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

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3
votes
1answer
583 views

Can I execute commands from a midnight commander ssh connection?

When I connect to a VPS via a Shell link in MC, the location of the command prompt remains at my local box. I would like to be able to execute commands (e.g. mkdir, tar/untar) directly from the ...
10
votes
3answers
14k views

Why does my X11 forwarding attempt fail with “connect /tmp/.X11-unix/X0: No such file or directory”?

On my local machine, I run: ssh -X me@remotemachine.com (For completeness, I have also tested all of the following using -Y with identical results). As expected, this accesses remotemachine.com ...
2
votes
2answers
1k views

Setup ssh tunnelling to browse using the IP of a computer inside a private network

I think my question is much easier to understand looking at the draw below. The idea is that for some reasons (such like accessing the intranet of my company, or getting access to some web pages that ...
3
votes
3answers
128 views

monitor and watch multiple systems continuously

As part of my work and collaborations and universities I've attended, I have access to many machines, about 13 or so. These are all Linux machines and I could ssh using my key-pair. There are a bunch ...
39
votes
4answers
33k views

What is the point of sshd “UseDNS” option?

I know what it does, but i don't know why. What attack(s) does it prevent ? Is it relevant for all kind of authentication methods ? (hostbased, password, publickey, keyboard-interactive ...)
3
votes
1answer
512 views

How to set up SSH on Ubuntu desktop and bind sub-domain to it for remote access outside network?

I am pretty to new to SSH and I have a question regarding access to my machine outside network. I have a Linux machine sitting in my apartment running almost all the time and connect to the network ...
0
votes
4answers
782 views

securing SSH and disabling direct root

In these instructions below what appears on my terminal is different so not sure what I should change. After port 22 mine says #AddressFamily any and further down for protocol it has longer line ...
0
votes
2answers
4k views

SSH connection refused

I have a CentOS Linux server with a SSH connection. It works perfectly but from time to time, the server refuses the connection. If I reboot the server, I can SSH again. What could be wrong?
1
vote
2answers
348 views

Can SSH-Agent work from a remote bash script?

Server A needs to connect over svn+ssh to Server B to grab some source files for deploying on Server A. My deployment script runs from my local dev machine via: ssh serverA 'bash -s' < deploy.sh ...
3
votes
1answer
162 views

How to tell where recent ssh sessions originated from?

I know that sometimes when I login to systems they print out where the most recent ssh session originated from (usually an ip address or hostname). How can I lookup where some of the most recent ssh ...
3
votes
2answers
2k views

Printing a file from local computer using printer connected to remote server

On the remote server, I use lp command to print documents. I can connect to this server through SSH. How can I print a file directly from my local computer using that printer?
2
votes
1answer
2k views

Script to get file from SFTP and run it

We have 5 servers running our code: A, B , C, D and E. From a local machine, we sftp the file to A. Then ssh id@A su - applicationname sftp id@A get <file> bye tar -xzf <file> logout ...
2
votes
1answer
412 views

Directory sync across SSHFS involving symlinks

I have 2 Ubuntu Linux boxes with similar directory structures, LX02 and LX04. When I ssh from a terminal on LX02 to LX04 and go to my main scripting directory, /root/sbin, I see a different set of ...
3
votes
2answers
759 views

SSH connection timing out [closed]

I am trying to connect to an external host that is living in the Internet. From my laptop I can ssh fine. From an Ubuntu 12.10 server, the connection times out. Since they're in the same network, ...
2
votes
1answer
481 views

How to associate only one public key with a restricted shell like scponly?

I'd like to use a passwordless key to perform e.g. unison synchronization while being able to SSH into the server only with a password-protected key. The usual way of using scponly is changig the ...
3
votes
1answer
386 views

Can emacs use gpg-agent in a terminal at all?

I understand that there are problems with getting pinentry-curses to work with emacs (see some of the comments on http://emacswiki.org/emacs/EasyPG), and so using emacs in a terminal isn't compatible ...
5
votes
3answers
901 views

Run ssh login command without modifying remote .bashrc

We have a bunch of servers set up with set -o vi in their ~/.bashrc. It would be nice to be able to ssh into these boxes and automagically run set -o emacs as a timesave. I've seen a solution ...
0
votes
1answer
158 views

Can Bash Emacs shortcuts be enabled over SSH?

