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

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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 ...
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3answers
8k views

passwordless ssh for another username?

I want to do a passwordless ssh connection for a subversion project. Right now I'm using ssh+svn, and it's a little annoying, because I have to type the password any time I want to transact with the ...
8
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1answer
11k views

How to wget a file to a remote machine over SSH?

I'd like to basically pipe a wget command to a file on a remote server over SSH. How can I do this? I know I could simply ssh into the server and have it download the file, but I'd much rather use the ...
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2answers
2k views

Creating a UNIX account which only executes one command

Is there a way to create a user account in Solaris which allows the users to run one command only? No login shell or anything else. I could possibly do it with /usr/bin/false in /etc/passwd and just ...
8
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2answers
739 views

View Script Over SSH?

A friend, using a remote machine, SSHed to my machine and ran the following python script: while (1): ....print "hello world" (this script simply prints 'hello world' continuously). I am now ...
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2answers
4k views

What difference between openssh key and putty key?

I've found ssh-keygen ("ssh" package) comand produce another keys that puttygen command ("putty" package). If I create public and private keys with ssh-keygen some ssh-servers can not accept my keys. ...
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5answers
9k views

Can a linux user change their password without knowing the current password?

I'm setting up a few ubuntu boxes, and using opscode's chef as a configuration tool. It would be fairly easy to install public keys for each user on each of these servers, and disable password ...
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2answers
1k views

How do I background an SSH session? [duplicate]

Possible Duplicate: How can I break away from an SSH session that has crashed? I have started an SSH session on the command line, but now I want to get back to my local command line. For ...
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3answers
11k views

Can I connect to Windows machine from Linux shell?

I can connect to Linux machines from Windows using PuTTY/SSH. I want to do the other way round - connect to a Windows machine from Linux. Is this possible?
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2answers
10k views

Use ssh with a specific network interface

I'm using openconnect to connect to vpn. After entering my credentials, I get this: POST https://domain.name/... Got CONNECT response: HTTP/1.1 200 OK CSTP connected. DPD 30, Keepalive 30 Connected ...
8
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1answer
2k views

Convert OpenSSH private key into SSH2 private key

Is there a way to convert existing pair of OpenSSH keys to the SSH2 (ssh.com format) pair of keys? UPD: since there are some answers about ssh-keygen suddenly appeared, I'll explain where I came ...
8
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1answer
165 views

Does ssh-agent store my passphrase?

Is it possible to determine the passphrases of private keys added to ssh-agent? I'm thinking along the lines of someone with root privileges trying to find out my passphrase after I have added the ...
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3answers
2k views

How to execute a remote command on a local file?

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 ...
8
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4answers
386 views

Good practice to use same SSH keypair on multiple machines?

I recently got a new laptop for work, and I was wondering whether it'd be good practice to keep using the same RSA keypair as I'm using on my old work laptop. I'd really like to not have to create ...
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2answers
2k views

How to restrict an SSH user to only allow SSH-tunneling?

How can I restrict a user on the ssh server to allow them only the priviledges for SSH TUNNELING? i.e. So they cannot run commands even if they log in via ssh. My Linux servers are Ubuntu 11.04 and ...
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2answers
2k views

Ssh login hook?

Is there a way to run a script/command every time a user connects using ssh? Can it be configured globally (i.e run the script when any user login)? I came across this question on Identica, but there ...
8
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1answer
849 views

Bash autocomplete in ssh session

It seems that bash doesn't want to autocomplete commands (what's annoying me right now is not autocompleting apt-get) when I'm logged into my machine from SSH. Is there some setting that will allow ...
8
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2answers
1k views

How to efficiently use 3D via a remote connection?

I have one weak PC (client) but with acceptable 3D performance, and one strong PC (server) which should be capable of running an application using OpenGL twice, i.e. once locally and once remotely for ...
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3answers
2k views

Tell SSH to use a graphical prompt for key passphrase

How can I force SSH to request passphrases using a graphical prompt (GTK, for example) instead of the standard one that uses the terminal? I tried setting SSH_ASKPASS=/usr/bin/ssh-askpass but it ...
8
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1answer
660 views

Best Practices for SSH, tmux & GnuPG Agent

I'm attempting to consolidate my encryption software to GnuPG, and I'm running into a confusing problem. My primary unit is a headless server, and I exclusively work in tmux. There is no X session, ...
7
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4answers
601 views

Is there a way to check a users SSH key to see if the passphrase is blank

I'm looking to lock down our Solaris 10, RHEL 5, and SLES 11.2 servers. It has come to my attention that some of the users have no passphrase for their SSH keys. Is there a way I can check for this ...
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2answers
3k views

ssh port forward to access my home machine from anywhere

http://serverfault.com/questions/303937/how-to-make-freebsd-box-accessible-from-internet I want to understand this whole process of port forwarding. I read so many things but failing to understand ...
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2answers
7k views

Starting firefox on a remote host (over ssh) opens a new window locally: what is happening?

I have never noticed this behaviour before, and am a little confused as to what is happening. I have a local copy of firefox running, then ssh (ssh -X <url>) into a remote server and start a ...
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2answers
327 views

Continue shell commands once connected to SSH

Not sure if the question I'm asking is correct but basically I wanted to automate this process scp ~/.ssh/id_rsa.pub username@example.com:~/ ssh username@example.com mkdir .ssh cat id_rsa.pub ...
7
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3answers
374 views

Pass my credentials from a ssh session to another ssh session

I want to ssh from A to B, using a particular private key that I have in A. Then I want to ssh from B to C using the same credentials that I used to ssh into B. Is it possible to "pass" the ...
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3answers
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Can I connect to or view abandoned ssh sessions?

