SSH (Secure SHell) is a protocol for running commands on a remote computer.

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Execute script on Linux Mint from a Windows Machine

Basically I am trying to use Linux Mint to display Powerpoint presentations. The presentations will be updated on a Windows machine, the user will then execute a script which 'refreshes' the ...
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2answers
4k views

Why do my sshd logs show many tries on invalid ports?

My ssh daemon is setup to listen on port 2221. I have also disabled root login from ssh. I don't understand why in auth.log I see attempts to log on other ports (example with 4627 here). May 17 ...
2
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1answer
308 views

Linux motion user - run it as ssh key as pi to remote server

This question is related to the two other questions I had earlier, about enabling Raspberry Pi to act as a motion sensor that will try to ssh into a more powerful server when it detects motion (the ...
4
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3answers
705 views

Is it possible to get uid table in Linux?

I'm a student in a university and I can finger and id all users (students etc) through SSH. Here is the id command e147200@beluga:~$ id e201634 uid=22678(e201634) gid=3561(stat_bs) ...
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1answer
3k views

OpenELEC, non-root user, home directory, SSH

I'm running OpenELEC on Raspberry Pi As you know, directory /storage is a shared home folder between user root and user openelec This makes a problem when you want to setup ssh key authentication for ...
6
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1answer
528 views

Waiting until SSH tunnel (ssh -w) is set up before running command

When using SSH VPN tunnelling (-w option), is there a way to know when the tunnel is actually up? I want to use this in a script that automatically sets up the tunnel by running ssh -w then running ...
8
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4answers
32k views

bash: /home/user/.ssh/authorized_keys: No such file or directory

Create a ssh key: $ ssh-keygen -t rsa –P "" Moving the key to authorized key: $ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys bash: /home/user/.ssh/authorized_keys: No such file ...
3
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1answer
840 views

How do I find out what my ssh-key's finger print is?

I ask someone for their public key, and add it to my server. When they connect to the server for the first time, they will get the standard message in the form The authenticity of host '[host]' ...
1
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2answers
121 views

How can I access a linux box at home in my browser at work? [duplicate]

I want to be able to use taskwarrior at work. But the computers at work don't allow me to install anything, they all run Win XP, and IE... So, I would like to somehow SSH to a linux box at home, and ...
8
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1answer
3k views

delay to get password prompt when ssh'ing to a public server

i have a server (debian 7) setup in my university with public ip. when I ssh into the system (from outside the campus), I get a weird delay of 5-10 seconds before I get the password prompt. Why is ...
1
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2answers
674 views

Does dropbear take care of hosts.allow and hosts.deny?

I'm running dropbear as SSH daemon on Debian (actually Raspbian). I tried setting # /etc/hosts.allow dropbear:192.168.1.1 # my static ip from which I SSH connect to the device and # ...
1
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1answer
212 views

What is the maximum length of an ssh-banner message?

It seems that if the banner message is longer than a certain limit, no banner at all will be displayed to the client. What is either the character or file size limit?
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3answers
5k views

parallel-ssh with Passphrase Protected SSH Key

I'd like to use my passphrase protected SSH key when performing tasks with parallel-ssh (and related tools). However, I can't get this to work. All the documentation, regarding parallel-ssh, show ...
34
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5answers
126k views

ssh_exchange_identification: Connection closed by remote host (not using hosts.deny)

I'm not using hosts.allow or hosts.deny, further more SSH works from my windows-machine (same laptop, different hard drive) but not my Linux machine. ssh -vvv root@host -p port gives: OpenSSH_6.6, ...
2
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1answer
945 views

Change IP remotely over ssh

I am using CentOS. I have a management server which has password-less ssh access to four other servers. I don't have physical access to these servers. In other words, I have to make all ...
7
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1answer
1k views

Ssh audio redirection

I have DVB-T USB dongle plugged into my Linux server (GUI-less). It works correctly, but I want to stream TV programs from server to my PC. For this I use Kaffeine that way: ssh -X -p 666 -i ...
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4answers
1k views

Why does this shell script fail in bash, but the commands work in SSH?

