SSH (Secure SHell) is a protocol for running commands on a remote computer.
6
votes
4answers
4k views
Is there ever a reason to use scp instead of rsync?
Is there a reason to use scp instead of rsync? I can see no reason for using scp ever again, rsync does everything that scp does, with more safety (can preserve symlinks etc).
6
votes
7answers
4k views
How do I work with GUI tools over a remote server?
I have an Ubuntu server running on EC2 (which I didn't install myself, just picked up an AMI). So far I'm using putty to work with it, but I am wondering how to work on it with GUI tools (I'm not ...
6
votes
2answers
441 views
Is it possible to use one SSH key per account for each account on a given remote server?
Suppose I have a number of accounts on a server called SERVER. Let's call them ACCOUNT1, ACCOUNT2 and ACCOUNT3.
Suppose I don't want to have to type in the password for the account each time I ssh ...
6
votes
2answers
3k views
How can I set up SSH on Linux to log in password-less?
My Raspberry Pi is running the default Debian image and has SSH enabled. I log into my Pi as follows:
ssh pi@<IP-address-of-my-Pi>
I have to enter my password every time. Can I somehow make ...
6
votes
1answer
335 views
Why does SSH not consult /etc/hosts?
I'm administrating a networked environment where the users authenticate over NIS.
All machines can be used to SSH into the server but one.
On the machine in question, I get the message
ssh: connect ...
6
votes
3answers
3k 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 ' ...
6
votes
2answers
601 views
How do I background an SSH session? [duplicate]
Possible Duplicate:
How can I break away from an SSH session that has crashed?
I have started an SSH session on the command line, but now I want to get back to my local command line. For ...
6
votes
3answers
984 views
Are there disadvantages in SSH tunneling?
I recently "bought" a VPS that I want to use as a Proxy to be able to use some sites and stuff that I can't reach from germany.
Since I was yet too lazy to set up Squid and OpenVPN (which I ...
6
votes
5answers
4k views
sh startup files over ssh
I have some important commands I need to execute before any sh shell starts. This is required for passing SSH commands in the SSH command (ssh host somecommand) and other programs that run commands.
...
6
votes
3answers
328 views
Send an email any time an SSH key is used
I have about 30 nearly-identical CentOS 6 servers that I need to be able to push out updated config files automatically using an rsa key to log in as root. Usually this will just be rsync, but ...
6
votes
5answers
3k views
Copy input to clipboard over SSH?
Here's my usage case:
I'm often connected to other computers over SSH for work and I often need to copy and paste documents/text from the server to locally running editors for writing examples and ...
6
votes
3answers
2k views
how to ssh to remote server and use local emacs to edit files?
Is there a way to use the emacs installed my local computer to access remote files I have in a remote server? I have googled and found out that I should use TrampMode however it is necessary for me to ...
6
votes
1answer
791 views
How to restrict an SSH user to only allow SSH-tunneling?
How can I restrict a user on the ssh server to allow them only the priviledges for SSH TUNNELING? i.e. So they cannot run commands even if they log in via ssh.
My Linux servers are Ubuntu 11.04 and ...
6
votes
3answers
1k views
What is a better way to deal with server disconnects of sshfs mounts?
I have several directories mounted through sshfs. I sometimes get disconnects from the server (not configurable by me). I usually mount the directories like this
sshfs ...
6
votes
4answers
734 views
Why do I need to hit enter to get my shell prompt after my init.d script completes?
I had to write my own CentOS init.d script for celery because it only ships with one for Debian. You can see the script I wrote when I answered my own stack overflow question 3989656.
But there's a ...
6
votes
1answer
517 views
What steps does the system go through when handling an SSH connection?
What steps does the system go through when handling an SSH connection?
We try to log in via ssh
sshd starts pam and pam module to authenticate us
Depending on pam configuration, we need to provide ...
6
votes
4answers
406 views
Disable colours on terminal and SSH
My local Linux machine has coloured terminal output like this;
When I SSH to a pfSense/BSD box it changes the colours like this;
Even when I SSH from to a machine that doesn't have a coloured ...
6
votes
2answers
437 views
Why Bash unable to find command even if $PATH is specified properly?
I am specifying path to my command in the file /etc/profile:
export PATH=$PATH:/usr/app/cpn/bin
My command is located in:
$ which ydisplay
/usr/app/cpn/bin/ydisplay
So, when I performing "echo ...
6
votes
2answers
1k views
How to efficiently use 3D via a remote connection?
I have one weak PC (client) but with acceptable 3D performance, and one strong PC (server) which should be capable of running an application using OpenGL twice, i.e. once locally and once remotely for ...
6
votes
2answers
435 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 ...
6
votes
1answer
129 views
Managing and applying custom updates to multiple identical machines
I work at a library where we have just recently setup 5 kiosk's based on linuxmint.
The hardware is identical. I actually used DD to make an image after I set the first one up.
My Problem is, I now ...
6
votes
4answers
693 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 ...
6
votes
1answer
178 views
How can I limit ssh *remote* port forwarding?
I need to limit which ports can be remotely 'ssh -R' forwarded by an user.
I know about permitopen option on authorized_keys, but as it says on man page it only limits local 'ssh -L' port forwarding
...
6
votes
2answers
949 views
Get ssh to forward signals
I want to be able to send signals (SIGINT is the most important) through ssh.
This command:
ssh server "sleep 1000;echo f" > foo
will start sleep on server and after 1000 seconds it will put ...
