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

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Can not execute command with root in a remote Linux host

I try to migrate shell code to Python fabric code. The issue I meets is that Python can not execute command with root in a remote Linux host. Could anyone meet this issue and figure it out? I am very ...
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0answers
123 views

SSH: Permission denied, please try again

I need to connect to a server and don't know whats going on: me@pc:~$ ssh -v server OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /home/me/.ssh/config debug1: ...
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3answers
2k views

parallel-ssh with Passphrase Protected SSH Key

I'd like to use my passphrase protected SSH key when performing tasks with parallel-ssh (and related tools). However, I can't get this to work. All the documentation, regarding parallel-ssh, show ...
2
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1answer
57 views

Jumping ssh hosts without netcat

I have access to an intermediate server to which I can connect with ssh. From there I can connect to other servers: A→B→C, where A is my laptop, B is an intermediate server accepting connections from ...
2
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1answer
147 views

Avoid “Shared connection to <host> closed” messages

I'm managing a lot of drupal sites, and trying to automate some stuff using drush. Drush run locally calls drush on the remote host via ssh using options specified in the config for the site alias. ...
2
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2answers
3k views

slow ssh login to a remote machine

I am experiencing slow ssh login from a machine to a remote machine. The verbose of ssh is shown below in two broken blocks. ssh freezes for 15 seconds in the below shown block. [root@zabbix ~]# ssh ...
27
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4answers
2k views

How do I remotely edit files via ssh?

I have to edit some files placed on some server I could reach via ssh. I would prefer to edit these files in customized vim on my workstation (I have not rights to change vim settings on remote ...
0
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1answer
31 views

oddjob_mkhomedir doesn't run when logging in via SSH with Kerberos

I currently have a server which has Kerberos/SSSD/Samba to authenticate to Windows 2012 AD. In /etc/pam.d/system-auth oddjob_mkhomedir is set as below: session optional ...
2
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1answer
56 views

ssh-copy-id: why is the end of my public key different on my local vs remote?

Usually in the past I've always manually copied over my SSH public key to the remotes where necessary. I'm on a Mac and I finally decided to start using ssh-copy-id to make my life simpler, so I just ...
1
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1answer
43 views

Restrict ssh access per user based on conditions

Is there a way to restrict a user to only use ssh to connect via SFTP, but disallow that same user to login to a secure shell terminal? I only want the user to have the ability to connect by an SFTP ...
0
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2answers
36 views

Execute script after outbound ssh

I want to execute a script after outbound ssh. I have two server (A) and (B), and computer (C) (C) can connect to (A) by SSH but can't connect to (B) and (A) can connect to (B) by SSH But (C) can ...
3
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1answer
119 views

Deny SSH for a particular user from external network

So I have a server on my local network running an OpenSSH server. The server is configured to allow SSH from external networks, which is intended. However, I want to create one specific user ...
0
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1answer
85 views

Saving from arecord on a raspberry pi across a network to a mac

I've currently got a usb mic plugged into a Raspberry Pi B+ and am using the following code to record data: arecord --buffer-time=5000000 -D plughw:1,0 -f cd -t raw | lame -r - stream.mp3 I then ...
9
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3answers
3k views

Run a diff between local and remote files

I'm connected on a host via ssh and I'd like to compare (let's say with diff) a certain config file against its counterpart on an another host, also accessible via ssh, without having to manually ...
0
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2answers
4k views

SSH connection refused

I have a CentOS Linux server with a SSH connection. It works perfectly but from time to time, the server refuses the connection. If I reboot the server, I can SSH again. What could be wrong?
1
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1answer
69 views

Simple Radius authentication

I'm looking into using Radius as an authentication server for a few Ubuntu servers when accessing through SSH. I have tried using libpam-radius-auth but it doesn't work quite as I need. My goal is to ...
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0answers
33 views

Backup server with tar, encrypt and directly transfer the result, AFTER BUFFERING IT

So I've been investigative how to make full backups with tar, and I found that tar is a good tool if the backup is to be made once, and if the server has enough disk space to handle the output file. ...
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3answers
12k views

User denied ssh access while in AllowUsers list

I've inherited the administration of a linux box in my workplace; it was set up by a colleague who is now gone. Recently, I added a new user to the system, and tried to give her ssh access as well; ...
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0answers
27 views

Accessing forwarded port via SSL/TLS

I have a Raspberry Pi that sets up an SSH tunnel with my VPS so that I can access several things remotely. My Pi forwards its local port 80 to my VPS's port 3180, so I can access it via ...
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3answers
3k views

How to extract archive via network

I have two Solaris servers. On server1 I have a file, archive.tar.gz. I need to extract it using ssh to server2. So, I write the commands: ssh server2 < archive.tar.gz | gunzip -c | tar -xf - -C ...
0
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1answer
48 views

SSH key works on NIS server, fails on NIS client

I am trying to set up public key access to a couple of machines that I have a user account on. What I did: I used ssh-keygen to generate a key pair (without a passphrase) on my personal computer ...
0
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1answer
30 views

Syntax Error while running command from another hosts [duplicate]

I run a command to fetch server uptime as below [root@localhosts ~]# printf "`uname -n` `uptime| awk -F " " {'print $3,$4'}`\n" localhosts 75 days, Now when I run same command from another ...
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1answer
62 views

Running remote GUI application over SSH as a standard non-admin user [duplicate]

I'm running a HelpDesk for internal call center employees. All employees have headsets in conjunction with their jobs, and I'm working on a script to remotely launch a minimized Mumble session via ...
3
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2answers
15k views

How to restrict ssh users to browse only /home/%u contents

Can I confine my users to their /home/%u directory using only OpenSSH configuration? From instructions I found on the Internet, I stopped the SSH server and appended the following to the sshd_config ...
1
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2answers
38 views

Does `ssh -D` proxy DNS request?

