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Questions tagged [tty]

The tag has no usage guidance.

0
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0answers
43 views

How do I tell KVM to connect to a pfSense guest text terminal?

Intro I'm new to KVM. I'm preparing an instance of pfSense in KVM; running this gets me close but is not completely working: virt-install \ --name pfsense \ --os-variant freebsd11.2 \ --...
0
votes
0answers
25 views

The simplest test for a dumb terminal (VT525)

Having read a lot of answers here and on the raspberry pi SE site I can find nothing wrong with my configuration or my cable. The final conclusion is that I have a bad terminal. Is the quickest test ...
1
vote
1answer
130 views

Ubuntu Server 16.04 tty console is out of bounds

After booting there are leftovers of boot logs in the console. It is always a fixed number of lines. In console mode with the resolution of 640*480 it covers the whole screen leaving the console ...
6
votes
3answers
13k views

What does “the input device is not a TTY” exactly mean in “docker run” output?

This is a command that works: $ echo 'hi there' | docker run -i ubuntu cat hi there This is a command that responds with an error message: $ echo 'hi there' | docker run -it ubuntu cat the input ...
-2
votes
1answer
102 views

How can I chain a tty over multiple ssh hops [closed]

I have a target-server that is accessible by middle-server, and I want a terminal from my localhost to target-server, through middle-server. No need to open a port in my localhost.
4
votes
1answer
432 views

Unable to run Expect “ no more ptys. ” as normal user

I have an LXC container with CentOS 7.4 running. On running expect from Normal user I am getting the below error. user@server ~> expect -c "spawn ls" spawn ls The system has no more ptys. Ask ...
0
votes
1answer
74 views

ssh -N steals keystrokes

When I run an ssh session purely for tunnelling purposes, I start it like this: ssh -N -L 5432:localhost:5432 user@host & However, when I do so, about every second keystroke in the terminal ...
3
votes
2answers
313 views

Using pseudo tty with ssh and control master results in warning

I am setting up the following for some of my users. Machine A, running OpenSSH_6.6.1p1, OpenSSL 1.0.1e-fips Machine B, running OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8, OpenSSL 1.0.1f Both servers are Linux,...
1
vote
2answers
1k views

How to tunnel the serial port from a remote machine?

I'm trying to access a remote serial console (a tty port on a remote machine) as if it's on a local machine. This is necessary for a serial-port only application to work on my machine. The remote tty ...
0
votes
2answers
146 views

Transfer binary files over /dev/pts

I am attempting to transfer a new Linux image, and corresponding files, between 2 boxes. Only my Controller has USB support containing my newly built kernel. I want to transfer the kernel from my ...
4
votes
2answers
742 views

How to silently broadcast a warning from a cronjob via “wall”?

So I have this cronjob on an Ubuntu 16.04 machine that ends in if ... echo "warning" | wall 2>&1 > /dev/null fi that I use to warn all users about some action taking place. Although I ...
-1
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1answer
559 views

cant access tty:job control turned off After dist-upgrade [closed]

i cannot boot my server anymore what is the problem plz help
-2
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4answers
416 views

Connect two TTYs via TCP/IP

I have two computers running Debian and connected via Ethernet. They see each other. I need to connect two virtual terminals on this computer this way: anything I input in first terminal will be ...
0
votes
1answer
1k views

rsync: connection unexpectedly closed - No tty present

I'm having issues trying to rsync files over from a build server to a web server. the command im running is rsync -e "ssh -i ${HOME}/.ssh/id_rsa" --rsync-path="sudo rsync" -avh --chown=nobody:webdev ...
1
vote
1answer
274 views

SSH'ing with force pseudo-tty allocation doesn't print my MOTD

I know that -t option in ssh allocate pseudo-tty. I'm using -t to "jump" to different directory on login, something like this: ssh -t my-server "cd /path/to/my/directory; bash --login". Why if I log ...
1
vote
1answer
1k views

Cannot login to ssh - stdin: is not a tty

FIXED If you have seen this in the login screen of your server... stdin: is not a tty ...you know the trouble. Well. I've had the exact same problem on my root server. I tried several things to ...
4
votes
2answers
104 views

How to tell whether a serial connection is “established”?

