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

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16
votes
4answers
6k views

Can I pipe /dev/video over ssh

I have two computers, a desktop in my office ( with a webcam attached ) and a laptop somewhere else on the network. Usually I take a look at my office through my webcam by running ssh Office -Y ...
11
votes
4answers
5k views

Given keys in ~/.ssh/authorized_keys format, can you determine key strength easily?

~/.ssh/authorized_keys[2] contains the list of public keys. Unfortunately, each public key does not specify the key strength ( number of bits ). Is there a utility that can process this file line by ...
6
votes
4answers
4k views

How do I connect to a pc through another pc using ssh

I have three Computers. PC1 and PC2 is on a private LAN, where PC1 is known to PC2 as 192.168.0.2 PC2 and PC3 is on a another LAN, where PC2 is known to PC3 as 192.168.123.101 How can I connect to ...
6
votes
2answers
699 views

Is it possible to break long lines in sshd_config?

Specifically AllowUsers parameter: e.g. convert this AllowUsers user1 user2 user3 user4 to this AllowUsers user1 user2 user3 user4
31
votes
5answers
25k views

What does the Broken pipe message mean in an SSH session?

Sometimes my SSH session disconnects with a Write failed: Broken pipe message. What does it mean? And how can I keep my session open? I know about screen, but that's not the answer I'm looking for. I ...
2
votes
2answers
542 views

Script for ssh Agent Management: Is this adequate? Any bugs?

The following is something I use to manage my ssh agent settings. #!/bin/echo "Must source this:" ## Ensure that ~/.ssh/env contains valid values unset SSH_AGENT_PID SSH_ENV_REFRESH [ -r ...
9
votes
3answers
6k views

Differences between VNC and ssh -X

Why would you use VNC (or for that matter NX) instead of just using ssh -X (-Y). I read that VNC uses less bandwidth, but is there any other differences/advantages with respective tool?
5
votes
1answer
600 views

Why is vimdiff so slow?

Whenever I'm in vimdiff mode, my PuTTY session slows down considerably. This is especially noticeable when I try to scroll down many lines by keeping j pressed. Why is it so slow in comparison to ...
12
votes
4answers
2k views

OS X: how to keep the computer from sleeping during a ssh session

When I ssh into a OS X computer on my network the session lasts until the OS X goes into sleep mode. Is there a way to prevent this from happening during my SSH session, apart from physically bumping ...
7
votes
3answers
5k views

Redirect stdout over ssh

I would like to run something > file on a remote system through ssh, but if I run ssh host something > file the redirection is executed locally as ssh etc > file I've tried it with ' ...
5
votes
1answer
5k views

Remote for-loop over SSH

I have the following in a script for server in ${servers[@]}; do echo ${server} ssh user@${server} "for i in /tmp/foo* ; do echo ${i}; done" done But it doesn't work. Weird thing, I see $I amount ...
4
votes
1answer
967 views

Tunnel traffic through another machine over ssh

I want to be able to route a portion of my traffic through another machine over SSH. For example, is it possible to browse the web through the ssh tunnel and also browse the web through your LAN ...
7
votes
4answers
1k 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 ...
8
votes
3answers
10k 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
votes
3answers
13k views

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 ...
3
votes
1answer
309 views

Xterm is not completely erasing field lines

We are running Windows Clients with Cygwin XServer that has a bash script application running on AIX Unix. We have a login script using expect to ssh into the server and then xterm to create the ...
15
votes
5answers
6k views

How can I tell what version of OS X I'm on from the command line?

I frequently find myself SSHing into various OS X machines, and it'd be useful if I could tell what version of OS X I was on when I'm doing that. uname -a doesn't quite work, since Darwin kernel ...
3
votes
8answers
719 views

Write a remote managing script

I need to be able to locally run a script that will connect to various servers and run commands on them. What is the best way to accomplish this?
4
votes
5answers
1k views

How does ssh -X function?

When using ssh -X is the executable copied and run locally or is it run on the host machine. Since it is called X11 forwarding it makes me think that the window is drawn on my machine but running on ...
14
votes
2answers
6k views

How can I determine if someone's SSH key contains an empty passphrase?

Some of my Linux & FreeBSD systems have dozens of users. Staff will use these "ssh gateway" nodes to SSH into other internal servers. We're concerned that some of these people use an unencrypted ...
76
votes
6answers
34k views

Keep SSH Sessions running after disconnection

I sometimes have long running processes that I want to kick off before going home, so I create a SSH session to the server to start the process, but then I want to close my laptop and go home and ...
7
votes
4answers
5k 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 ...
5
votes
5answers
495 views

Sftp interface to Scp

I have a linux based router that doesn't have the SFTP server installed. More specifically, when I sftp user@ipaddress I get a sh: /user/libexec/sftp-server: not found error. My interest isn't trying ...
25
votes
5answers
23k views

scp without replacing existing files in the destination

How do I copy an entire directory into a directory of the same name without replacing the content in the destination directory? (instead, I would like to add to the contents of the destination folder) ...
11
votes
3answers
9k views

SCP from one server to another without password prompt

What is the best way of doing SCP from one box to the other without prompting for password? There are two servers: Server A (10.152.2.10): /home/oracle/export/files.txt Server B (10.152.2.11): ...
13
votes
6answers
5k views

How do I copy all files and directories except certain ones over ssh?

Using the Linux command line, I use the scp command to copy up all the files and folders from a certain directory. However, I don't like to consume wasted bandwidth for copying up things I rarely ...