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

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13
votes
6answers
17k views

ssh returns message “X11 forwarding request failed on channel 1”

When I ssh into a remote server that's not running any type of X11 desktop environment I get the following message. $ ssh user@server X11 forwarding request failed $ ssh user@server ls X11 ...
1
vote
1answer
1k 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 ...
0
votes
1answer
756 views

SSH to Linux Container from Other Machine

I am trying to learn about Linux Containers and this is my first encounter with servers, ssh and many other things that I do not know the terms yet. I create five different containers and authorized ...
0
votes
0answers
21 views

Impact of removing ssh_config file from Linux

Pretty new to Linux here. Trying to get a better grip on the OS.  Here is my problem - I have a question about the impact of removing ssh_config file from a Linux box. I was having some cipher ...
0
votes
0answers
23 views

Can't ssh into my server from another computer

I used to be able to ssh into my server from other computers. But I stupidly messed up my remote connection setup a couple weeks back (I don't remember what I did...) and now I can't ssh into my ...
1
vote
1answer
22 views

cannot get screen command to execute code containing DISPLAY=:0

I am trying to ssh into a remote machine and run a shell script, which opens a GUI. I want the GUI to open on the remote machine and remain open (so I am using DISPLAY=:0 nohup). I tried: ssh -t ...
0
votes
0answers
12 views

Need to fix user access on centos

I screwed up user permission for my account "yann" on a centos 7 server. I would like to have that user to access rw on all folder under /home to manage the webserver folders. Each top level folder ...
4
votes
2answers
543 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 ...
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 ...
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
1answer
38 views

ssh key_load_public: invalid format warning

SSHing into my system succeeds but even without the -v flag I get key_load_public: invalid format message. Below is the output w/ using the verbose flag. Specifically debug1: key_load_public: No ...
0
votes
2answers
43 views

linux_startscript.sh: 14: linux_startscript.sh: Syntax error: “(” unexpected

I'm trying to start a multiplayer server on my server. I´ve transferred the files to the server and tried to execute them with these commands: cd /home/user/RisingWorld/ sh linux_startscript.sh but ...
1
vote
0answers
52 views

Problem with ssh connection [closed]

I need to connect to my computer via ssh. I have to use VPN, because the remote machine is my computer at my workplace. I have no problems with using VPN. So, I installed open ssh server from the ...
3
votes
1answer
616 views

How do I push a Mercurial repository to BitBucket over ssh? [closed]

I created a public key for ssh and registered that key with BitBucket. I then attempted to push: $ hg push ssh://jhayward@bitbucket.org/johncharrell/[project name] pushing to ...
0
votes
3answers
30 views

nothing happens when I try to ssh [on hold]

When I try to ssh into my work server, the command just gets stuck. The command doesn't return anything. When I strace'd it, it seems like its stuck mid-execution. I know it is a problem with my ...
12
votes
2answers
24k views

Meaning of “Connection closed by xxx [preauth]” in sshd logs

We have a Windows batch script, which connects automatically to a linux server via PLINK (putty). There is NO public private key authentication, the user and the password are in the script. On our ...
0
votes
2answers
20 views

Can't start remote WildFly with ssh

When executing remote script with SSH: ssh user@192.168.0.10 -t sudo /etc/init.d/wildfly start WildFly not started. If I run ssh user@192.168.0.10 -t /home/user/my.sh my.sh: !#/bin/bash sudo ...
2
votes
3answers
1k views

Does /var/log/secure log successes?

Short one that I've been unable to find a decent answer for. Centos 5.10 server, trying to trawl through all the logs I can to see what IPs successfully accessed the server. I've been mucking about ...
-1
votes
0answers
50 views

Being Prompted for Password After Already Registered Public Key On server

NOTE: This is not a duplicate to the popular question. Why am I still getting a password prompt with ssh with public key authentication? I had an original post but I did not get much answers helping ...
3
votes
2answers
79 views

Is there a one liner which can list public key fingerprints with authorized_keys as input?

