Questions tagged [tty]
The tty tag has no usage guidance.
74
questions
2
votes
0
answers
483
views
Docker run failed: no space left on device "/dev/ptmx"
When I try to run any Docker container with an interactive terminal, I get the following error:
$ docker run -it --rm my-container
docker: Error response from daemon: failed to create shim task: OCI ...
- 141
0
votes
1
answer
2k
views
Difference between -t and -tt ssh
man ssh says:
-t Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a
remote machine, which can be very useful, e.g. when implementing menu services. ...
- 123
1
vote
1
answer
333
views
ssh_config equivalent to ssh -t
Is there an equivalent to ssh -t in the ssh config?
I couldn't find anything in the man pages.
OpenSSH >= 8.9
- 123
1
vote
0
answers
186
views
systemd-nspawn can't auto login
I'm trying to config auto login for my nspawn container and I created /etc/systemd/system/[email protected]/autologin.conf
and inside of that I wrote this config:
[Service]
ExecStart=
...
- 11
2
votes
0
answers
90
views
Communicate between Windows and Linux subsystem using Virtual COM Port
I have a Windows program that connects to a COM port to send and receive data. The the other end is another program that is running on a remote Linux machine that also uses the COM port to communicate....
- 159
1
vote
0
answers
160
views
How to assign a tty to a process?
I can configure a command which will be run without a tty (similar to a cronjob). The problem is that the binary to be run seems to require a terminal. Is there a way to run a process with a new tty ...
- 111
0
votes
0
answers
3k
views
Display service output on console using systemctl
I have following service file -
[Unit]
Description=Open VPN Agent
After=syslog.target
After=network.target
[Service]
Type=forking
TTYPath=/dev/pts/0
KillMode=process
PIDFile=/opt/openVPN/pids/...
0
votes
1
answer
129
views
When process writes to pseudoterminal slave, why it doesn't read what it wrote?
Here is my bash session:
lrwx------ 1 stas stas 64 Mar 5 18:18 0 -> /dev/pts/0
lrwx------ 1 stas stas 64 Mar 5 18:18 1 -> /dev/pts/0
lrwx------ 1 stas stas 64 Mar 5 18:18 2 -> /dev/pts/0
...
0
votes
0
answers
817
views
pam_tty_audit collect only TTY events
I'm trying to put together a TTY logging feature under Ubuntu 18.04 server and created /etc/pam.d/tty-audit with the following content:
session required pam_tty_audit.so enable=*
and added that ...
- 3
5
votes
1
answer
2k
views
Need a replacement for "Snoopy"
Currently, we use Snoopy to monitor all commands issued by users on some externally accessible servers. We're in the process of updating everything to RHEL8 to ensure supportability and compliance, ...
- 153
1
vote
0
answers
256
views
Script command on alpine
I want to preserve colors of docker exec command. The only way I found is to use script command like so
docker exec <container_name> script -q -c "./spiral migrate:status" /dev/null
The ...
- 183
0
votes
1
answer
347
views
Can many script instances write to tty (parallel)?
I have recently migrated my upstart scripts to systemd, unlike upstart, I don't
see any output on the tty for services being started/stopped. To get that visual
feedback, I added something like
...
- 32
0
votes
0
answers
354
views
Fix or explain tty issue and gpg2
I'm having an issue importing or generating gpg secret keys on ubuntu 18.04 with my main (sudo) non-root user. With root user I have no problems with gpg, but non-root and it's basically permission ...
- 101
1
vote
1
answer
966
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 \
--...
- 212
1
vote
1
answer
479
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 ...
- 11
37
votes
3
answers
87k
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 ...
- 619
-2
votes
1
answer
523
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.
- 1
3
votes
2
answers
4k
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 ...
- 213
0
votes
1
answer
91
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 ...
- 327
2
votes
2
answers
802
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,...
- 151
1
vote
2
answers
5k
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 ...
- 141
0
votes
2
answers
371
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 ...
- 153
7
votes
2
answers
2k
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 ...
- 1,048
0
votes
1
answer
1k
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
votes
4
answers
879
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 ...
2
votes
1
answer
3k
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 ...
- 168
1
vote
1
answer
1k
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 ...
- 893
1
vote
1
answer
2k
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 ...
- 21
5
votes
2
answers
246
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 ...
- 3,412
1
vote
1
answer
1k
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 ...
- 448
0
votes
0
answers
744
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
2
answers
3k
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
1
vote
1
answer
5k
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
votes
0
answers
678
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
2
answers
10k
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 ...
- 459
0
votes
1
answer
694
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 ...
- 61
0
votes
2
answers
205
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 ...
- 248
0
votes
3
answers
239
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 ...
- 103
1
vote
4
answers
2k
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 ...
- 215
85
votes
5
answers
94k
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 ...
- 2,053
0
votes
0
answers
57
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 ...
- 269
1
vote
1
answer
899
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)
...
- 1,657
5
votes
1
answer
940
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
1
answer
1k
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 ...
- 127
31
votes
3
answers
6k
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
1
answer
799
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 ...
- 31.9k
0
votes
3
answers
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 ...
- 35
1
vote
1
answer
52
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
votes
2
answers
917
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 ...
- 6,681
1
vote
1
answer
572
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 ...
- 11