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0answers
20 views

Different behavior of the cron [duplicate]

I have a script (seekCustomers.sh), which perfectly works from the command line: #!/bin/bash echo "Hello" The script is owned by non-root user. I want to put it on schedule using cron daemon. So, ...
3
votes
0answers
65 views

Optimal way to trace back TTY session that locks a resource? [migrated]

Say you have plenty of interactive shells being run under same user id, like lots of screen or tmux (or both) "tabs". You tried unmount'ing a device and realised you couldn't since one of those shell ...
0
votes
1answer
61 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
36 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 ...
0
votes
1answer
37 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
37 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 ...
25
votes
4answers
16k 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
37 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
votes
0answers
84 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 ...
2
votes
2answers
2k views

Running sudo commands in cloud-init script

I'm developing an automatic bootstrapper for some servers as we are using Amazon EC2 for our infrastructure. What I do is: run a Fabric script which connects to EC2 and initializes a new instance, ...
0
votes
2answers
262 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 ...
0
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0answers
67 views

How to monitor keystrokes of an lxc guest that is connected via ssh?

I have an unprivileged LXC container which runs an SSH server (both LXC guest and LXC host are Ubuntu 14 servers) . The ports to connect to the container are forwarded, so one can connect from outside ...
2
votes
2answers
685 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 ...
1
vote
1answer
814 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 ...
4
votes
2answers
5k views

How to find out the currently active linux virtual terminal while connected via ssh?

The situation is as follows. I have a multiuser desktop machine with Debian Linux 6.0 and an ATI videocard with one monitor connected. I have root access to it. There can be several KDE sessions ...
1
vote
0answers
191 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 ...
0
votes
1answer
248 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 ...
1
vote
2answers
2k views

USB To Serial under OpenSuse 11.3

I have a LogiLink USB-To-Serial adapter. This has the PL2303 chip inside. When I insert the device: [26064.927083] usb 7-1: new full speed USB device using uhci_hcd and address 9 [26065.076090] usb 7-...
0
votes
2answers
125 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
votes
1answer
465 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 ...
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 ...
0
votes
3answers
82 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 ...
5
votes
3answers
3k 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 ...
0
votes
0answers
21 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 ...
4
votes
1answer
298 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 ...
1
vote
1answer
259 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) ...
28
votes
3answers
3k 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
399 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 ...
1
vote
1answer
364 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 ...
0
votes
3answers
679 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
2answers
34 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 ...
1
vote
1answer
516 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 ...
0
votes
2answers
340 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 ...
4
votes
1answer
747 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 ...
1
vote
1answer
225 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
278 views

git hook and ssh on server

I have a git repo on a server. I would like to run a update hook on this when a push is done. I am unable to get git revlist or take any information from the user because i can't enable tty. I have ...
1
vote
0answers
496 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
2answers
3k 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
votes
1answer
590 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
1answer
293 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
4k 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 ...
3
votes
2answers
4k 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 ...
3
votes
2answers
5k views

Getty flooding syslog after kernel upgrade with “cannot open as standard input”

I just updated my kernel on an Ubuntu 9.10 system from 2.6.32.1 to 2.6.33.5, and everything seemed to go well, except now my system log is getting flooded with errors from getty: Jul 25 11:01:54 ...
0
votes
1answer
580 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
741 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 ...
0
votes
2answers
461 views

Serial Port ttyUSB0

I picked up a USB serial null modem cable, so that I can connect up to a headless linux box. As a quick test, I plugged the device into the usb null modem, and the other end I connected to a windows ...
1
vote
2answers
2k views

sudo: sorry, you must have a tty to run sudo

I am trying to run this bash script as a cron job, but I am getting an error which says sudo: sorry, you must have a tty to run sudo. I am running this bash script in amazon EC2 linux instance. #!/...
47
votes
4answers
39k views

How can I launch a screen session with a command over ssh on a remote server from my desktop?

I want to be able to launch screen sessions on remote servers from a single ssh command on my desktop. However, screen seems to need a terminal, which is not available when running a command through ...
1
vote
1answer
3k views

How to add a serial COM port to Windows server 2008 using Linux + KVM + Qemu?

We are using Linux + KVM + Qemu with libvirt on our servers to manage virtual WIndows 2008 Servers. The Host is Ubuntu 11.04. The point is on one of our Windows server 2008 guest, we need to connect ...
4
votes
1answer
9k views

“debug1: read_passphrase: can't open /dev/tty: No such device or address” when trying to connect through SSH

I am trying to connect to my server using ssh user@server.com -vv I get debug1: read_passphrase: can't open /dev/tty: No such device or address error or just Permission denied, please try ...