I'd like to audit the authorized_keys file on a number of servers and match them with known AWS key fingerprints. Is there a one-liner which incorporates ssh-keygen -lf which will output the ...
2
votes
1answer
36 views

How to track ssh connection time, disconnection time and idle time?

How can I track ssh sessions on my server including ssh connection time, disconnection time and idle time? Here's what I have for connections: cat /var/log/{auth.log,auth.log.1} | grep -i Accepted | ...
4
votes
4answers
10k views

What is pageant for Linux? Saving SSH private key passwords

I want the computer like pageant, to show a SSH password prompt during boot time. I have my private keys stored in a Dropbox between 3 computers of which 1 is now Ubuntu. I have googled for 2 hours ...
3
votes
2answers
35 views

Feedback when entering passwords, without revealing length

I often SSH into a machine and use sudo on it. When entering passwords, I'm always afraid that another window will steal the focus. However, I don't want to display asterisks (with pwfeedback, for ...
32
votes
6answers
3k views

Linux equivalent to PowerShell's “one-to-many” remoting

Coming from Windows administration, I want to dig deeper in Linux (Debian). One of my burning questions I could not answer searching the web (didn't find it) is: how can I achieve the so called ...
1
vote
2answers
44 views

Why does SCP fail when “RequestTTY force” option is enabled?

In my SSH config file, I have to enable the RequestTTY force for some important reasons. And currently my config file looks like this: Host x.x.x.x HostName yyyy StrictHostKeyChecking no ...
0
votes
1answer
45 views

Everytime I restart my Digital Ocean server, .ssh/authorized_keys changes

So I am facing a strange issue with my digital ocean server. Everytime I restart the server manually from the website my .authorizedkeys get reset. It always has a value ssh-rsa ...
22
votes
3answers
30k views

How to dd a remote disk using SSH on local machine and save to a local disk

How can I create a backup of a remote disk using SSH on my local machine and save it to a local disk? I've tried the following: ssh hostname@my.ip.address "sudo dd if=/dev/sdX " | \ dd ...
0
votes
0answers
52 views

Executing remote code with arguments

Why this: ssh -i ~/.ssh/master.pem ec2-user@xx.xx.xx.xx 'bash -s' < `dirname $0`/elements/"$element" returns hostname.sh test-5000: No such file or directory when $element is not a just a single ...
1
vote
4answers
61 views

Issue with ssh && apt-get, need advice

I decided to dust off my Beaglebone Black Rev.C and figured before I do much of anything, I should get everything up to date. I created an SD card with the new Debian 8.3 image and installed it. No ...
1
vote
1answer
2k views

Fail2ban with firewalld

I'm trying to configure fail2ban to block ssh from a local hosts. Fail2ban is install on CentOS 7 with firewall (Linux 3.10.0-229.4.2.el7.x86_64 x86_64 ). I have copied the jail.conf to jail.local i ...
0
votes
1answer
29 views

autossh over many LocalForward ports

I have to connect to a base server, call it server1, and the from there, I can access many other servers (host1, host2, ...host99.) I have the autossh working for server1 with no problems - it ...
2
votes
1answer
29 views

Ways to restrict remote user to only access a remote database

I want to be able to setup a remote user that can update a PostgreSQL database on a production server. I have two machines, one is a local server that I use as a command and control system, named ...
3
votes
2answers
3k views

Playing a remote movie on the remote computer

I have two computers (a desktop and a laptop) running linux connected to my local area network. I like to ssh from my laptop over to my desktop and run programs there, and sometimes listen to music on ...
2
votes
1answer
854 views

sudo -u git clone

I'm on Ubuntu server 14.04. I am using apache web server which runs as the www-data. I need to do git clone from a script (a web hook). This script will run with www-data user privilages. Running ...
6
votes
2answers
3k views

Force ssh to always use SSH_ASKPASS

I want to force ssh to always use the program specified by SSH_ASKPASS. In my case the program is just a bash script returning the passphrase. The problem is, as the ssh documentation says: If ...
3
votes
2answers
38 views

How to make ssh account capabele to only sshfs and rsync?

