When trying to run the command ssh user#ip 'command', I keep receiving this error: can't get tty settingscan't set orig mode. I have tried googling this and searching here but have not found anything referring to this message. I am trying to automate connecting to a Cisco wireless access point (2800 model) using Golang to run a command then exit, but this message pops up each time. I can log in normally using ssh user#ap_ip, but using the shorthand ssh user#ap_ip 'command' or trying the equivalent in Golang gives the error message above. Anyone know what's going on?
ssh without explicit command given will allocate a terminal while ssh with a command given will by default not. It looks like the command you execute needs a terminal. In this case use the -t option, i.e. ssh -t user#ip command. From the documentation:
-t Force pseudo-terminal 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. Multiple -t
options force tty allocation, even if ssh has no local tty.
Related
I'm managing hundreds of network devices, and when i want to ssh to a device, I need to type in my jump server "ssh -l $user $ip/dnsname" in terminal.
I have an idea that's write a bash script and run it as a service. When I want to ssh to any device, I just need to type the IP address or DNS device name in the terminal and hit enter. It will execute the ssh command automatically.
But i'm new in bash, could you guys please give me an instruction?
I am sshing into a mac running zsh but each character that I type is remembered and repeated. For example, if it type exit, I see eexexiexit on the screen but the command exit is executed.
If I type directly on the remote machine, there is not a problem so it is the communication via ssh that is the issue. I have no idea how to solve. Any suggestions?
I realised that I just needed to ssh into the remove server with the following command: 'TERM=screen-256color ssh ...
I welcome rephrasing of my question, because I'm not sure exactly what the problem is called.
I am trying to run a shell script via SSH using a command of the following form:
ssh -o StrictHostKeyChecking=no lxplus0035 "cd ~/test; bash script1.sh"
When I do this, the complex script script1.sh breaks with many syntax errors, operand errors and other errors. An example is as follows:
stty: standard input: Invalid argument
The script works fine when run directly, not via SSH, in the local system and in the remote system (when connected in an SSH session). Why might executing the script via SSH cause these problems?
The stty problem is not related to your environment, it's a result of the SSH command not allocating you a TTY (What is Pseudo TTY-Allocation? (SSH and Github)). Adding -t argument for ssh should fix it.
Further information:
http://go2linux.garron.me/linux/2010/11/ssh-t-open-pseudo-tty-run-commands-remote-server-809/
http://capistranorb.com/documentation/faq/why-does-something-work-in-my-ssh-session-but-not-in-capistrano/
Shrewsoft [1] provides a command line interface for setting up the vpn tunnel automatically without any user intervention, such as by using the following command
ikec -u username -p password -r configuration -a
IS there any way to detect if the connect attempt was successful such as by reading live logs and how can we terminate the vpn tunnel after some time using the command line. Any help will be appreciable.
By looking at the terminal output from ikec -u username -p password -r configuration -a, you can tell if the connection was successful; if the output has a line ii : tunnel enabled, that means the connection was successful and should work. If you get a message such as >> : detached from key daemon or failed to connect to key daemon, it means there was a problem with the connection (https://askubuntu.com/a/793336/705434 suggests running sudo /usr/sbin/iked for a solution to this particular error). To exit the ikec command, just type q into the terminal.
EDIT: it looks like this page (https://gist.github.com/fschabmeyer/22b759994cf852df7e9b) has a shell script that can handle the detection, you should be able to add a case to exit the command automatically after a certain amount of time.
I need to pull something along the lines of "telnet root#192.168.2.99: irinject BACK"
however this refuses to work. There is no password required.
What is the correct syntax to perform this task using the terminal on Ubuntu 11.10?
If you absolutely must do it this way, use echo or etc. to pipe commands to the telnet session — and be ready to reinstall machines as they get hacked.
Strongly preferred is to use ssh with key access; you can even include the command that way.
ssh -i path/to/root-key root#host command