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

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19
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2answers
8k views

How do I know if my ssh tunnel is created successfully?

I rely on the following script tunnel.sh written by others to keep a ssh tunnel alive: #!/bin/bash export SSH_HOST=tim@server if [ ! -f /tmp/.tunnel ] then echo "Creat SSH tunnel" ssh -f -D 9999 ...
3
votes
1answer
3k views

ssh tunnel on ssh tunnel between Windows and two Linux machines

I have the following configuration and want to establish a tunnel on a tunnel. I read already the following topic: How to put a tunnel in a tunnel? My configuration: Notebook --> Linux Server A ...
7
votes
2answers
430 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 ...
6
votes
3answers
1k views

Keep running a script via ssh

ssh can use to run remote commands. ssh me@server.com 'long-script.sh' I run a long script that will take a lot of time, but I want to close my computer and keep running the script in the remote ...
6
votes
4answers
5k views

What slows down my ssh login?

Everytime I ssh login to a server, it is always very slow. As a reply to my earlier post said, "grepping through a 200 line file should take millisecond or so, so I would doubt its that." I tried ssh ...
58
votes
7answers
21k views

Is it possible to run ssh-copy-id on port other than 22?

I have a server with SSH running on a non-standard port. Instead of 22, it runs on 8129. To log in, I use: ssh -p 8129 hostname Now, whenever I need to set up a key for password-less login, I have ...
5
votes
1answer
1k views

Is my default remote shell a trouble maker?

By finger tim on the server, I learned that my default shell is some script /usr/local/bin/bash-wrapper whose content is: #!/bin/bash USERNAME=`whoami` if ! grep ^$USERNAME$ /etc/domain-users > ...
15
votes
3answers
18k views

How do you copy the public key to a ssh-server?

Here is what I have tried, and I got an error: $ cat /home/tim/.ssh/id_rsa.pub | ssh tim@just.some.other.server 'cat >> .ssh/authorized_keys' Password: cat: >>: No such file or directory ...
9
votes
1answer
1k 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 ...
5
votes
5answers
12k views

sshfs always asking for password in fstab?

I'm trying to enter an sshfs mount in /etc/fstab with the following line: sshfs#oli@192.168.0.2:/media/usb0 /media/ExtHD fuse defaults,nonempty,allow_other 0 0 So that this volume is mounted at ...
3
votes
3answers
17k views

How can I get the address of my local machine?

I'm on a macbook running Lion. In Terminal I'm connected to my schools server with ssh. I navigated to a folder on the server and have a file I want to copy to my local machine, but I don't know what ...
1
vote
1answer
580 views

Mounting Remote Filesystem over SSH as a Different User

Due to a breach of security, the administrators of the work server have implemented a new method of security. To log into the server, we must log in as our own user (which has severely limited ...
2
votes
4answers
2k views

How to replicate (fork) the current terminal

Say I am using terminal and have sshed to a remote machine and did something. How do I create a new terminal tab (or window) so I still has everything from the previous terminal window without having ...
4
votes
2answers
645 views

Sharing private keys across machines

Say I have local access to two machines A and B and remote access to machine C. If I generate a public-private pair of keys for accessing machine C from A, can I share the private key with machine B ...
3
votes
1answer
600 views

ssh “-f” don't give back hand in bash when listening to stdout/stderr

Please look at these: ## Does NOT return to the shell, but Ctrl-C can exit ssh -S none -fNR 13018:localhost:22 example.com | cat ## Returns to the shell (no "-S none") ssh -fNR ...
4
votes
2answers
3k views

How to start plasma-desktop from SSH-console on desktop session?