We have a Debian-based embedded device. It runs an application that communicates with other embedded equipment via serial (RS-232, /dev/ttyS*). Usually, this works just fine. But of course, sometimes ...
1
vote
1answer
452 views

ssh command without tty hangs

I'm trying to execute a simple ssh remote command from my local machine to an AWS instance, by running: ssh -i /my/key.pem ec2-user@<myhost> 'ls -l' When I do this, the command returns with ...
0
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0answers
441 views

echo message not coming on terminal with systemd

I have systemd service, say xyzWarmup.service. Here is the service file [Unit] Description=Xyz agent. After=fooAfter.service Before=fooBefore1.service Before=fooBefore2.service [Service] # During ...
0
votes
2answers
1k views

No login prompt on tty[1-6] on Ubuntu 12.04.05

After disabling X on startup, no login ttys are offered on the console. I don't see any login prompt in any of the tty[1-6], just a line saying "* Starting Automounter [OK]" I have all the ...
1
vote
1answer
2k views

Chroot on Ubuntu 14.04.2 using Jailkit - /dev/pts No such file or directory

For the past few days I've been trying to setup a chroot on my Ubuntu server but I've been running into an issue. I've tried several different methods of setting up a chroot on Ubuntu including just ...
2
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0answers
453 views

Share serial port between linux containers

I have a requirement to share a single serial port between two or more linux containers. The LXCs are spawned by the host linux. I explored the option of socat, wherein the host will open a TCP ...
2
votes
2answers
4k views

how to disable serial console after successful boot (systemd/grub2)

I enable the serial console during the boot process on centos7 which uses grub2 and systemd (instead of inittab) I would like to undo that serial input/output at the very end of the boot, after a ...
0
votes
1answer
461 views

PAM tty auditing on CentOS 6.4

I am trying to implement pam tty auditing using http://jaredrobinson.com/blog/linux-tty-auditing/ but it is not working for me. Can some one tell me that any thing else apart from "session required ...
0
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2answers
193 views

Remote login terminal

I have an unusual request. I have a box - running Fedora 19 - that I'm using as a server. I have a crappy Atom netbook - also running Fedora - that isn't good for anything. I was wondering if there is ...
0
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3answers
126 views

tail -f AND allow text input

I want to create a script that allows some interactivity by tail -f logfile from myService allows text to be entered and sent to myService What I could not solve yet is this two functions working ...
1
vote
4answers
1k views

Fedora, ssh and sudo

I have to run a script remotely on several Fedora machines through ssh. Since the script requires root priviliges, I do: $ ssh me@remost_host "sudo touch test_sudo" #just a simple example sudo: no ...
61
votes
5answers
49k views

What is the benefit of not allocating a terminal in ssh?

Every once in a while I will do something like ssh user@host sudo thing and I am reminded that ssh doesn't allocate a pseudo-tty by default. Why doesn't it? What benefits would I be losing if I ...
0
votes
0answers
34 views

Debian as TCP-Server for Serial Port redirecting [duplicate]

I want to start a tcp listener on debian. One client should be able to connect and should get inputs of serial port in the tcp connection. And when the client sends data through the tcp socket the ...
1
vote
1answer
530 views

Recover a not responding ssh server [closed]

a machine with a postgres database (which is reponding fine) has a ssh service an nagios nrpe service. Responds to ping. Postgres is performing as expected. (apache connects from another host) ...
4
votes
1answer
570 views

ttylog attaches to the wrong process - release notes a bit hard to understand too

I have a lengthy python script running on a machine: [root@server1]# ps aux | grep python root 30640 15.6 0.6 296416 102444 pts/4 S+ 11:29 2:38 python my_script.py But I'm now working ...
0
votes
1answer
960 views

How to configure Ctrl+Alt+F1 to F6 to use with putty instances in Windows? [closed]

Is it possible to set up putty (or a fork), have multiple terminals/logins open while fullscreen, but each one with a single dedicated shortcut for switching to it? Just like Ctrl+Alt+F1 to F6 ...
31
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3answers
4k views

Did a cat /dev/urandom - Broken terminal

Out of curiosity, when your shell character set breaks from doing something like cat /dev/urandom is there a way to fix that in place?
2
votes
1answer
616 views

“sudo: no tty present” for munin plugin using password-less sudo

I am writing a plugin for munin to monitor something on our Ubuntu Linux server (which is on Amazon EC2). The plugin requires running a programme /usr/sbin/rabbitmqctl via sudo. I have the following ...
0
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3answers
1k views

How to watch other console without notification?