I'd like to make ssh account that is capable of doing two things: mounting (can be one) directory via sshfs performing backup&recovery of his/her desired directories using rsync I would love ...
1
vote
1answer
18 views

Can I use `internal-sftp` when using wrapper script with `ForceCommand` in sshd?

I use /etc/ssh/wrapper.sh script, like in tutorial, that filters which commands are allowed to be run via ssh and logs them. Currently when internal-sftp is required, I use /usr/lib/sftp-server. Is ...
2
votes
0answers
45 views

ssh X11 forwarding

I am trying to connect ssh from my laptop to my raspberri pi 3b locally. However when I try to connect by: ssh -v user@local-raspberri-IP it gets stuck at X11 forwarding. The output that I get is: ...
1
vote
2answers
36 views

SSH to a remote Machine using a different Local ID

I need help related to SSH. Let me explain a scenario. I am logged in as "user1". Host A: user1 user2 Host B: remoteuser. There is a trust relationship setup between user2 on Host A and ...
0
votes
3answers
64 views

I want to copy a remote txt file via SSH, but without using root access

I want to copy my hosts to remote /etc/hosts but it doesn't work. I know root SSH access makes things easier, but IMHO root SSH access is a little dangerous. cat /etc/hosts|ssh samba2 "sudo su -c ...
0
votes
0answers
28 views

Plink never return to command line [closed]

I'm trying to use plink to execute command from file. So I use it this way: plink -ssh user@host -pw pass -batch -m "path_to_script" But unfortunately plink never return to terminal. I also tried ...
3
votes
1answer
2k views

Chroot gone wrong, can't ssh with user

Distribution: Scientific Linux 6.5 (Carbon), not exactly your typical brand of linux. Tried to chroot a user using these instructions for SSH and quite obviously failed, and now I can't even log in ...
0
votes
1answer
29 views

rsync over ssh without typing the password each time [duplicate]

I got a bash script to synchronize data between two computers. It works fine but I have to type my password every time the rsync command is called. #!/bin/bash sourceIP="192.168.178.128" ...
61
votes
6answers
62k 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) ...
7
votes
2answers
3k views

Regexp in .ssh/config

At work, I often have to log into hosts which follow a common naming scheme, e.g. qc01 - qc12, hc01 - hc10, and so on. All of these need to get the same config values in my laptop's .ssh/config. Of ...
0
votes
1answer
37 views

unable to SSH to eth1 after bringing down eth0

I have a remote machine with 2 interfaces: eth0 and eth1. I am able to ssh using eth0 ip address as well as eth1 ip addr. However, things go strange once I bring down eth0 using the command ifdown ...
0
votes
1answer
31 views

Rental server refuses SSH connection; won't allow authorise me to download my SSH key

I am attempting to connect to my rental server via ssh to install MemSQL for a project. I have written the following in ~/.ssh/config: HOST eHosts HostName e9.ehosts.com Port 2222 User orderof3 But ...
0
votes
2answers
26 views

How to suppress debug2 messages during SSH session?

When I am logged into my home Linux machines via SSH, I get the following debug output a few times every minute: debug2: channel 0: request window-change confirm 0 When I am editing files in nano, ...
1
vote
0answers
24 views

Strange X11 forwarding issue [closed]

I have a strange issue regarding ssh x11 forwarding. Assume I have an host named node71. Firstly, I start Cygwin/X and mintty in Windows, now the local DISPLAY=0.0 Next, I can do ssh root@node71 -Y, ...
-1
votes
0answers
29 views

run commands via proxy in centos [closed]

i want run some commands in my centos but i need tunnel my commands to another ip. for example my server ip is: 111.111.111.111 and i have another server with this ip: 222.222.222.222 when i run ...