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Questions tagged [getty]

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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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Revert Desktop to and from Headless state

Is there a way to used systemd to revert my desktop to a headless state (without rebooting). Then run a VM with passthough. When I am done i'd like to restore a fully functional desktop with graphics ...
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  • 111
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Unable to switch TTYs under Xorg Qtile window manager

sudo chvt [1-7] works as intended and while on tty C-A-Fn[1-7] works fine. But while in my window manager i cannot change ttys... inferno in ~ ❯ sudo sv status agetty-tty1 run: agetty-tty1: (pid ...
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1 answer
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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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Debian Server: On boot local monitor displays log not a terminal but can log in and run commands but can't see it

So I installed a fresh version of debian server. But I don't seem to be able to login on the computer itself but can access and run commands via ssh. I tried typing in my username and password and I ...
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Autostart Fbterm then Tmux in Arch Linux

i have installed Arch Linux and i want to use the OS without GUI. so i installed FBTERM and TMUX to assists my life in GUI-less OS. both programs running perfectly, so i want to make FBTERM and TMUX ...
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How to write a .read function in serial tty driver with console struct

I am writing a serial tty driver in linux which will be used as a UART driver for the boards console(all operation from login to shutdown). I have written the .write operation of the console which is ...
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1 answer
235 views

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 ...
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1 vote
0 answers
514 views

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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2 votes
0 answers
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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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1 vote
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282 views

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" ...
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1 answer
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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 ...
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1 vote
1 answer
1k views

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 answers
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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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1 answer
2k views

/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 ...
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2 answers
501 views

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 vote
1 answer
1k views

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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2 votes
1 answer
315 views

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 getty@tty10.service, but I want to run it manually for ...
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1 answer
394 views

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 answers
376 views

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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1 answer
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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 answers
166 views

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 vote
1 answer
454 views

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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3 votes
0 answers
901 views

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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  • 3,352
2 votes
0 answers
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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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1 answer
395 views

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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1 vote
1 answer
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What is the difference between serial-getty@ttyAMA0.service and getty@ttyAMA0.service

To disable some getty on my device /dev/ttyAMA0, I have to mask it with systemctl mask serial-getty@ttyAMA0.service. This works fine. So I enable a getty on ttyUSB1 with systemctl enable getty@ftdi2....
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  • 171
2 votes
3 answers
551 views

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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0 votes
1 answer
508 views

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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1 vote
1 answer
4k views

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 (...
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3 answers
9k views

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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1 vote
0 answers
376 views

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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0 votes
1 answer
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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 vote
1 answer
1k views

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 vote
1 answer
172 views

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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2 votes
1 answer
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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 vote
1 answer
160 views

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 ...
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16 votes
2 answers
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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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1 vote
0 answers
426 views

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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  • 391
2 votes
1 answer
5k views

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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  • 3,229
0 votes
1 answer
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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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1 vote
0 answers
153 views

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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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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1 vote
1 answer
1k views

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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3 votes
2 answers
2k views

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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2 votes
0 answers
266 views

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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2 votes
1 answer
1k views

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 votes
0 answers
317 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) ...
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  • 163
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1 answer
980 views

/etc/issue file does not get reflect without login logout

I changed my /etc/issue file to display IP and system info with background color, and built a system which run on CentOS 7, but problem is when i deploy my machine on ESX it display regular /etc/issue ...
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4 votes
3 answers
2k views

Linux Terminal autologin only once after reboot

I'm trying to have my computer automatically log in as a specific user after reboot on an Arch Linux machine. I followed the guide from the Arch Linux Wiki, ran # systemctl edit getty@tty1 and pasted ...
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