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

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8
votes
4answers
33k views

Pseudo-terminal will not be allocated because stdin is not a terminal

I'm trying to set up automatic SSH hopping through a server which doesn't have nc. This works from the command line: ssh -A gateway ssh steve@target (I have added my public key to the SSH agent). ...
4
votes
3answers
204 views

Can I recursively print all current remote shells?

Is there a way to print out all of the local and remote shells I am currently in, recursively? For example, on my local machine, I will ssh into another machine. From there, I may switch users (...
4
votes
4answers
8k views

List of servers to check for SSH availability

I have a list of IP address that I need to SSH to and log if I could get to them. I would use a Ping script, but DNS might have already reassigned the address. I do not care about the ones I can't get ...
5
votes
7answers
556 views

Are there additional ways to protect SSH connections besides firewall and RSA Keys?

Sometimes I don't have a static IP and need to administrate my web server remotely. I'm looking for any additional layers of protection I could add to make opening port 22 safer. Currently I have ...
2
votes
1answer
486 views

vim and tmux are conflicting. How can I fix this? [duplicate]

I'm having a painful experience with tmux. I'm using solarized in vim but when I run tmux then my vim configuration does not work. It's as if solarized is not configured in my .vimrc. Out of tmux ...
4
votes
1answer
4k views

How can I create a shortcut to resize panes in a tmux window?

I am having lots of issues with tmux in mac. Another problem I have is that I can not bind a key in my tmux.conf to be able to resize my panes. What I need is the CTRL-b: resize-pane -U 10 I currently ...
3
votes
1answer
896 views

Public-Key Authentication w/ Jailed SFTP User

I'm trying to set up a jailed SFTP user account on my own local machine to test an application with libcurl. I used this guide to help me figure out how to set up a jailed SFTP user: http://www....
1
vote
1answer
5k views

iptables prevents connection via ssh after port change despite ACCEPT rule

I have two machines hooked up to a router, one Windows with PuTTY, and one CentOS 6.4 with sshd and with the default SELinux still enabled. They can both ping each other successfully. I installed ...
27
votes
6answers
40k views

How can I page up or down in tmux with Terminal.app?

When I am in tmux only a portion of the text shows up. If I try to scroll up or down the console scrolls up but not the actual text. If I do CTRL+b followed by [, I see in the status bar *tmux, and If ...
4
votes
4answers
767 views

Are commands executed through SSH transparent to a remote host's administrator?

Can administrators know what commands I execute non-interactively through SSH? For example: does echo hello get logged somewhere at remote if I run this? $ ssh me@remote "echo hello" Can remote ...
1
vote
2answers
188 views

Different configurations for ssh client depending on ip address or hostname

I have this in my ~/.ssh/config directory: Host 12.34.56.78 IdentityFile ~/.ssh/my_identity_file When I ssh to 12.34.56.78, everything works fine. I'm asked for the passphrase for "...
2
votes
2answers
57 views

Address of host you connect from

When you connect to some remote machine using ssh, is there an easy way to address of the machine you connecting from ? (with some env variable, or hostname for instance) Main use how that would be ...
0
votes
1answer
225 views

Gnu Screen and vi - visualization issues

The scenario is as follows: gnu screen launched onto a scientific Linux distro ssh to an aix machine tried to edit a file with vi And this is what I got: "ex: 0602-108 screen is not a ...
1
vote
1answer
73 views

Bad known_hosts file when connecting to loadbalanced domain

FOO.COM has two A records. 1.1.1.1 and 2.2.2.2. If I connect to ssh root@FOO.com then it sometimes can connect, sometimes it writes that there is a key mismatch, update known_hosts file. So I know ...
3
votes
1answer
109 views

What are all of the SSH Key files?

