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

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8
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1answer
15k views

Executing commands with ssh and shell script using variables on a remote machine

I'd like to execute a command and script located on a remote machine with a script on a local machine. I know it's possible to execute these kind of commands with ssh, so I made: #!/bin/bash ssh ...
5
votes
2answers
1k views

Why does ssh -g say that address is already in use?

I setup an SSH connection with port forwarding that allows remote hosts to connect to the local forwarded ports like this: ssh -g -L 5115:localhost:5115 <server> The connection works fine ...
4
votes
2answers
314 views

777'd some files. How do I repair SSH?

So I'm messing around on a test server and accidentally ran the following (which resulting in SSH breaking): # chmod -R 777 /var Because it's a test server, I'd rather not re-install right now, I ...
2
votes
1answer
149 views

What commands does git use when communicating via ssh?

Using command="" in authorized_keys, I can restrict the commands that can be run by a particular key. What commands do I need to allow in order to have a functioning git remote? From the Pro Git ...
46
votes
2answers
22k views

ssh-add is not persistent between reboots

I add a ssh key to the agent by $ ssh-add ~/.ssh/id_rsa_mac Identity added: /Users/alex/.ssh/id_rsa_mac (/Users/alex/.ssh/id_rsa_mac) After reboot I don't have this key added anymore: $ ssh-add -l ...
0
votes
0answers
466 views

Unable to SSH into Puppy Linux, even though SSHD is running

I installed OpenSSH client and server on my Puppy Linux computer. That computer is behind a router. I tried to ssh into it over the internet (outside the router) but it times out. Also doesn't work if ...
1
vote
0answers
125 views

xtightvnc through ssh gateway — connection refused

Following setup: homepc -> gateway -> workpc workpc:~$ tightvncserver :12 homepc:~$ ssh -N gatewayuser@gateway -L 1212:workpc:5912 Now I try to connect via homepc:~$ xtightvncviewer ...
4
votes
1answer
12k views

SSH: Network is unreachable (caused by router)

I've searched solution in Google for 3 days, when I decided to write here. I have a router, so in my house is WLAN. I use laptop when I stay at home. In another city in my office I have a second ...
1
vote
2answers
1k views

Using exec in find over ssh from shell script

So, I am attempting to execute the following from within a shell script; ssh -q $CUR_HOST "cd $LOGS_DIR; echo cd $LOGS_DIR; find . -name *.log -mmin +1440 -exec gzip {} \; exit" When this runs, it ...
0
votes
2answers
513 views

Locked out of Ubuntu machine

I recently made changes to my EC2/Ubuntu instances by installing OpenSSH, before I was able to SSH just fine, however now I'm getting this error: ssh: connect to host shopious.com port 22: Connection ...
1
vote
5answers
15k views

How to copy a file from a remote network to the local desktop

So I used SSH to remotely login to another computer on a network. I have many files that I would like to copy over to my local desktop. I am trying to follow this How-to : However, I think one ...
0
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0answers
135 views

SSH can't use internet when multiple interfaces present in route

I'm trying to make SSH tunnel connection on any possible interface (which has internet connection). I'm currently using ppp0 and eth0 interfaces. ppp0 always has internet and reinitialized if ...
-3
votes
1answer
562 views

Authentication failed [closed]

You have no controlling tty and no DISPLAY. Cannot read passphrase. warning: Authentication failed. Disconnected (local); authentication cancelled by user (Authentication cancelled by user.). ...
7
votes
3answers
2k views

Weird SSH issue, ssh works with -t but freezes without it

When I ssh into one of my servers, it seems to log in, but then hangs before giving me the prompt (message debug2: shell request accepted on channel 0 is the last log entry). Though the odd thing is ...
4
votes
1answer
350 views

Why do I need to insert the passphrase for an RSA key on a remote host after SSH?

