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

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4
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2answers
3k views

Unable to get the right exit code from a script

I have a script which connects to a remote server via SFTP and get some file from there. My script goes like this: /usr/bin/sftp USER@remote.server.com <<EOF lcd /dir1/dir2/dir3 cd ...
1
vote
1answer
149 views

osx server, windows client, running emacs opens it on server not client

I've installed emacsformacosx on my OSX box. I'd like to shove my macmini in a data center and run it headless. I've gotten x-windows working. If I run xeyes, it displays on my Windows 7 client. ...
23
votes
1answer
27k views

Use different username by default for a specific host

I have a different (assigned, non-changable) username on one of the servers I log to regularly, and I would like to avoid writing it down every time. Can I make these lines [tohecz@localhost ~]$ ssh ...
1
vote
1answer
9k views

Login via ssh without password, getting authorized_keys file removed after first login attempt

I'm trying to configure passwordless login via ssh. I have Centos 6.5 This what I did: copied content of id_rsa.pub from my client machine to ~/.ssh/authorized_keys set permissions 700 to ~/.ssh and ...
6
votes
1answer
136 views

Send only one warning when the private key is not available

For added security, I would like to require a private key to use sudo on my Ubuntu Server box. I've added private key authentication for sudo as described at ...
1
vote
1answer
2k views

scp to Local Machine After SSHing [duplicate]

From my local machine I can copy files from a remote machine scp remote:/some/file/path ~ But what if I'm already SSHed into the remote machine? Can I do something like this ssh remote cd ...
0
votes
1answer
296 views

Unrar local files to remote server [duplicate]

I have two Linux servers, one which has several RAR files and another empty one. I would like to extract the archives and move the content to Server 2. The problem is: I do not have enough storage to ...
3
votes
1answer
183 views

Unrar local files to remote server

I have two Linux servers, one which has several RAR files and another empty one. I would like to extract the archives and move the content to Server 2. The problem is: I do not have enough storage to ...
2
votes
1answer
2k views

Shellscript! Syntax error: unexpected “(”

Update: After the changes from the first answer I got some more error codes. : not found: line 23: { esxidown.sh: line 24: redir error Insufficient arguments. : not found: line 26: esxidown.sh: ...
1
vote
1answer
768 views

autossh won't run in background

I try to set autossh to run at boot adding it to /etc/rc.local but I am unable to even get it to run in the background. This is the crucial part of my config file: Host remotehost.com LocalForward ...
2
votes
2answers
192 views

using ssh-agent

I have my desktop in the office. When X starts, ssh-agent starts automatically. I have to add my SSH key once, at the beginning, and then I can use ssh without having to enter my password each time. ...
2
votes
2answers
1k views

How is using a public-key for logging in to SSH any better than using a password?

I'm not asking about password vs key authentication. I've seen a few times (and even Amazons AWS) says that even if SSH has a major vulnerability that key authentication would make such an exploit ...
6
votes
3answers
3k views

How to prevent “Last Login:” message from showing up when using sftp?

In Ubuntu GNU/Linux 12.04, I have a user johndoe that is part of an sftponly group, set up to sftp to a chroot jail using Subsystem sftp internal-sftp Match Group sftponly ChrootDirectory %h ...
6
votes
2answers
3k views

Force ssh to always use SSH_ASKPASS

I want to force ssh to always use the program specified by SSH_ASKPASS. In my case the program is just a bash script returning the passphrase. The problem is, as the ssh documentation says: If ...
2
votes
2answers
621 views

SSH: “Connection closed by remote host” randomly while working on an interactive session

I am working on a remote server, on which I do numerical simulation using the OpenFOAM computational fluid dynamics library. I built a collection of Python scripts to automate my parametric studies ...
2
votes
1answer
172 views

Problem on running Script on host after connecting

I am new to linux scripting. Please help. I searched on below a lot but was not able to find appropriate answer : I am trying to make a script which I will later schedule as cronjob, so that it keeps ...
1
vote
3answers
284 views

Why does SSH have unsecure defaults?