I killed KDE's plasma-desktop on a openSUSE 11.2 machine, because it was eating too much CPU. How can I restart it via SSH or another tty session? On the affected computer there is only shown a ...
5
votes
1answer
376 views

SSH HTTP Tunnelling

I am trying to set up an SSH account on my server for someone, and I only want to give them access to tunneling internet traffic. I set their user's "shell" to /bin/true, so now when they SSH (and ...
6
votes
3answers
1k views

emacs syntax highlighting fails on my SSH client

I need to connect to a remote server by SSH to edit some documents. When I work at home, I SSH to the remote server using SSH Secure Shell and open emacs, but it doesn't fully highlight documents as I ...
2
votes
2answers
2k views

Web access through a remote proxy accessed over SSH

I'm browsing the web on a client PC running Windows or Linux. I want to browse a website (http://access.lan:52050//cgi-bin/login.cgi) which is not directly accessible from my PC. I can browse the ...
0
votes
2answers
327 views

Creating SSH Terminal Wrapper

I'm new to scripting, but somewhat familiar with Linux. I am actually using this on a Fedora16 build, with Gnome3 and gnome-terminal... fyi. I flip through all sorts of ssh terminals all day long ...
1
vote
1answer
754 views

What causes delay in my keystrokes on OSX's Terminal application?

I'm using the OSX application Terminal to work remotely on Amazon EC2 servers through SSH. Occasionally and seemingly randomly, my keystrokes are delayed. I've tried reconnecting, restarting ...
14
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2answers
2k views

Accidently created a file called -X, how can I delete it? [duplicate]

Possible Duplicate: How do I delete a file whose name begins with “-” (hyphen a.k.a. dash or minus)? Like an idiot, I ran this command: tar -cf -X awstats-icon icon ...
1
vote
1answer
986 views

Execute command through SSH

I am writing a script to check whether all the servers in my organization are functioning properly. One of those is Zimbra mail server. I am trying to send a mail through sendmail provided by zimbra ...
9
votes
2answers
724 views

Is an SSH connection faster if I lower the RSA key size?

I have a very slow connection, and I need to use SSH on it. How can I increase "the speed"? I mean is using big RSA keypairs a large overhead? Would lowering the key size increase the effective ...
2
votes
1answer
295 views

How to put a tunnel in a tunnel?

I know I can create an ssh tunnel and then tell a program (with tsocks) to use it for networking. But. How can I put an ssh tunnel in an ssh tunnel? I mean I can't again use the tsocks in tsocks ...
2
votes
2answers
2k views

Fedora 16 ssh over the internet/home network help. Same computer ok

I first posted this on serverfault, but this forum seem to be more appropriate. http://serverfault.com/questions/345471/fedora-16-ssh-over-the-internet-home-network-help-same-computer-ok I think I ...
0
votes
2answers
1k views

Cannot Connect Using SSH: UseDNS terminating

When I attempt to login via ssh like so ssh marc_mtpt0@m3pt0.com I get this response: /etc/ssh_config: line 51: Bad configuration option: UseDNS /etc/ssh_config: terminating, 1 bad configuration ...
8
votes
4answers
4k 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 ...
2
votes
1answer
577 views

UFW Limit does not appear to work

I have my ssh port changed to XXX. Then I did ufw limit XXX/tcp However, when I try to login, after 5/6 failed attempts I get thrown back to prompt, but I can try again. Is that supposed to be the ...
6
votes
4answers
3k views

SSH authentication: either SSH keys or one time password

I have an Ubuntu 10.04 Linux server that I normally ssh into (from my home machine) using ssh key authentication. However, sometimes I need to ssh remotely from potentially insecure machines (like ...
2
votes
1answer
925 views

.ssh/config way to spectify pseudo-tty allocation and command execution (like screen)

Is there any way to specify, in .ssh/config, a command like: ssh -t remote-host "screen -dR screen_name" so I can easily access the remote screen session with ssh remote-host? Right now I solved ...
9
votes
4answers
633 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 ...
49
votes
2answers
6k views

How does SSH connection survive a network restart?

From a Linux SSH shell, type /etc/init.d/network restart to restart the network service. I expect my SSH connection to die since the network service goes down. But it doesn't. Very cool. But how does ...
6
votes
2answers
2k views

Enabling system management privileges for non-local users - How the heck does `polkit` work, anyways?