From host B I can SSH various other hosts (C, D) without using any password as I put the public key in the correspondent authorized_keys files (in hosts C and D). From host A I can SSH host B (via ...
3
votes
0answers
108 views

Remote script cleaning up

I run a remote script using ssh: local script: local_command ssh -p 222 user@server 'sh -s' < ./remote_run.sh remote script: some_command & sleep 10000 trap 'echo exiting' SIGINT SIGTERM ...
0
votes
0answers
377 views

Root able to login but non root users are denied - PAM

One of our servers is not letting non-root users login, but root can login without any issues. The following are the messages from /var/log/secure: Jun 24 18:08:43 jonnserver sshd[14470]: debug1: ...
1
vote
1answer
198 views

login scenario and root ssh access block

I'm kinda new to linux so bear with me. I followed a tutorial on how to grant root access to other users and what I did was, in /etc/passwd/ I changed the other users' uid/gid to 0:0. The problem is ...
1
vote
3answers
65k views

why won't x11 display work through ssh login?

I have logged in to a remote server and am trying to display an x application(e.g. firefox). but an error message appears. the below are my attempts to open firefox Black@Black-PC ~ $ ssh -X ...
2
votes
2answers
4k views

Linux can't recognize the right password when ssh'ing?

I've created a local port forwarding and I was trying to ssh into my own port. During the process, I found that my own Linux won't recognize me even when I have the right password ...
1
vote
3answers
1k views

what does this ssh command mean?

Its an answer I got from questioning about port forwarding but I'm not sure what it means.. $ ssh lab_desktop -L 2200:lab_server:22 -vvv my wild guess: first get connect to lab_desktop and then ...
22
votes
2answers
74k views

how to connect ssh 'with' specified port?

I know how to connect 'to' a certain port when ssh'ing. ssh user@remotehostip -p XXX but is there a way to establish a ssh 'with' a certain port? I mean, is there a way to specify the port which ...
3
votes
2answers
1k views

Variable assigned inside ssh command doesn't return proper value

I'm executing the below command in the ssh part of my script. The command is meant to cut the file size from ls option and storing it to a variable. Then print the variable: echo "Enter srouce file"; ...
2
votes
1answer
98 views

how to 'forward' x display data?

this is my situation: there are three computers lab server (CentOS) lab personal computer(window s7) personal laptop(ubuntu) since the lab server only allowed ip address of my desktop at the lab, ...
0
votes
1answer
293 views

Running “gnome-session” or “gnome-panel” over SSH via X yields black bar

I can VNC fine to my machine. But VNC is slow, and to try something else, I wanted to use gnome-session or gnome-panel over SSH via X. But it simply gives me a black bar across the whole screen. No ...
1
vote
2answers
5k views

How to perform a dry-run using rsync over ssh?

I got these errors while trying to perform a dry-run with option -n over ssh on a remote server: # rsync --progress --delete -avhHen ssh /etc/yum root@my.ipaddress:/etc rsync: Failed to exec n: No ...
1
vote
1answer
45 views

What is the correct form of the HostnameSuffixes SSH keyword?

I came across an SSH configuration setting that I've never seen before while following a discussion on an OpenSSH developers' mailing list archive. The particular setting is this: Host * ...
10
votes
2answers
5k views

SSH & ForwardX11 vs ForwardX11Trusted --> beyond my grasp

I am on Ubuntu 14.04 and trying to get my head around ForwardX11 vs ForwardX11Trusted. My default ssh_config contains the following lines: # ForwardX11 no # ForwardX11Trusted yes Further, man ...
2
votes
2answers
158 views

Is it necessary to disown a process for it to continue running after disconnecting?

Would someone be kind enough to explain if & why disown is necessary if you wish to keep a job running even after you disconnect. I ask because every site I have visited says to use disown and bg ...
12
votes
4answers
3k views

Stopping output from a program run in SSH session NOW

Problem I execute command that outputs LOTS of information through SSH. For example, I foolishly add debug information inside a loop that executes million times, or just run cat /dev/urandom for ...
1
vote
1answer
133 views

How do I run a sock proxy via ssh on a non-standard port?