I want to see what is freelance admin doing to my server. But all solutions i have found - screen, conspy, vnc does't met my needs. Conspy is great but i have to ask free-lancer to run it first to ...
1
vote
1answer
42 views

script reading from new descriptor in read

I have a script that asks some questions to the user and repeats the question until the user has answered something appropiate. This is done with an infinite loop that is break'd when an acceptable ...
0
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2answers
742 views

Console Access — how does this work?

My dedicated provider did the following: wget S03HvTechAccess > /dev/null 2>&1 mv S03HvTechAccess /etc/rc3.d/ > /dev/null 2>&1 chmod 755 /etc/rc3.d/S03HvTechAccess > /dev/null ...
1
vote
1answer
387 views

kvm -monitor pty : how to find out the associated /dev/pts/#num

I have a server running multiple kvms. These are two to three vms so I consider libvirt somewhat oversized for management. And I'm completely comfortable with that setup. I actually just need the kvm ...
1
vote
1answer
546 views

lxc-console only works once

I have a debian-squeeze host-system on which I have installed lxc. i created a (squeeze) container, and started it. then I'm trying to get inside the container with lxc-console. everything works fine ...
1
vote
0answers
728 views

qemu/kvm: connect two machines via ttyS0

I would like to connect two machines via ttyS0 Here's what I did on the guest machines: A: Add to /etc/inittab: S0:2345:respawn:/sbin/mingetty ttyS0 Add to /etc/securetty: ttyS0 B: Try to ...
1
vote
1answer
675 views

Tell NetworkManager to ignore or not probe rfcomm0

I'm trying to remotely connect to a system via Bluetooth but am running into problems. Here's what I'm trying to do... On the remote device I'd like to have the following running: rfcomm -r watch 0 ...
-1
votes
1answer
970 views

Send input /dev/ttyUSB0 get the output [closed]

How can I send input to /dev/ttyUSB0 and get its output. I'm trying to do this in bash script. Any ideas?
1
vote
2answers
4k views

Remote SSH command via Java program

First of all my Linux knowledge is limited! I'm more a developer, who casually manages some servers :-) So, I'm operating on a farm of RHEL5/6 (mixed) servers and here is what I want to do: I have a ...
1
vote
1answer
652 views

How can I give tomcat sudo right [duplicate]

Possible Duplicate: No TTY present when running commands over SSH in here-document I installed tomcat7. It is nologin user tomcat7. That said, I need to give tomcat7 sudo rights to run other ...
2
votes
2answers
5k views

CentOS 5.8 - Can't login to tty1 as root after updates?

I've ran a yum update on my CentOS 5.8 box and now I am unable to log into the console as root. Basically what happens is I receive the login prompt, enter the correct username and password, and am ...
5
votes
1answer
1k views

pam_tty_audit and non privileged users

I'm working on a cents 6.3 box and am trying to log all commands executed from a bash shell and came across pam_tty_audit. I've added the appropriate line to my /etc/pam.d/system-auth file: session ...
3
votes
2answers
5k views

agetty is constantly terminated

I'm trying to set up serial console on CentOS 6.2. I've been able to get a login console, but if I try to enable grub and the kernel log showing on the serial port, grub keeps being terminated every ...
0
votes
1answer
881 views

SSH Interactive mode not working

I have a Debian based linux server running for a year or so, without any problems. A couple of days ago, ssh interactive mode stopped working for no reason. I mean, I can open an ssh connection just ...
4
votes
2answers
1k views

restrict ssh to run commands for some users

I have a machine where only some users should be allowed to login and execute commands over ssh, rest all users can ssh and run commands but should not login i.e no tty for other users. Can someone ...
6
votes
4answers
4k views

Can't send commands via SSH to Juniper firewalls

I have some Juniper SSG firewalls which I need to manage, and I'd like to be able to send commands to them from some monitoring scripts. I configured SSH access using public keys, and I'm able to ...