Questions tagged [getty]

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How to use a GPS module on UART without preventing Linux from boot

I'm trying to get the following running: RaspberryPi4 Kali and GPS module on UART /dev/ttyS0 Odroid-C2 Ubuntu and GPS module on UART /dev/ttyS1 Nomatter what I try to do, on a reboot the ...
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36 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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1answer
64 views

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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1answer
217 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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2answers
90 views

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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1answer
351 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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2answers
171 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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1answer
260 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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0answers
59 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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1answer
258 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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2answers
175 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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1answer
556 views

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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793 views

TTY Login hangs after username input with constant newline

Problem: After a restart my Ubuntu Server 18.04 installation greets me as usual with the tty1 login prompt. The input of the username works as usual but after hitting enter the password prompt is ...
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2answers
91 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 ...
1
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1answer
238 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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0answers
614 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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0answers
2k views

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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1answer
189 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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1answer
2k views

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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3answers
279 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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1answer
304 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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1answer
3k 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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3answers
4k 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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0answers
276 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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1answer
72 views

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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1answer
931 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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1answer
128 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 ...
2
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1answer
845 views

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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1answer
102 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 ...
14
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2answers
2k views

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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0answers
360 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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1answer
3k 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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1answer
39 views

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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130 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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480 views

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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1answer
935 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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2answers
1k 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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0answers
229 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 ...
2
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1answer
992 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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0answers
219 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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1answer
716 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 ...
2
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2answers
952 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 ...
4
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0answers
1k views

How to send AT commands to serial interface in Yocto Linux?

I have a XBee device attached to the ttyMDF1 interface on an Intel Edison board running Yocto linux. I need to configure the XBee by sending AT commands to it. I have tried to open a getty /dev/...
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0answers
919 views

Stop /sbin/agetty and log out the session

I start agetty using /sbin/agetty 115200 /dev/ttyS2 vt220 to provide console access through my port ttyS2. From the other computer, I can create a connection, and upon opening, I am prompted with ...
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1answer
447 views

agetty dumb terminal option

I'm trying to set up a CentOS distro to output on a serial console. I went through all the steps described on this page . My question concerns the agetty command: exec /sbin/agetty ttyS1 19200 ...
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2answers
8k views

What is the difference between getty and agetty?

When I looked in the manual for agetty all I saw was alternative getty
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1answer
502 views

Netctl causes getty to clear the screen and re-display the issue message

I have systemd configured to not clear the terminal before calling getty, and also getty itself is run with the --noclear option, so that my boot messages are left displayed when the login prompt from ...
1
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1answer
742 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 on ...
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2answers
3k views

Running more than one console X session with startx at the same time

I have xfce running in display 0 (accessible via Ctrl + Alt + F1). I press Ctrl + Alt + F2 and type startx (attempting to run more than one window manager at the same time) and receive the error "...
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1answer
1k views

“askfirst” getty with systemd (“press enter to activate this console”)

On a Debian Jessie system with systemd, how can I configure the terminals so that a message like Press enter to activate this console is displayed and the login prompt does not appear before hitting ...