I am running into a bit of trouble accessing a web application running on port 9293 on a remote server only accessible via ssh on port 5634. I've configured FoxyProxy to route all traffic meeting the ...
0
votes
1answer
1k views

How do I log out/disconnect from SSH after starting a process with output to keep it running? [duplicate]

I ran a script from the command line today (php, not sure that matters) which has output I wanted to watch but I had to go home before it finished and I couldn't figure out how to exit without killing ...
2
votes
1answer
346 views

SSH Command behaves differently in Expect Script

I'm using this command on Server1 ~# ssh root@Server2 /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys to append the contents of Server2's id_rsa.pub to the authorized_keys of Server1. It ...
1
vote
1answer
1k views

ssh ubuntu to android : No route to host

I am trying to log into my android phone (running sshdroid), using my laptop (ubuntu 12.04). I am on a university sub-network (on wifi), and so is my phone. I tried the following command: ssh ...
9
votes
3answers
3k views

command line method or programmatically add ssh key to github.com user account

Is there a way to identify with a username and password to github.com servers for the purpose of adding an ssh key to the github user account? So far everything I've read suggests that a user's ssh ...
2
votes
1answer
3k views

SELinux preventing ssh via public key

I have user $USER which is a system user account with an authorized users file. When I have SELinux enabled I am unable to ssh into the server using the public key. If I setenabled 0, $USER can now ...
2
votes
1answer
3k views

Equivalent of scp -l bandwidth_cap for .ssh/config?

Short form: You can limit the bandwidth the scp uses with the -l switch, you pass a number that's in kbits/sec. I'd rather set this in my .ssh/config file for certain names machines. What's the ...
-1
votes
1answer
3k views

Operation timed out SSH to GitHub

I'm trying to organise my ~/.ssh/ folder, so I've created ~/.ssh/git/id_rsa and ~/.ssh/git/id_rsa.pub for my GitHub account. I've also created a config file, as below: Host github.com User ...
0
votes
1answer
42 views

Daemon OpenVPN configuration file with .conf?

In the video, there is one machine connected to another via SSH, where the second OpenVPN daemon is already started and configured with a user/password requested at login: http://youtu.be/tSNCE6j2zxM ...
3
votes
2answers
14k views

MaxStartups and MaxSessions configurations parameter for ssh connections?

I am copying the files from machineB and machineC into machineA as I am running my below shell script on machineA. If the files is not there in machineB then it should be there in machineC for sure ...
4
votes
1answer
3k views

ssh into an account which has no home directory

As a follow up to my previous question, I have decided to create the local user accounts as below. adduser --system --no-create-home USERNAME Now, I would like the local users to be able to access ...
4
votes
1answer
19k views

“sudo: sorry, you must have a tty to run sudo” when using sudo in a remote script

I want to run a series of sudo-elevated commands on a remote machine from an embedded script. To simplify the question, I'm just trying to run sudo id and get it to tell me that it's root. I am ...
1
vote
1answer
383 views

MIT Shared Memory Extension or MIT-SHM over ssh

I successfully created a privileged lxc archlinux container on an archlinux host with lxc. I set up a static ip via dnsmasq and ssh into it and I use xauth to forward X11. I then call programs like ...
1
vote
1answer
167 views

Using a laptop as a bridge between Internet and LAN for SSH connections.

We have a lan and a server running HPUX that isn't connected to the Internet. I have a server and a laptop on the same network. When I plug in the laptop via ethernet cable, its Internet connection ...
7
votes
2answers
2k views

Force command to be run on logout or disconnect?

I'm logging in to a system via SSH and I'd like to be able to force a command to be run on logout, whether that's an intentional logout (exiting the shell) or because my SSH connection has ...
3
votes
2answers
3k views

Help updating OpenSSH to v6.6

My system is vulnerable to OpenSSH Wildcards on AcceptEnv Vulnerability, CVE-2014-2532. I have tried to update openssh to version 6.6 for centos but I can not get repository[sic] for that version. ...
1
vote
1answer
595 views

Compiling OpenSSH client or Dropbear for Android

I have an interesting problem. I'd like to use a private SSH key with my Android Terminal Emulator (jackpal.androidterm). I'd like to install the private key in a fairly-secure location and be able ...
4
votes
3answers
1k views

Using wget over ssh with a terminated session

I have a RaspberryPi. I want to download a big file with wget but the problem is that once I log into the Pi and use wget to download the file, it will abort the download when I close the session. ...
8
votes
2answers
667 views

SSH: which one is my public key

My university asked my SSH public key as I need access to universities computer cluster. I generated SSH key using linux ssh-keygen -t dsa command. However, I don't know what information they need ...
14
votes
4answers
12k views

Autocomplete server names for SSH and SCP

I have a few servers configured in ~/.ssh/config, such as alpha and beta. How might I configure Bash such that the commands ssh al<tab> and scp file.tgz al<tab> autocomplete the names of ...