Could not open a connection to your authentication agent

Question

I am running into this error of      git push heroku master Warning  Permanently added the RSA host key for IP address  50 19 85 132  to the list of known hosts     Your key with fingerprint b7 fd 15 25 02 8e 5f 06 4f 1c af f3 f0 c3 c2 65 is not authorized to access bitstarter    I tried to add the keys and I get this error below     ssh-add    ssh id rsa pub Could not open a connection to your authentication agent

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Read  cupcake s answer for explanations  Here I only try to automate the fix   If you using Cygwin terminal with BASH  add the following to  HOME  bashrc file  This only starts ssh-agent once in the first Bash terminal and adds the keys to ssh-agent   Not sure if this is required on Linux                                 start ssh-agent for   ssh authentication with github com                             SSH AUTH SOCK FILE  tmp SSH AUTH SOCK sh if     -e  SSH AUTH SOCK FILE    then       need to find SSH AUTH SOCK again        restarting is an easy option     pkill ssh-agent fi   check if already running SSH AGENT PID  pgrep ssh-agent  if    x SSH AGENT PID      x     then     echo  not running  starting      eval   ssh-agent -s   gt   dev null     rm -f  SSH AUTH SOCK FILE     echo  export SSH AUTH SOCK  SSH AUTH SOCK   gt   SSH AUTH SOCK FILE     ssh-add  HOME  ssh github com id rsa 2 gt  amp 1  gt   dev null  else     echo  already running  fi source  SSH AUTH SOCK FILE   DONT FORGET to add your correct keys in  ssh-add  command

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I faced the same problem for Linux  and here is what I did   Basically  the command ssh-agent starts the agent  but it doesn t really set the environment variables for it to run  It just outputs those variables to the shell   You need to   eval  ssh-agent    and then do ssh-add  See Could not open a connection to your authentication agent

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Use parameter -A when you connect to server  example   ssh -A root myhost   from man page     -A Enables forwarding of the authentication agent connection       This can also be specified on a per-host basis in a configuration file      Agent forwarding should be enabled with caution   Users with the ability to bypass file permissions on the remote host  for the agent s    UNIX-domain socket  can access the local agent through the forwarded     connection   An attacker cannot obtain key material from the agent     however they can perform operations on the keys that enable them to    authenticate using the identities loaded into the agent

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Could not open a connection to your authentication agent  To resolve this error   bash     eval  ssh-agent -s    tcsh     eval  ssh-agent -c    Then use ssh-add as you normally would     Hot Tip   I was always forgetting what to type for the above ssh-agent commands  so I created an alias in my  bashrc file like this   alias ssh-agent-cyg  eval  ssh-agent -s     Now instead of using ssh-agent  I can use ssh-agent-cyg  E g     ssh-agent-cyg SSH AUTH SOCK  tmp ssh-n16KsxjuTMiM agent 32394  export SSH AUTH SOCK  SSH AGENT PID 32395  export SSH AGENT PID  echo Agent pid 32395    ssh-add    ssh my pk     Original Source of fix   http   cygwin com ml cygwin 2011-10 msg00313 html

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Try to the following steps    1  Open Git Bash and run  cd    ssh   2  Try to run agent    eval   ssh-agent   3  Right now  you can run the following command   ssh-add -l

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I had this problem  when I started ssh-agent  when it was already running   Gets confused   To see if this is the case  use  eval   ssh-agent    to see if this is the same as what you thought it should be  In my case  it was different than the one I just started   To further verify if you have more than one ssh-agent running  you can review   ps -ef   grep ssh

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The following command worked for me  I am using CentOS   exec ssh-agent bash

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In my case  my Comodo firewall had sandboxed the ssh agent  Once I disabled sandboxing I was able to clone the repository   FYI  I am using Comodo firewall on Windows 7

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If you follow these instructions  your problem would be solved   If you   re on a Mac or Linux machine  type   eval    ssh-agent -s     If you   re on a Windows machine  type   ssh-agent -s

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One thing I came across was that eval did not work for me using Cygwin  what worked for me was ssh-agent ssh-add id rsa   After that I came across an issue that my private key was too open  the solution I managed to find for that  from here    chgrp Users id rsa   as well as  chmod 600 id rsa   finally I was able to use   ssh-agent ssh-add id rsa