I am managing a CentOS 6.2 server remotely using X over SSH (actually NX, but that's just a proxy). The Everything is working correctly, except when I try to do tasks that would normally require ...
1
vote
2answers
2k views

ssh + nohup does not work

I'm trying to run a program over SSH that keeps running when I disconnect. This Stack Overflow answer gave me the following command: nohup sleep 30 > foo.out 2> foo.err < /dev/null & ...
1
vote
2answers
2k views

Is there any way to get control over a terminal by ssh with no (screen) [duplicate]

Possible Duplicate: How can I disown it a running process and associate it to a new screen shell? Let's say I'm install applications directly on to a Linux box. May I go to another machine ...
3
votes
1answer
644 views

wait for autossh connection to complete

I'm trying to create a script that runs a few commands that take a long time to execute and require a constant connection, but autossh user@server wait $! #or wait ${!} commandA commandB doesn't ...
8
votes
2answers
14k views

How to configure SVN/SSH with SSH on non standard port?

I have configured SSH to be on port 20000. When I try: svn co svn+ssh://server.com:20000/home/svn/proj1 proj1 --username jm I get svn: To better debug SSH connection problems, remove the -q ...
1
vote
1answer
477 views

X11 Forwarding Problem Netscape

I have the following problem. A working verbose x11 forward request looks like this: remote server release: Red Hat Linux release 6.2 (Zoot) sh-4.1$ ssh -1 -vvv -l username -o "ForwardX11 yes" ...
6
votes
2answers
2k views

Giving some users only SSH and shell access with limited resource usage

I'm trying to make a user that can access my server through SSH and allow it to have a shell, limited to using only, say screen and irssi. And it shouldn't it be able to see other directories except ...
11
votes
2answers
18k 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?
0
votes
3answers
685 views

wrapper command for sshd_config?

Is there a command to set settings in sshd_config, instead of manually editing the file? I would prefer it to do this way, because it's easier to automate. Otherwise I'd have to grep config with my ...
14
votes
3answers
10k views

Encrypting file only with SSH -priv-key?

Suppose I want to encrypt a file so that only I can read it, by knowing my SSH private key password. I am sharing a repo where I want to encrypt or obfuscate sensitive information. By that, I mean ...
1
vote
1answer
486 views

SVN checkout under a different user name

When I ssh into my server I log in under root or my user on the system. However, when I checkout from my svn repos then are then owned by either root or my user, and therefore all files deployed to ...
6
votes
2answers
1k views

How to speed up X over fast connection ? (especially over ssh)

What are recommendations on speeding up X applications over local fast (gigabit) connections? (similar question for slow connections) Currently I'm running over ssh -Y, which is fine, but I wonder if ...
3
votes
2answers
3k views

How to limit number off ssh login attempts per time interval

I am trying to limit number of ssh login attempts per time period. How might I do that? I have something like (in shorewall's rules) #ACTION SOURCE DEST PROTO DEST ...
3
votes
3answers
436 views

Install pdflatex via SSH on Amazon EC2 instance

I need to install pdflatex on my Linux powered machine (Amazon EC2 instance, didn't decided yet which distribution would be the best so also feel free to give a hint) because I want to connect ...
9
votes
3answers
10k views

How can I track who SSH'es into my linux machine?

I'm running Ubuntu 10.04. Is there a way I can get a daily report of who has logged onto the box, what time, and even - this may be asking too much - a report of the commands they used? This is a ...
2
votes
5answers
2k views

full access to remote computer without remote static IP

How can I access to remote computer that the remote computer is in a local network? I worked with reverse ssh : http://www.vdomck.org/2005/11/reversing-ssh-connection.html I don't want just SSH but I ...
2
votes
1answer
876 views

Deny external SSH access to a user

Is it possible to deny access to a user (in my case www-data) from outside the network? Or possibly deny this: ssh www-data@example.com But allow this if already logged in: su www-data