I'll first admit to being quite the noob in Linux/SSH/etc. What I'm trying to write is a shell script that will back up a website and all the MySQL DBs that support it. I found examples all over the ...
2
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1answer
486 views

Unable to SSH into Google Cloud Server after Reboot

I was learning to configure a Debian server and familiarising myself with the common command lines. However, after executing the reboot command in SSH, my subsequent SSH connections were refused and ...
1
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2answers
915 views

ssh-agent not adding key when started graphically

Recently I added the following script to my auto-start (in KDE): eval `ssh-agent` ssh-add The script should be started at login and ask for my passphrase and load my secret key. It does almost ...
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2answers
562 views

Passwordless ssh login not with disabled direct console root login

We have the centralized server which has passwordless SSH configured to access other Linux servers within our environment. The issue we are facing is that when we disable root direct console access ...
2
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2answers
3k views

Disable SSH password authentication on specific interface

I have an OpenWrt router, I want to disable password authentication on SSH, so that one can only authenticate with keys. This is easily achieved by following the guide in the documentation, however, I ...
1
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1answer
450 views

Can I switch to another process in another tty# terminal from an ssh terminal?

Here's the deal. I have a Linux Mint 15 server running a web server, an ssh server, and a minecraft server. When I go back to college after the summer, I want to leave my machine at home (6 hrs away) ...
1
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1answer
338 views

X11 forwarding over ssh

I used to log into a remote server on our corporate network using Xephyr and ssh using the following command Xephyr :0 -ac -br -screen 950x540 | xterm -bg black -fg white -display :0 -e ssh -Yf ...
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0answers
930 views

Can I ssh to a server through a pptp tunnel? [closed]

I'm new to VPNs, so there's a good chance I'm completely misunderstanding my needs here. My workplace is setup so that I can only ssh into its servers when either (a) I'm using a computer in the ...
4
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1answer
5k views

Adding public is_rsa.pub to known_hosts automatically - how to?

How to automatically add server to known_hosts ? (and not use md5 fingerprint, as I mean secure way, please not send "auto yes/accept" solutions. I want to bring required credentials from server to ...
0
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1answer
1k views

git, setting up remote repository without ssh

I want to set up a remote git repository on a openSuse machine, and I have the following question. Do I really need ssh on the machine, to set up the remote git repository? Initially is it possible ...
0
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1answer
297 views

Can I use `screen` to keep an ssh tunnel alive from the client?

I read here that you can keep your ssh sessions alive a bit longer using a utility called GNU screen. Is it possible to keep an SSH tunnel alive longer with this as well?
2
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4answers
487 views

Allow guest SSH login and redirect to a program

Sometimes I get really silly ideas. This time, the idea is to deliver an easter egg for anyone who decides to try and connect to my server via SSH. Doing so will run a program, such as easteregg.sh, ...
5
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1answer
2k views

Generate own (stronger) RSA host key for OpenSSH?

I would like to replace the default 2048 bit host key generated when installing OpenSSH or starting it the first time with one of 4096 bit length. This leads to two questions: Does OpenSSH allow ...
3
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1answer
103 views

What is the best way to create remote tunnel?

I have 3 Linux servers: 10.0.0.0/24 - (10.0.0.10) Linux server inside my LAN. 20.0.0.0/24 - (20.0.0.10) Linux server with HTTP Apache server 50.50.50.50/32 - Server on Amazon AWS which see ...
2
votes
1answer
261 views

Lazy mount of remote filesystem (with sshfs)

I have a remote computer, and I mount its filesystem with sshfs to my local folder ~/user@host, like that: sshfs user@host: ~/user@host Works nice, but I want to implement "lazy" mount: i.e. I ...
4
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1answer
14k views

channel 1: open failed: administratively prohibited: open failed [duplicate]

I am trying to set up an SSH tunnel (on a Raspberry Pi) with the following command: ssh user@terbank.cs.kuleuven.be -L 5672:tabor.cs.kotnet.leuven.be:5672 -N (I should note that I can, or at least ...
3
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2answers
3k views