There are six key files in /etc/ssh directory for private and public keys. 4 of them are for DSA and RSA public & private keys. but there are two more files named ssh_host_key and ssh_host_key.pub,...
0
votes
1answer
7k views

Trying to open a GUI from a remote server using Mac but not succesfully

I'm brand new user in MacOSX. I'm using ssh to connect to some Linux servers. I'm trying to open a GUI locally for a process running in the remote Linux server. So I read that I should install ...
0
votes
2answers
51 views

Determine users of nearby machine from CLI

Ok, so at my house I have three computers, and I frequently enjoy using ssh and scp to run commands that allow me to do wonderful things. Primarily transferring downloaded files, and running media ...
3
votes
3answers
17k views

change shell in Solaris/SunOS for your user only wihtout access to /etc/passwd

How do I set the shell in Solaris/SunOS for my user only, without access to /etc/passwd or any other su stuff? It should thereafter work both for interactive ssh (1) and ssh when you send commands (2)...
1
vote
2answers
3k views

PHP exec command has the result 0 even if an error occurs

I have this PHP code: $execout=exec('ssh root@xxx.xxx.xxx.xx "sudo /etc/init.d/smokeping reload"',$output1,$result); if($result !=0){ echo"that can't reload"; } else{ echo "successfully ...
0
votes
0answers
42 views

SSH Login with key but without password with regular user on Synology Diskstation [duplicate]

For backup purposes I wan't to login to my Synology DS212j+ without using a password (but with a passwordless RSA key) and with a regular user (let's say the username is 'regularuser'). I've gotten ...
23
votes
4answers
14k views

Why does `cd` command not work via SSH?

I was trying to backup some files via SSH but instead of tar'ing the ones I wanted I got my home folder. I did some further testing and it boils down to this: ssh root@server /bin/sh -c "cd /boot &...
4
votes
3answers
8k views

How can I scp a file that my user can't read but I can sudo?

Can I use scp to copy a file from a remote server which my login user can't read, but where I have permission to sudo to root (without password even)? How?
0
votes
1answer
4k views

Remote desktop (KDE) over SSH reverse tunnel

I have a reverse ssh tunnel through a middleman server set up and working. I'm running Kubuntu 12.04 here and on the remote machine. I want to open a remote desktop session. Until now I've been ...
4
votes
3answers
9k views

How to run sudo commands remotely via ssh -t?

I have a script that logs into a remote host via ssh -t and uses sudo service foo restart. The requirement is to avoid the prompt for a password on the remote host. The remote host authenticates via ...
2
votes
3answers
667 views

denyhosts is blocking existing users from logging in from unknown (new) IP addresses

I have denyhosts set up and working on Ubuntu 12.04. It apparently works well, except it is too strict. I can log in from any IP address that I have added to hosts.allow in advance. My sshd_config ...
7
votes
1answer
11k views

start autossh reverse tunnel automatically when network comes up

I connect from my home PC thru an Internet server I own to a restricted client (that I also own) using a reverse ssh tunnel. I have a script that sets up the restricted client to middleman leg of ...
0
votes
2answers
61 views

Emacs ssh connection abbreviations [closed]

When connecting to a remote server via ssh in bash I use abbreviations in ~/.ssh/config file: Host aaa HostName aaa.ssh.myhost.com User user1 So I can connect to aaa.ssh.myhost.com, typing: ssh ...
1
vote
2answers
8k views

ssh to multiple hosts and run a command [duplicate]

How do I ssh into multiple hosts (e.g host1, host2, host3, etc) and cat /etc/fstab to generate report.txt?
1
vote
0answers
255 views

Reverse ssh-agent forwarding and unlocking remote keys with your local keys

So the following two things should both be possible to do with ssh the question is just how difficult they would be and I'm hoping someone can give me an easy answer. 1) Suppose I have several ...
-1
votes
4answers
9k views

What is the equivalent of telnet localhost 25 with ssh?

What is the equivalent of telnet localhost 25 using SSH ? Clarification : I would like to have an SMTP connection with a server using SSH, just like it can be done with a command like telnet ...
2
votes
1answer
271 views

SSH Authentication Mechanism

Doing a personal research project and I'm wondering: Why does SSH do its own mechanism negotiation rather than use SASL? At first I thought it might be to ensure confidentiality of the whole session, ...
3
votes
2answers
1k views

Application deployment over ssh

My job requires frequently updating versions of Centos-compiled software on customers PCs over multiple ssh hops. Recently this got to the point of unmanageable by hand. What software can be utilized ...
3
votes
2answers
370 views

Is there a way to configure vim to run external commands through cpanel jailshell?