Is DNS resolution tunneled to the other end when I use a SOCKS proxy created with ssh -D? I have read the manual, searched the Internet, and found no documentation relevant.
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2answers
83 views

How can I alert on completion of a long task over ssh?

My desktop is Ubuntu, which has the handy program notify-send, which pops up an alert on the desktop. It also has the following handy alias built in: $ type alert alert is aliased to `notify-send ...
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4answers
1k views

How can I keep my SSH sessions from freezing?

I have ServerAliveInterval and in case of few machines also ClientAliveInterval set to 540 in SSH client/server configuration files (I suppose setting it to more than that would not be a good idea). I ...
3
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1answer
365 views

Can emacs use gpg-agent in a terminal at all?

I understand that there are problems with getting pinentry-curses to work with emacs (see some of the comments on http://emacswiki.org/emacs/EasyPG), and so using emacs in a terminal isn't compatible ...
3
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1answer
9k views

installing fail2ban on CentOS 7

I am using @GarethTheRed 's answer to this question to install fail2ban on a remote CentOS 7 server. I am able to complete all the steps up until tail -f /var/log/fail2ban.log, at which point I get ...
3
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4answers
5k 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 ...
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0answers
26 views

Change external ip to be the one of a server?

I can ssh from my computer (Ubuntu 14.04) to a RedHat server. I wonder if I can browse webpages in Google Chrome or Firefox using the external IP address of the server? Running firefox on the server ...
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3answers
3k views

Why does SSH show protocol as tcp6 *and* tcp in netstat?

$ netstat -nat Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:80 ...
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0answers
55 views

SSH Public key fails when using Reverse SSH Shell

I have a machine behind a NAT, which I would like to access via ssh. Lets call this machine A. I have machine B, which is publicly reachable, which I would like to route my ssh connections. I have ...
3
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3answers
91 views

How to remotely connect to a computer via ssh which is behind a wireless router? [closed]

At present, I'm using the wireless router TP-Link WR740N. I have tried the following two solutions in order to connect to my host computer, which is behind the wireless router: Use the "virtual ...
1
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1answer
123 views

Is there a canonical method to restrict ssh access to certain IP addresses in Unix?

I checked man pages related to ssh on OS X and other systems and tried using hosts.allow and hosts.deny files as per this post, and sshd_config to no avail. $ cat /etc/hosts.allow sshd: ...
1
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1answer
156 views

Why SSH login works in shell but fails in all third parties via ssh tunnel?

I'm using ssh to log in (prompt password first time) on a remote server. In shell, using this command: ssh root@myserver.com works well! But all other db software applications that I tested ...
11
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9answers
28k 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 ...
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0answers
51 views

Backing up VPS via SSH/SFTP

I'm going to perform some maintenance on my VPS (Ubuntu Server 15.04), and I would like to back up some files before doing so. The problem is that some of these files are under other users' home ...
9
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2answers
11k views

Unable to use -o allow_other with sshfs (option enabled in fuse.conf)

I have the following on my /etc/fuse.conf file: # Set the maximum number of FUSE mounts allowed to non-root users. # The default is 1000. ...
0
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1answer
323 views

“Invalid MIT-MAGIC-COOKIE-1 key” when trying to run program remotely

I am attempting to run an application (ParaView) in client-server mode with its graphics rendering being done on the remote (server) end. I am using SSH as my means of connecting to the server, but do ...
28
votes
4answers
56k views

Open a window on a remote X display (why “Cannot open display”)?

Once upon a time, DISPLAY=:0.0 totem /path/to/movie.avi after ssh 'ing into my desktop from my laptop would cause totem to play movie.avi on my desktop. Now it gives the error: No protocol ...
0
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2answers
54 views

How to make the script automated to take password on its own?

I have a script that is doing sftp some files from one server to another, like inside the script script.ksh I have the below lines; sftp user@ip_address << EOF cd path put file1 bye EOF When ...
59
votes
4answers
55k views

What do the options `ServerAliveInterval` and `ClientAliveInterval` in sshd_config do, precisely?

I found this question, but I'm sorry I don't quite understand the settings on the two variables ServerAliveInterval and ClientAliveInterval mentioned in the accepted response. If my local server is ...
2
votes
1answer
34 views

ssh port forwarding without logging in

I am forwarding a port of a remote server to my local mac as follows: ssh -L 15672:localhost:15672 me@example.com When I do this in a shell, I am also logged into example.com. Yet I would like the ...
2
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3answers
126 views

How to limit the number of active logins per user?

How can I limit the number of active logins per user? I've seen this on various servers before, and I was wondering how I could set this up myself. Perhaps in those cases, this was accomplished by ...
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6answers
3k 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 ...
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3answers
123 views

How to use SSH to move a file from Ubuntu to Windows?

I am logged onto a windows machine. I am using Putty to login to an Ubuntu machine on the same network. Now I'm trying to move a .c file from the Ubuntu machine, to the Windows machine, edit it there, ...
8
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3answers
691 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 ...
2
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1answer
2k views

How to change ssh log location from /var/log/secure to custom location in rhel 6?

By default in RHEL 6, SSH server logs are sent to /var/log/secure. I want to change this location to a custom one. Is it possible to do that? I have tried modifying the rsyslog.conf file, but it does ...
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0answers
39 views

Very slow SSH connection unrelated to GSSAPIAuthentication option

I am having trouble connecting to remote machine through SSH machine (I cannot change SSH configuration on that machine though I can login without any delay from other machines). I have commented out ...