Automating backups run from a bash script in Linux the right way

I have a bash script I wrote to backup a Moodle installation. It works fine, I've tested the backups, but there's a problem with it; when I do the backups, since I have to use sudo to type the ...
2
votes
1answer
389 views

View blocked address from sshguard

How can I view all the addresses that sshguard has blocked to iptables?
1
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2answers
374 views

How to fix 'set -o emacs' in .bashrc not working in ssh shell

I work in an LDAP-based user and host network. My user exists on all hosts since it an LDAP user, and my user's home directory exists on all hosts as a mountpoint. I have ~/.bash_profile set up to ...
1
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1answer
160 views

How to fix SSH on OSX?

I have been able to connect to OSX machine using ssh client successfully for hours, but then it stops working and I get connection refused. ps -ax | grep ssh 841 ttys004 0:00.00 grep ssh Using ...
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3answers
176 views

How can I automatically log in to a list of servers to prevent account lockout?

I have started a new contract, and need to have an active account on almost 200 servers. Security has accounts lock after 30 days of inactivity, as well as if you do not log in within 1 hour of ...
21
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2answers
21k views

Terminate dropped SSH sessions

My SSH sessions seem to be dropping though that is not my major problem - the major problem is my previous sessions are still alive, worse yet one of them is running visudo preventing me from ...
1
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1answer
1k views

su to another user using ssh keys?

Assuming that user_A and user_B set up and exchange public ssh keys with each other, is it possible for user_A to su into user_B on the same machine?
9
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3answers
32k views

Logging SSH access attempts

I've configured an ubuntu server with openssh in order to connect to it and execute commands from a remote system like a phone or a laptop. The problem is... I'm probably not the only one. Is there ...
1
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1answer
308 views

Connecting to Github from server

I am trying to connect to Github from a server running Jenkins. To do this, I'm copying my public key from another server, into the authorized_keys on the new server. All I'm getting is the ...
31
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4answers
43k views

Specify identity file (id_rsa) with rsync

I need to make periodic backups of a directory on a remote server which is a virtual machine hosted by a research organisation. They mandate that access to VMs is through ssh keys, which is all good, ...
2
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1answer
237 views

SSH tunnelling outgoing traffic shaping

I am using an OpenSSH server for a client app that uses the traffic forwarding, SSH tunnelling and some users are consuming an extraordinary amount of bandwidth. Is there a way to shape the traffic on ...
5
votes
3answers
13k views

Number of SSH connection(s) on a single linux machine

I landed up in a situation wherein I had to access a Linux machine via puTTY.I made various attempts to SSH but failed to connect to the machine. I then realised my colleague was accessing the same ...
17
votes
3answers
11k views

Get ssh server key fingerprint

Is there a way to programmatically obtain a SSH server key fingerprint without authenticating to it? I'm trying ssh -v user@host false 2>&1 | grep "Server host key", but this hangs waiting for ...
3
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2answers
426 views

Allow a user to run a single command as root over ssh

I have a user account that is not designed for logging in interactively, but want to allow it to run a single command (as root). Is there a better way to accomplish this (without granting more rights ...
4
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3answers
6k views

Why does SSH show protocol as tcp6 *and* tcp in netstat?

$ netstat -nat Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:80 ...
2
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1answer
493 views

SSH Setup - How will the router know my computer's ip?

I'm very new to the networking side of the house and am trying to set up SSH on my new Ubuntu machine. I have my DD-WRT router working with DDNS now and can log in to the router page -- but I'm not ...
6
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1answer
150 views

Tracking my shell path in Emacs

Not a long time ago, I found the following precious snippet that allows Emacs to track my current directory on any ansi-term buffer. More specifically, if I cd <some/path> from within a ...
2
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1answer
1k views

SSH Login Alert Using pam_exec

Hi I have been trying to follow the information about pam_exec from here: Ssh login hook? When a user log's in they get: /etc/pam.d/email-alert.sh failed: exit code 8 My sshd file has this at the ...