I find Bash keyboard shortcuts such as Ctrl-a (jump to start of line), Ctrl-k (cut text following caret), Ctrl-n/Ctrl-p (next/previous line in command history) immeasurably useful in day-to-day CLI ...
2
votes
2answers
526 views

How to stop a infinite running process (ztail) started by a ssh session after that session is closed

I have a peculiar problem. My server supports multiple ssh session simultaneously, so that multiple admins can manage (via command line interface) it simultaneously. We have a command which calls ...
1
vote
1answer
1k views

How do I SSH into my Samba file server?

So I made a dedicated Samba file server on my Debian(3.2) machine. I have had great success accessing it from both Windows and Unix. I can SSH into it on the local network. When I try to SSH into it ...
4
votes
2answers
5k views

How to attach to remote machine's local display session over ssh?

Scenario: Linux mint is running on a machine at my home. I have some gui applications open on it. I'm away from home but want to get at the open applications. I have cygwin/x and I know how to ssh ...
2
votes
1answer
142 views

is it secure /not dangerous to ssh with keys through public transparent proxy?

I use pub key for ssh. Is it normal practice to connect to own server through public proxy? I think with plain pass it is surely dangerous but how about RSA keys?
2
votes
3answers
533 views

how to allow SSH connection with a password instead of key exchange.

I need to connect to a remote host over ssh. The client doesn't support ssh key method but able to connect to remote but get disconnected with an error "no supported authentication methods available". ...
7
votes
5answers
22k views

Disable user shell for security reasons

We have several user accounts that we create for automated tasks that require fine-grained permissions, such as file transfer across systems, monitoring, etc. How do we lock down these user accounts ...
0
votes
1answer
479 views

Quotes exercise - how to do ssh inside ssh whilst running sql inside second ssh? [duplicate]

Possible Duplicate: Quoting in ssh $host $FOO and ssh $host “sudo su user -c $FOO” type constructs Wrapping a command that includes single and double quotes for another command I want to ...
9
votes
1answer
1k views

Why does SSH not consult /etc/hosts?

I'm administrating a networked environment where the users authenticate over NIS. All machines can be used to SSH into the server but one. On the machine in question, I get the message ssh: connect ...
0
votes
2answers
279 views

public key authentification doesn't pass, why?

I'm trying to connect to Server with ssh and id_rsa key. That key is only key in authorized_keys (just added with ssh-copy-id) When i do connect, server ask doesnt end with keys but always ask for ...
4
votes
3answers
1k views

rsync server/daemon security

I have a NAS (Netgear Readynas NV+) at home and a linux (Arch) box at work that is always on. The linux box is already running an ssh server/daemon and the NAS is already running an rsync ...
4
votes
1answer
991 views

How does X11 forwarding work?

How does X11 forwarding work? I am interested in knowing whether the processing to render graphics is done at the end of the host running the application or the host displaying the graphical ...
2
votes
1answer
1k views

SCP and/or SSH command with password in line

First, I'm TRYING to use rsa keys because I'm using the script to create RSA keys, but initially I have to connect to the remote machine to pass over the newly generated authentication key. Having ...
1
vote
0answers
65 views

Run a script (for an app GUI) when logged from NX but limit shell commands on terminal

I have a user which will be accessing an app GUI via NX NoMachine. I want to allow this user to execute the command to bring up the app GUI (done automatically by NX) BUT prevent him from executing ...
5
votes
2answers
13k views

Sending function keys (F1-F12) over SSH

I have a Fedora machine that I can SSH to. One of the programs I'd like to use occasionally uses the function keys. The problem is that I'm SSH'ing from an Android tablet (ASUS Transformer Infinity) ...
0
votes
3answers
706 views

Unable to ssh out from my laptop

I'm unable to ssh from a particular machine, either from my Ubuntu 12.04 install or my Windows Vista install (using putty). I'm trying to ssh into a remote machine where I have an account, but I keep ...
3
votes
2answers
17k views

How to restrict ssh users to browse only /home/%u contents

Can I confine my users to their /home/%u directory using only OpenSSH configuration? From instructions I found on the Internet, I stopped the SSH server and appended the following to the sshd_config ...
3
votes
3answers
3k views

How to limit ssh access for localhost only?

