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

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Tracking my shell path in Emacs

Not a long time ago, I found the following precious snippet that allows Emacs to track my current directory on any ansi-term buffer. More specifically, if I cd <some/path> from within a ...
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2k views

git-upload-pack hangs indefinitely

I have the following call structure: Jenkins runs fab -Huser@host set_repository_commit_hash:123abc. set_repository_commit_hash runs git fetch with pty = False. The child process ssh git@github.com ...
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1k views

Can't figure out why ssh_exchange_identification: Connection closed by remote host appear

At home, I have setup a Raspberry Pi with the latest version of Raspbian and with ssh enabled. I also use a Mac Book Pro with OS X 10.9.3. I use ssh pi@192.168.0.22 to do some work on the Raspberry ...
3
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92 views

SSH always refuses first connection attempt

There's an AIX box where I work and so I've not got any root access to it. When I connect to it using telnet I can get on fine. When I connect to it using SSH if I put in my correct password on the ...
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68 views

Is there a technical reason why ssh-agent lacks a sudo-like inactivity/idle timeout feature?

There are some brief discussions about the existing ssh-agent -t feature at [1], and there was a post as far back as 2001 on debian-devel [2] wishing for an inactivity timeout feature. There's a ...
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73 views

Xmove is unable to connect to X11 server via SSH X forwarding

I have a LAN where a windows machine running Cygwin (XWin server) is used to connect to a Linux host via SSH with trusted X forwarding. I connect with $ ssh -Y user@linuxhost without any issues and ...
3
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58 views

Why is my SSH authentication socket different from the man pages?

These two entries of man ssh-agent describe the SSH authentication socket: $TMPDIR/ssh-XXXXXXXXXX/agent.<ppid> UNIX-domain sockets used to contain the connection to the authentication ...
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98 views

What default shell to use for an SSH user limited to a single command

When limiting a user to a single command via ssh, what default shell should be used for the user? This is a follow up to how can shellshock be exploited over SSH? I have a machine that is running an ...
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4k views

“PTY allocation request failed on channel 0 stdin: is not a tty” when SSH'ing into a Debian server

My hosting space (Debian Wheezy) serves two websites (one WordPress and one Rails). Today I saw both were down and I rebooted the server. The Rails site works again and the WordPress one now says that ...
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49 views

Operation timeout (in /var/log/secure)

Sometimes when connecting via ssh to my RHEL server, I get the following message back from the client: Operation Timeout Seems like a network problem, but when I look at /var/log/secure on the ...
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271 views

Server freezes because of fail2ban

Lately I've experienced some problems with my server freezing or having network problems (I can't really tell which at this point). I'm running OpenSSH on port 443 and it seems fail2ban's anti SSH ...
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679 views

.Xauthority file is empty

I have been trying to ssh -X to my cluster running OpenSUSE 11.2. It used to work well for me. But now I get this message: X11 connection rejected because of wrong authentication. Failed to open the ...
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369 views

Have tmux wait until I SSH in, to complete rest of Tmuxinator script

After recently discovering tmux and Tmuxinator, I've been trying to set up a development environment to use. Per protocol, we aren't allowed to store passwords/passphrases in scripts. So what I'm ...
3
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220 views

Can't get SSH working anymore on Debian after upgrade

I have a vServer and can only login via SSH. After the latest apt-get upgrade command, I can't login anymore and get the following error message: "Network error: Connection refused". It seems that ...
3
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435 views

SSH AuthorizedKeysCommand and SELinux

I'm trying to use the SSH AuthorizedKeysCommand in a CentOS 6.5 machine, but I'm encountering an SELinux error. When I switch SELinux to permissive mode - using setenforce 0 - it works, but when I ...
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5k views

fatal: bad ownership or modes for chroot directory component “/”

I used to be able to connect via ssh with the user I have created but now I keep getting: "Write Failed: Broken Pipe" and I can only connect as root In the ssh auth.log I get the following: ...
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130 views

Slow terminal print out

Just installed (netinstall) debian wheezy on a second machine newer machine however the terminal print out is noticeable slower than on the old machine although the new have faster CPU, RAM and HDD ...
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3k views

How do I force ssh to use a second interface with higher metric?