Why does SSH come with such an unsecure default configuration? to name what I consider unsecure defaults: root login enabled on SSH SSH protocol version 1 (which is vulnerable to MIM attacks) ...
2
votes
1answer
687 views

rkhunter /usr/bin/ssh && /usr/sbin/sshd [Warning]

My last rkhuter scan reported a couple of warnings that deserve to be checked(for my noob eyes). Main reason for my suspect is that i wasn't on the machine at (03-Apr-2014 01:12:12) ->AM I googled ...
3
votes
1answer
132 views

Port forwarding with ssh where the final destination does not have sshd running

I know how to use ssh to port forward a local port say like 7000 to a remote ssh server on port 50070. For example: ssh -L 7000:127.0.01:50070 root@sshserver "Me port 7000" - > "ssherver port ...
3
votes
2answers
79 views

Is there a one liner which can list public key fingerprints with authorized_keys as input?

I'd like to audit the authorized_keys file on a number of servers and match them with known AWS key fingerprints. Is there a one-liner which incorporates ssh-keygen -lf which will output the ...
2
votes
1answer
657 views

Monitor SSH data transmission, and close connection if no data is flowing

For our file transmission and manual storage we have a simple RHEL server on which all other Linux clients are connecting by SSH. Whenever any client wants to access/store data, they connect to the ...
3
votes
0answers
8k views

fatal: bad ownership or modes for chroot directory component “/”

I used to be able to connect via ssh with the user I have created but now I keep getting: "Write Failed: Broken Pipe" and I can only connect as root In the ssh auth.log I get the following: ...
2
votes
1answer
151 views

Why VMware DHCP persists getting offline?

I am trying to set up a SSH server in my remote machine which is running Windows 7 on it currently. So first I set up a Oracle VirtualBox but it did not work for me properly. Then I decided to go with ...
3
votes
2answers
11k views

Easiest way to mount Google Cloud Storage in CentOS

we use centos for some hosting projects, but nut very expertise with systems. We pretend to use a main CentOS box to mount an "unlimited" Google Cloud Drive and then share it via NFS to the rest of ...
3
votes
2answers
4k views

How do I run a command on a TTY from a SSH session?

Does anyone know of a way that I could run a command from my ssh session and have it display on tty1? It seems like I could do that like: script command >> /dev/tty1. However, if I were to do ...
10
votes
3answers
19k views

ssh from host to guest using qemu

How do I setup ssh from the host to the guest using qemu? I am able to use port redirection when I boot the VM without any special parameters, as follows: /usr/bin/qemu-system-x86_64 -hda ubuntu1204 ...
0
votes
1answer
742 views

Zsh ssh tab completion not working as expected on OS X

I use Zsh on two different machines (OS X and Ubuntu) and the tab completion for ssh does not work the same way. More specifically hosts specified in the file ~/.ssh/config is NOT used on OS X but it ...
2
votes
2answers
2k views

About escape with SSH pipe

I want to execute the awk command with long parameters,like this: ssh host "netstat -rn|awk 'NR!=1 && NF>=6 && $1!="Destination" {printf "%-15s %-20s\n", $1, $2}'|sort -f " but ...
0
votes
2answers
3k views

How to edit /etc/hosts without sudo?

I have a machine that I can only access using SSH. I was messing with the hostnames, and now it says: ssh: unable to resolve hostname I know how to fix it in /etc/hosts. Problem is, I need sudo ...
3
votes
1answer
148 views

Transfer files client-server inside a SSH session [duplicate]

Is it possible to transfer files (client-server) from inside a ssh session?. I know how to transfer files using SCP, This question is about transference from inside a ssh session. For example I ...
1
vote
1answer
249 views

How to check for a folder inside a particular folder in shell script?

I am working on a shell script and python script as well. Python script is passing certain parameters to my shell script and then I am using those parameters in my shell script. Below is my shell ...
2
votes
1answer
1k views

root login silently fails

After some months of not touching it I wanted to login to one of our virtual servers to update OpenSSL, because of the heartbleed thing. The server is running Debian 7, sudo is not installed. I ...
2
votes
3answers
1k views

Does /var/log/secure log successes?