I have a virtual instance of redhat running that I can ssh to from any host on the corporate network. My ssh session was dropped while running some scripts that may or not have caused me to ...
7
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1answer
716 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 ...
7
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1answer
608 views

Given a private SSH key, how do I recover my public key?

I've somehow lost my id_rsa.pub file. I still have my id_rsa file. How do I recover the public key from the private key? (This question came up after ssh-copy-id was reporting "ERROR: No identities ...
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2answers
4k views

How can I set up SSH on Linux to log in password-less?

My Raspberry Pi is running the default Debian image and has SSH enabled. I log into my Pi as follows: ssh pi@<IP-address-of-my-Pi> I have to enter my password every time. Can I somehow make ...
7
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3answers
572 views

Prevent a unix account from being able to SSH [duplicate]

Possible Duplicate: Disable direct login for normal users (like oracle) in linux but allow scp and sftp? I want to prevent a unix account from being able to be SSH'ed with, but it should ...
7
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6answers
9k views

How to run commands in batch mode over ssh?

How can I run commands in batch mode over ssh? That is, what is the ssh command's equivalent of sftp -b <filename> <hostname>? I have a set of commands which I wish to run across a set of ...
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3answers
3k views

Copying protected files between servers in one line?

I'd like to copy squid.conf from one server to another. The servers don't talk to each other. I'd like to go through my workstation. Both servers have the file, so it will be overwritten on the ...
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3answers
5k views

ssh prompts for password despite ssh-copy-id

I've been using public key authentication on a remote server for some time now for remote shell use as well as for sshfs mounts. After forcing a umount of my sshfs directory, I noticed that ssh began ...
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3answers
4k views

Give user permissions to all files and folders

I want to have a user who has access to all the files and folders on the system. This is for the purpose of using RSYNC on a local machine to backup a remote machine. At the moment we are using the ...
7
votes
1answer
900 views

How to detect when a shell is owned by a remote SSH session?

My question is similar to this one, but I'm looking for something slightly different. I have a notebook PC that I use to access Linux machines on a network in two different scenarios: I have a ...
7
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3answers
2k views

how to ssh to remote server and use local emacs to edit files?

Is there a way to use the emacs installed my local computer to access remote files I have in a remote server? I have googled and found out that I should use TrampMode however it is necessary for me to ...
7
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1answer
701 views

Must an X11 server be installed for X11 forwarding over ssh to work?

I would expect that my local X11 server and sshd X11 forwarding turned on is all that is needed for X11 over ssh to work, but I haven't been able to get it. Am I wrong about this? Does the remote ...
7
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4answers
2k views

Disable colours on terminal and SSH

My local Linux machine has coloured terminal output like this; When I SSH to a pfSense/BSD box it changes the colours like this; Even when I SSH from to a machine that doesn't have a coloured ...
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2answers
9k views

How to edit authorized_keys?

What is the best method for editing the /root/.ssh/authorized_keys file? I mean if I need to append a new key to my authorized_keys file, than what are the best methods to do that?
7
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1answer
383 views

self-recovering ssh tunnel over non-100% connection

I want to setup permanent ssh-tunnel for port forwarding to machine behind firewall. The connection is between university network (very reliable) and commercial microwave metropolitan connection to a ...
7
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1answer
631 views

What steps does the system go through when handling an SSH connection?

What steps does the system go through when handling an SSH connection? We try to log in via ssh sshd starts pam and pam module to authenticate us Depending on pam configuration, we need to provide ...
7
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1answer
952 views

Forward all ports SSH

I have a question about SSH/Port forwarding. I haven't found the solution anywhere and don't know if there is any. I have a server behind my NAT box at home. I have port forwarding from my NAT box to ...
7
votes
1answer
5k views

Switch VI to use backspace key instead of Control+H for backspace?

I'm on Solaris 10 and by default vi version SVR4.0, Solaris 2.5.0 is installed. The system was set up so that when I ssh to it Control+H does backspace, and backspace outputs ^? I added stty erase ...
7
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1answer
150 views

Managing and applying custom updates to multiple identical machines

I work at a library where we have just recently setup 5 kiosk's based on linuxmint. The hardware is identical. I actually used DD to make an image after I set the first one up. My Problem is, I now ...
7
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4answers
918 views

How to set up two-factor authentication with OTP on FreeBSD?

I have a FreeBSD hosted server that I like to be able to get to from anywhere. Normally I use SSH publickey to log in, or if I don't have my SSH private key available then I might use regular password ...
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3answers
4k views

How can I set up smart card SSH authentication?

I would like to be able to SSH to my machine using a Gemalto .NET Smart Card as the authentication method. How could this be done on a Fedora 13 (or generic Red Hat style) machine? These are the ...
7
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4answers
362 views

Failing to block brute force ssh with iptables

I'm trying to block (slow down) brute force attacks on my sshd server. I'm following this guide http://www.rackaid.com/resources/how-to-block-ssh-brute-force-attacks/ which basically says I need to ...
7
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1answer
321 views

How can I limit ssh *remote* port forwarding?

I need to limit which ports can be remotely 'ssh -R' forwarded by an user. I know about permitopen option on authorized_keys, but as it says on man page it only limits local 'ssh -L' port forwarding ...
7
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1answer
2k views

Nested ssh session inside screen has no color

I am attempting to keep a nested ssh session inside of a byobu/screen window, which I also connect to over SSH with Putty on Windows. However the nested SSH session has no color. Here's what I'm ...
7
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3answers
253 views

OpenSSH - map aliases in ~/.ssh/config to IP addresses in command line

Is it possible to query ~/.ssh/config in the command line? Let's say I would like to retrieve what IP address does the particular alias point to in a separate program, is it possible?