I'm editing files in vim over ssh, and I'd like to save git commits and things by running external commands in vim, like :!git add % && git commit -m "update" but because my server (hostgator) ...
0
votes
1answer
170 views

Making a Icecast Playlist from the Console

I got HP 6G RAM laptop that use as a home server, and a netbook that i use as my everyday console. I recently installed icecast server on the server as playing audio files on the netbook halts my ...
1
vote
2answers
595 views

Always look up non-FQDN domains as .example.com?

When I connect to the company OpenVPN they don't push their DNS to my computer, which means I have to type the FQDN for the hosts I e.g. SSH and HTTP to. Question Is it possible to configure my ...
3
votes
3answers
5k views

Why do 'ssh host echo $PATH' and printing the $PATH after ssh'ing into the machine give different results?

On a particular host, when I ssh into the machine and enter echo $PATH I get /home/wxy/bin64:/home/wxy/bin:/usr/kerberos/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/bin:/usr/bin and if I ...
0
votes
2answers
8k views

SSH tunneling: connect_to localhost port 22: failed

I want to connect from my computer to a remote computer using a middle server(u port forwarding). I run this command on remote computer: ssh -R 9300:localhost:22 user@middleserver and this one on ...
0
votes
1answer
136 views

How to control desktop applications over SSH

Assuming that the wife is right now using our desktop Kubuntu machine, probably surfing the web in Firefox or using Digikam. After logging into the machine via SSH, what can I do to 'pop up' little ...
3
votes
2answers
15k views

can't ssh into remote host with root, password incorrect

I have a remote host, previously I can ssh into it with root and password ssh root@remote_host or I ssh into it first using a regular user account ssh esolve@remote_host and then su root and ...
10
votes
4answers
2k views

How do I trigger autocomplete without a tab key?

I'm ssh-ing to my machine using my iPhone with an app called ServerAuditior. It doesn't have tab key. See screenshot. How do I trigger autocomplete without the tab key? I don't want to type a lot of ...
0
votes
1answer
3k views

Nohup process not running into ssh

I have a question on the use of nohup in an ssh session. During more than three years my java software executed the following command daily using a remote ssh session: cd some_path; chmod 777 script....
1
vote
2answers
3k views

Shell hangs when doing command from ssh

I'm trying to automate a server update process. What this should do is check for git diff files and list them, to later be copied from one place to the other. Here's my script on my local machine: ...
6
votes
1answer
3k views

My reverse-ssh tunnel is using keepalives but they're not helping

I have an ssh client machine picard behind multiple unreliable internet connections - all with NAT. I have my server time, reliable with a static IP. I want to be able to access picard thorugh time. ...
3
votes
1answer
4k views

Ssh to a box, run a command, output data to a file, then move on to the next IP adress [duplicate]

I want to run a script from my Jump server, have it SSH to a server, then run a command (like rm <file>, top or ls -lsa) then take that output and put it in to a file on my Jump server then move ...
7
votes
1answer
774 views

Why ssh does not turn terminal title back?

As you might know, when you ssh to a server from an X terminal (rxvt, gnome-terminal...), ssh changes the window title to reflect user@host, but it does not change it back. There are many tips how to ...
2
votes
1answer
346 views

How to prevent ssh-agent from starting in CentOS?

How do I stop ssh-agent from starting when logging into CentOS via openssh? There are no references to ssh-agent in my bash startup scripts (.bashrc) or /etc/bashrc.
4
votes
1answer
2k views

Why wget does not work via ssh tunnel? What does proxy prevent ssh-client to do?

To test things I'm trying to establish a local ssh tunnel from my laptop to a site via ssh-server, and download a page of the site (or view it in a browser). The tunnel is made like this: $ ssh -L ...
6
votes
1answer
7k views

apt-get via ssh-tunnel if only port 22 is allowed

I have a server which has only access to the outer world via port 22 (for the use of ssh from the server to other computers). I want to install some packages via apt-get on this server. Can I achive ...
17
votes
2answers
4k views

Can I unfreeze bash or vim when SSH session freezes from timeout? [duplicate]

When my SSH session times out, the whole terminal freezes. Is there any way to break out of that connection? CTRL+C doesn't cut it.
2
votes
2answers
824 views

Getting internet to Linux VM without being detected by Network

I'm trying to get internet to a Linux VM (Backtrack 5 on VMWare Workstation). Unfortunately I was told to not "bridge" the connection from the VM because it could be detected by our companies network ...