Short one that I've been unable to find a decent answer for. Centos 5.10 server, trying to trawl through all the logs I can to see what IPs successfully accessed the server. I've been mucking about ...
2
votes
1answer
1k views

Create ssh user which can only access home directory [duplicate]

I read documentation on the internet on how to create a new user with SSH access. I figured it out and to create a user is quite simple. The next step I want to take is to jail this ssh server to the ...
3
votes
1answer
9k views

CentOS Local User not able to view directories/files via FTP login

Currently running CentOS 6.5 with vsftpd. As a newbie, I would like to explain my process and then have the proper process explained back to me from scratch which I believe will solve my issue. I am ...
3
votes
2answers
1k views

How to ssh to a server using another server with key from the second server?

How to configure ssh to imitate this: ssh server1-user-name@server1.net -i /path/to/.ssh/server-1-ssh-key -t ssh server2-user-name@10.0.0.10 -i /home/server1-user-name/.ssh/server2-ssh-key When I ...
0
votes
2answers
424 views

SSH Key not working [duplicate]

I created an SSH key on my laptop using ssh-keygen and then put it on some production servers so that I don' have to type my password every time. On some servers it is working well, but on some it's ...
1
vote
1answer
518 views

How does ssh pick which key to use?

I'm using the following as a forced command with hg-ssh. This forced command is designed to just allow pushes with hg. However, I must be doing something wrong, because I can actually log in with ...
2
votes
1answer
119 views

Commandline program affecting subsequent shell output with underlines?

I'm SSHing via Windows PuTTY to my server running Ubuntu Server 12.04. As you can see in the top of the screenshot, the terminal looks normal but when I run Behat (a PHP test automation framework), ...
3
votes
1answer
5k views

passwordless ssh is not working in CentOS 6.4?

I am setting up passwordless login from this link but I can't get it to work. When I do ssh localhost it always asks for a password. I have also referred to this question: ssh password less ...
0
votes
1answer
317 views

Error “ssh_exchange_identification” with Corkscrew

I'm trying to reach my ssh server (i'm behind a corporate proxy) so I tried to use Corkscrew. My ssh server is listening on port 443, I put sshd: ALL in my /etc/hosts.allow and there's nothing into my ...
1
vote
1answer
76 views

Acting on a different display when using SSH [duplicate]

I am connecting to a Linux CentOS 2.6 computer via SSH wit the display deported on my screen (using MobaXterm). It is also possible to access to this computer "physically". However, I would like a ...
2
votes
3answers
288 views

Get exit status of a process over SSH

Not sure how to google this (I tried with some things and didn't get much) or how this is even called. This is my typical workflow: SSH to a server run something there and leave it running in ...
1
vote
2answers
763 views

Create a user that can only connect to a specific directory

I've created a SSH folder for some friends. I've created the users to log in via SSH, but they connect to ~ how can I set to which folder they can connect? I have a directory called /usbdrv/ which ...
0
votes
1answer
5k views

No xauth data; using fake authentication. Unable to display remote windows

Whenever I try to ssh -X or -Y into a remote Linux server from my Mac (OSX Mavericks) machine, I get the same message: "Warning: No xauth data; using fake authentication data for X11 ...
13
votes
6answers
8k views

SSH automatic remote back ups

I have two machines, A and B. Machine A can ssh into B. A has a lot of free space. B's data is in a sort of risky situation. How do I back up all of B's data to A automatically. It does not have to ...
1
vote
1answer
2k views

Understand debug messages from sshd [closed]

I'm using OpenSSH_5.8p1 in my machine,I'm connecting my machine using putty client but its slower so I have ran sshd in debug mode and found following messages can any one explain me in detail about ...
0
votes
2answers
43 views

ssh to a new user in ubuntu

I created an user in ubuntu and now I want to do ssh with that user. I'm able to do ssh but I'm not getting in the shell: myUserName@myMachineName:path$ I just get: $ And I don't see the path ...
20
votes
4answers
46k views

History of IP addresses that accesed a server via ssh

It has come to my attention that a server of mine has been hacked and infected with a known chinese botnet. It was a prototype/testing virtual machine with its own static IP(US address) so no harm ...
2
votes
1answer
13k views

How to resolve ssh connection refused on AIX?

I am no longer successfully able to connect to my AIX LPAR. ssh -v user@<ip> OpenSSH_6.2p2, OpenSSL 1.0.1c 10 May 2012 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to ...