I have a Crunchbang VM with two interfaces, eth0 and eth1, each of which connects to an OpenWRT VM (eth0 being 10.232.64.20 and eth1 being 10.232.65.20). I'm using Network Manager and DHCP. My ...
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2k views

The right way for dynamic ssh port-forwarding

Want my Firefox could use localhost:9099 proxy forwarded from vps server, why it doesn't it work this way? I always get bind: Address already in use $ ssh -vfND 127.0.0.2:9099 vpn OpenSSH_5.9p1, ...
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1k views

How to efficiently use Console2 with screen/tmux/byobu?

I'm using Console 2 and msysgit's bash to SSH into my Linux machines. There, I'm using screen (but considering tmux and/or byobu), but currently simply with one single-terminal session per ...
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472 views

Launching app over SSH with DISPLAY when user not logged in

After searching and searching without any luck I'm hoping someone here can enlighten me. I have a PC (Ubuntu with encrypted home dir). I wake this PC up from a shell script on my phone, the PC shows ...
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32 views

Using autossh to create a persistent, multiplexed ssh connection without any port forwarding?

I want to use autossh to maintain an ssh session configured for multiplexing. This way I can write scripts on my localhost that take advantage of the persistent ssh connection. I'm having trouble ...
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41 views

Tunnel audio chat over ssh

I'm running a HelpDesk for internal call center employees. Right now, we can chat with employees over our web portal and remote-control their Linux Mint workstations via VNC over a secure SSH tunnel. ...
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31 views

Toolbar icons unable to load when running Emacs through xhost from FreeBSD to Ubuntu

I'm connected to a FreeBSD Computer using ssh [ip] -X, and emacs launches just fine, but this happens and all the icons are little pieces of paper with red X's: > emacs (emacs:22812): ...
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38 views

ssh terminating immediately with message Terminated

I have tried following command on my local system (Ubuntu 14.04 LTS): $ ssh localhost The authenticity of host 'localhost (127.0.0.1)' can't be established. ECDSA key fingerprint is ...
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37 views

How do I test sshguard on debian?

I want to replace fail2ban with sshguard because it uses less resources. I installed sshguard via apt-get and it seems to be running on my debian wheezy server: # /etc/init.d/sshguard status sshguard ...
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22 views

What's the approximate data scale that an ssh session will consume?(without file exchange)

When traveling during holidays, sometimes I need use my mobile as a WiFi hotspot to let my notebook connect to server to do some task. Then a question comes to my mind: How much web data will be ...
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48 views

Avoid creation of .k5login file in a SFTP Chroot configuration

I've successfully set up an sftp with authentication on Active Directory. All users in a particular AD group are managed by SSH's sftp subsystem and chrooted into a common home directory, let's say ...
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39 views

Forwarding C-c to a remote tmux session

I have bind C-c new-window (and other similar bindings, but only C-c is giving me an issue) in my .tmux.conf. On a local tmux session, the binding works as expected, but in a remote tmux session(over ...
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94 views

Increase SSH ConnectTimeout greater than 60 seconds

I don't seem to be able to increase the SSH connection timeout much beyond a minute: $ date; ssh home-qnap -o ConnectTimeout=7200; date Wed 14 Jan 2015 15:23:32 AEDT ssh: connect to host home-qnap ...
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51 views

X forwarding from a mac to Linux fails

I have been having problems recently while trying to ssh into linux servers (Ubuntu 14.04) from my mac (OSX Yosemite 10.10). This used to work fine until my latest update, where I systematically get a ...
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180 views

Fedora 20: irqbalance problems in logs, strange behavior

I'm seeing unexplained network behavior, such as sporadic inability to reach beyond the subnet, passwords rejected for no apparent reason, and SSH attempts constantly yielding that irksome ...
2
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171 views

