experimenting with an RS-232 null modem cable and am curious to know how one would allow FreeBSD to use a serial port as a terminal, like in the days of the PDP-11 where all users had dumb ...
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1
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318
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systemd: spawn gettys ASAP
Normally systemd will spawn a getty on the virtual terminals just before it starts graphical mode.
I have always thought that is the wrong time to spawn a getty: The time when you need the getty is ...
- 36k
16
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2
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3k
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How does X11 interact with the kernel / perform login
As I understand for text-based interaction with the Linux kernel, a program called init starts getty (or agetty) which connects to one of the TTY devices under /dev and prompts for a username. After ...
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systemd: Move getty to tty2+ and start script on tty1
I'd like to "autorun" a shell script on tty1 and start the rest of the ttys on tty2, tty3, ...
So far I have followed this advice (besides a ton of googling) and gotten the script to run on tty1 as ...
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1
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7k
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What is this openvt command doing?
What is this command really doing (step by step)?
openvt -c 40 /bin/agetty tty40 linux
I tried this command instead :
openvt -c 41 /bin/agetty tty40 linux
and agetty was started on tty40 (not ...
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54
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where to show custom info when successfully open a physic machine or connect a remote machine or login a machine in centos 7
Env
Centos 7 x64
When I use Teamviewer connect to ttys, I can view infos as below in each Ctrl-Alt-F1 to F6:
CentOS Linux 7 (Core)
Kernel 3.10.0-514.6.1.el7.x86_64 on an x86_64
Openning a physic ...
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0
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190
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Script started on tty at boot does not handle backspace correctly
I'm using Debian Jessie and have created a systemd service for launching a script on a tty like this:
[Unit]
Description=My Test Script
[Service]
Type=simple
ExecStart=/bin/bash /home/tester/test.sh ...
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0
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981
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tty1 ~ tty6 frequently get frozen on Arch
It is wired that tty1 ~ tty6 frequently be fronzen on my Arch Linux. When this problem occurs, all the tty console（tty1 ~ tty6) display nothing but a underline cursor which is not blinking. However, I ...
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Access higher TTYs and the role of getty
I have a few dark areas when trying to understands TTYs.
On my system, I have /dev/tty[1-63]. Is udev creating these character devices? And how can I access them (like tty2 can be accessed with Ctrl+...
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2
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3k
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agetty login program arguments
First post here. I'm trying to run some tests against a CentOS 6 machine, but my tests disable networking so I communicate over serial ports.
I created an upstart job that sets up ttyS1 such that it ...
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370
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Use mgetty to answer a call and press a key
I bought a GSM shield for the Raspberry Pi (version 1, B) and a SIM card to join the proper cellular network. I use mgetty to react to my call, like this:
mgetty conf
which works just fine and the ...
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1
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2k
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Is it possible to send color code escape sequences before login?
I'm trying to colorize the console and I'm having success with the following in root's .bash_profile:
echo -en "\e]P7000000"
echo -en "\e]P0F0F0F0"
clear
The problem is that this is obviously only ...
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2
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0
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470
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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) ...
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