I need to forbid ssh access (except localhost) for specified user. So. ssh localhost should work. ssh hostname from outside should not work for that user. All other users should work as usual.
2
votes
4answers
382 views

change to text console using ssh

I'm connecting to target computer through SSH from command line. Target computer is running Gnome. I need to be able to tell the target computer to change its desktop to a fullscreen text console ...
4
votes
2answers
451 views

light weight disk based backup solution

Currently I am using Dirvish to backup a handful remote machines, both Linux and Windows to local disks. But Dirvish hasn't seen any updates for many years and it has a couple of small annoyances ...
5
votes
2answers
964 views

How to disable login for an user?

My Linux has many not-human users like cron, ntp, daemon, http, etc. I want to disable anybody to login as any of this users. Real people on my machine are root and me, so only root and me should be ...
4
votes
3answers
394 views

systemd service that needs .ssh/id_dsa password

I have a systemctl service that starts a process smd-loop in a screen session. This process requires acces to remote SSH sources (for syncing purposes) and thus needs to be able to access my id_dsa ...
12
votes
3answers
7k views

How to execute a remote command and pass in local file as input?

Is it possible to do this: ssh user@socket command /path/to/file/on/local/machine That is to say, I want to execute a remote command using a local file in one step, without first using scp to copy ...
4
votes
1answer
2k views

How to fix unison failing with “Fatal error: Internal error: New archives are not identical” for identical paths?

When trying to sync two paths (one of which is remote) via ssh, unison fails with Fatal error: Internal error: New archives are not identical. while syncing via a network mount works just fine. ...
2
votes
2answers
1k views

SSH public key login: two different keys and SSH_AUTH_SOCK behaviour

A user (user1) on an Ubuntu 12.04 desktop has two SSH RSA keys configured: ~/.ssh/id_rsa and ~/.ssh/id_rsa1 (and .pub files). Both public keys are configured in the authorised keys on the server's ...
14
votes
4answers
9k views

How can I solve this ssh-agent problem?

I'm using Linux Mint, and have not been able to get gnome-keyring to unlock automatically at login, it seems. A symptom of my problem is as follows: $ ssh-add Identity added: /home/me/.ssh/id_rsa ...
0
votes
1answer
929 views

Why does sshd accept local network inbound connections and refuse external inbound connection?

When I try to connect to my server from the internet, I always get: debug2: ssh_connect: needpriv 0 debug1: connect to address XX.XX.XX.69 port 22: Connection refused ssh: connect to host XX.XX.XX.69 ...
10
votes
1answer
770 views

Redirect linux console on boot

Is it possible on boot to redirect the console output to a screen session? The server has no monitor attached, and I'd like to be able to see the primary console output. I've seen other posts about ...
11
votes
2answers
989 views

Understanding SSH tunnels

I have linux (Ubuntu) server which I have root access to through ssh (port 22) only. On that server there is a MySQL database listening on port 3306. Is it possible to use putty (on my machine) and ...
4
votes
3answers
1k views

How to append / extend zshell completions?

I am using zsh with oh-my-zsh. Unfortunately, oh-my-zsh does not use file ~/.ssh/config for hostname auto-completion (see Issue #1009, for instance). This could easily archived by the following code: ...
11
votes
1answer
3k views

How to use ssh-agent with multiple (valid) keys and yet choose which one to use?

Let's say there are two keys A and B, both of which are valid for user@host public key authentication. Since authorized_keys is configured for different behaviour depending on the key, ~/.ssh/config ...
6
votes
3answers
5k views

A Web ssh/telnet client

I'm in kind of a tight spot right now. I wanted to know if someone has seen a HTML, or PHP web ssh client as both my company and school block everything besides port 80. I'm a control freak when it ...
0
votes
2answers
685 views

Ssh through two servers and a user in one command line [duplicate]

Possible Duplicate: How do I connect to a pc through another pc using ssh How to go about doing in one command line the following operations? $ ssh server-one $ su - user $ ssh server-two ...