Determine DBUS_SESSION_BUS_ADDRESS from outside the X session

I've got mate-screensaver installed on a machine running Linux Mint 16. On that machine, I can open up a terminal and query the state of the screensaver: dan@box1 ~ $ echo $DISPLAY :0.0 dan@box1 ~ $ ...
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102 views

How to find out what triggers ssh-askpass prompting for passphrase periodically

I recently deleted the contents of my ~/.ssh directory and generated new keys. They new ones work fine, but every once in a while I am getting a gui dialog titled OpenSHH from asking for the ...
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81 views

SSH SOCKS5 proxy, is my traffic being kept safe?

So I've been running everything on my system through my SSH SOCKS5 proxy. All the network commands I type in the terminal, I use proxy chains, and I have my system set to use my SOCKS5 proxy globally ...
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512 views

SSH public key login fails without pattern

I'm running a bunch of servers with Ubuntu 14.04.1 (sun,hyperion,...) all of which use public keys (OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 on all machines) for rsync without problems. Almost all... ...
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144 views

Kerberos Forwarding in SSSD

So, I'm trying to set up forwarding with Kerberos and seem to have some problems. On some of my servers I'm able to forward after receiving a ticket; however, some I'm not. My system setup is a ...
2
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175 views

iptables rule to transfer UDP through a SSH tunnel

The problem I have two programs that runs on two distant computers and communicate through a specific protocol. All I know is that this protocol only communicates through UDP and uses the ports 1101 ...
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208 views

SSH Failing to fork with sshpass

I've a problem with port forwarding command using sshpass. Problem is that it's working on one server and does not work on another. Both are Debian 7 x64 boxes. sshpass -p password ssh -f -D ...
2
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249 views

How to pass multiple commands via pssh and multiple xterms

I'm attempting to open multiple xterms and run a command as an SAP user via sudo using pssh. So far, I'm able to run PSSH to a file of servers with no check for keys, open every xterm in the servers ...
2
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256 views

Cannot connect to ssh server

I am having trouble connecting to my ssh server. It responds with a lengthy error message about no network etc. but it is the last message that concerns me: Sometimes, such troubles can be caused ...
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340 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 ...
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68 views

Remote script cleaning up

I run a remote script using ssh: local script: local_command ssh -p 222 user@server 'sh -s' < ./remote_run.sh remote script: some_command & sleep 10000 trap 'echo exiting' SIGINT SIGTERM ...
2
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2k views

SSH & ForwardX11 vs ForwardX11Trusted --> beyond my grasp

I am on Ubuntu 14.04 and trying to get my head around ForwardX11 vs ForwardX11Trusted. My default ssh_config contains the following lines: # ForwardX11 no # ForwardX11Trusted yes Further, man ...
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261 views

Using nvidia-settings over ssh

Now the new nvidia-driver has implemented CoolBits for the newer graphics cards I'm attempting to control fan/clock speed over ssh. When attempting to run anything with nvidia-settings via ssh I get ...
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373 views

How does SELinux / SEAndroid prevent or allow pseudo terminal allocation?

I'm trying to resolve an SSH connection issue on an Android phone running SELinux in "Enforcing" mode. The problem is that any SSH connection that tries to allocate a pseudo-terminal (/dev/pts etc) is ...
2
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1k 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 ...
2
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0answers
81 views

Why VMware DHCP persists getting offline?

I am trying to set up a SSH server in my remote machine which is running Windows 7 on it currently. So first I set up a Oracle VirtualBox but it did not work for me properly. Then I decided to go with ...
2
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2k views

Unexpected “authenticity of host can't be established.”

Few months ago, I logged to server1 and scp files to server2. Now I want to do the same, but after the scp command I get message: The authenticity of host ... can't be established. RSA key ...
2
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264 views

Autofs home directories with passwordless logins

I want a setup where a user home directory is mounted on login (autofs). This is working with password based authentication. However, I want passwordless authentication, by generating public keys. ...