6
votes
1answer
1k views
Nested ssh session inside screen has no color
I am attempting to keep a nested ssh session inside of a byobu/screen window, which I also connect to over SSH with Putty on Windows.
However the nested SSH session has no color. Here's what I'm ...
6
votes
2answers
105 views
ssh-agent: don't forward authentication for the whole keyring
I have two private ssh keys :
one to access my personnal machines,
one to access servers at my job.
I add those two keys to my ssh-agent with ssh-add.
Now, when I do ssh -A root@jobsrv I ...
6
votes
3answers
463 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 ...
6
votes
2answers
936 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 ...
5
votes
6answers
4k views
exit out of all SSH connections in one command and close PuTTY
Is there a way to back out of all SSH connections and close PuTTY in "one shot"? I work in Windows 7 and use PuTTY to SSH to various Linux hosts.
An example of the way I find myself working:
SSH to ...
5
votes
5answers
10k views
Uploading directories with sftp?
I'm having some trouble uploading directories(which contain other directories a few levels deep) by sftp. I realize I could work around this by gzipping, but I don't see why that's necessary.
Anyway, ...
5
votes
5answers
329 views
I messed up my zshrc on a remote server and now I can't run any commands!
On a remote machine I changed my zsh settings and it is now broken,
for every keypress it says: "url-quote-magic:1: url-quote-magic: function definition file not found "
I don't have another ...
5
votes
3answers
2k views
how to avoid ssh asking permission?
We are attempting to speed up the installation of oracle nodes for RAC installation.
this requires that we get ssh installed and configured so that it doesn't prompt for a password.
The problem is:
...
5
votes
2answers
1k 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
...
5
votes
3answers
6k views
How to write a bash script, that logs onto an other machine to do stuff?
Is it possible to write a bash script, that
would be started from machine A, logs in on a different machine B by ssh (both machines A and B would be Linux-Machines),
copys some files on to machine B
...
5
votes
3answers
2k views
How to check if I can log in to server via ssh?
I have a list of servers:
cat list.txt
10.10.10.10 servera
10.11.10.10 serverb
How can I check that I can log in via ssh to them or not? I mean by default I should be able to log in via ssh key ...
5
votes
3answers
4k views
How can I tell what version of linux I'm using?
Often times I will ssh into a new client's box to make changes to their website configuration without knowing much about the server configuration. I have seen a few ways to get information about the ...
5
votes
4answers
568 views
Automatically run commands over SSH on many servers
There is a list of IP addresses in a .txt file, ex.:
1.1.1.1
2.2.2.2
3.3.3.3
Behind every IP address there is a server, and on every server there is an sshd running on port 22. Not every server is ...
5
votes
2answers
1k views
Creating a UNIX account which only executes one command
Is there a way to create a user account in Solaris which allows the users to run one command only? No login shell or anything else. I could possibly do it with /usr/bin/false in /etc/passwd and just ...
5
votes
2answers
263 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 ...
5
votes
2answers
997 views
How to properly run “top” command through SSH?
I have to run top command on one computer being on another.
My targeted PC has IP 192.168.0.81
I was trying to do it: ssh 192.168.0.81 top
But I got this result: top: tcgetattr() failed: Invalid ...
5
votes
1answer
206 views
Running programs over ssh
I am planning to log in to my college PC using ssh and run some simulations. These simulations take very long time, so I would like the relevant process to run longer than the ssh session (I want to ...
5
votes
2answers
493 views
Is there any disadvantage in using SSHFS instead of SSH alone?
I find it easier to use SSHFS to mount a remote file system on my local computer instead of plainly SSH'ing into the remote computer. This saves me from using all the complicated scp commmands for ...
5
votes
2answers
161 views
Provide user name when using vim with scp
I was reading about SSH here http://blogs.perl.org/users/smylers/2011/08/ssh-productivity-tips.html and found that you can use vim to directly modify a file on a remote server that you can ssh into. ...
5
votes
2answers
396 views
Should I be backing up my SSH host keys?
In my automated backups, I'm not sure if I should be doing this. If the hard drive fails or if I wipe the hard disk and start over, what will be the effect of starting with a new SSH host key to my ...
5
votes
2answers
191 views
Special character '#' in Perl SSH command
I try to send command using SSH in my perl script with # but it gets truncated right at #
Example:
Input text is :
$message = "Product ID # STK000134"
The SSH command is :
$execute=`ssh -q ...
5
votes
3answers
258 views
Remote shell script Enter passphrase for
How can I run a script to log into a remote server and execute a remote ssh command without entering in my passphrase?
For example:
When I log onto a remote server and execute the git pull command I ...
5
votes
3answers
3k views
How to copy with SCP between two servers using key auth?
I can log in via SSH using key authentication to SERVER1 and SERVER2. However, I can't copy files between the two servers. Why? How can I copy between them? (the data that I have to copy is bigger ...
5
votes
3answers
4k views
Can I connect to Windows machine from Linux shell?
I can connect to Linux machines from Windows using PuTTY/SSH. I want to do the other way round - connect to a Windows machine from Linux.
Is this possible?
5
votes
6answers
5k views
How to run commands in batch mode over ssh?
How can I run commands in batch mode over ssh? That is, what is the ssh command's equivalent of sftp -b <filename> <hostname>?
I have a set of commands which I wish to run across a set of ...
5
votes
1answer
1k views
What happens when your password expires and you're using key authentication?
on one of the boxes I don't control at work I use ssh keys to log in. Our passwords are set to expire after a few months. What happens if I don't reset my password and it expires? will I still be able ...