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Note  this is an answer to this question  which has been merged with this one    That question was for Windows 7  meaning my answer was for Cygwin MSYS MSYS2  This one seems for some unix  where I wouldn t expect the SSH agent needing to be managed like this    This will run the SSH agent and authenticate only the first time you need it  not every time you open your Bash terminal  It can be used for any program using SSH in general  including ssh itself and scp  Just add this to  etc profile d ssh-helper sh   ssh-auth           Start the SSH agent only if not running        -z   ps   grep ssh-agent      amp  amp  echo   ssh-agent   gt   tmp ssh-agent-data sh        Identify the running SSH agent        -z  SSH AGENT PID     amp  amp  source  tmp ssh-agent-data sh  gt   dev null        Authenticate  change key path or make a symlink if needed         -z   ssh-add -l   grep   home   whoami   ssh id rsa       amp  amp  ssh-add      You can repeat this for other commands using SSH git     ssh-auth  command git

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I resolved the error by force stopping  killed  git processes  ssh agent   then uninstalling Git  and then installing Git again

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Let me offer another solution   If you have just installed Git 1 8 2 2 or thereabouts  and you want to enable SSH  follow the well-writen directions   Everything through to Step 5 6 where you might encounter a slight snag   If an SSH agent is already be running you could get the following error message when you restart bash  Could not open a connection to your authentication agent   If you do  use the following command to see if more than one ssh-agent process is running  ps aux   grep ssh   If you see more than one ssh-agent service  you will need to kill all of these processes   Use the kill command as follows  the PID will be unique on your computer   kill  lt PID gt    Example   kill 1074   After you have removed all of the ssh-agent processes  run the px aux   grep ssh command again to be sure they are gone  then restart Bash   Voila  you should now get something like this   Initializing new SSH agent    succeeded Enter passphrase for  c Users username  ssh id rsa    Now you can continue on Step 5 7 and beyond

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Here is the solution I came up with when using PowerShell   Add the below function to your Microsoft PowerShell profile ps1  function RunSsh  userIdentity         agent ssh-agent     position  agent 0  IndexOf          ending  agent 0  IndexOf           variableStartPosition  agent 0  IndexOf  export       variableEndPosition  agent 0  LastIndexOf          variableName  agent 0  Substring  variableStartPosition 7  variableEndPosition- variableStartPosition-7      Environment   SetEnvironmentVariable  variableName   agent 0  Substring  position 1  ending- position-1        position  agent 1  IndexOf          ending  agent 1  IndexOf           variableStartPosition  agent 1  IndexOf  export       variableEndPosition  agent 1  LastIndexOf          variableName  agent 1  Substring  variableStartPosition 7  variableEndPosition- variableStartPosition-7      Environment   SetEnvironmentVariable  variableName   agent 1  Substring  position 1  ending- position-1       if  userIdentity Length -eq 0          ssh-add      else         ssh-add  userIdentity          Now from the command line you can run RunSsh which uses identity file in    ssh folder or pass in the identity file with RunSsh C  ssh id rsa where C  ssh id rsa is your identity file   For this to work you need to have ssh-add and ssh-agent in your path environment variable

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If you are using Putty  perhaps you need to set the  Connection SSH Auth Allow agent forwarding  option to  true

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To amplify on n3o s answer for Windows 7     My problem was indeed that some required environment variables weren t set  and n3o is correct that ssh-agent tells you how to set those environment variables  but doesn t actually set them   Since Windows doesn t let you do  eval   here s what to do instead   Redirect the output of ssh-agent to a batch file with  ssh-agent  gt  temp bat   Now use a text editor such as Notepad to edit temp bat  For each of the first two lines  - Insert the word  set  and a space at the beginning of the line  - Delete the first semicolon and everything that follows   Now delete the third line  Your temp bat should look something like this   set SSH AUTH SOCK  tmp ssh-EorQv10636 agent 10636 set SSH AGENT PID 8608   Run temp bat  This will set the environment variables that are needed for ssh-add to work

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For PowerShell in Windows  I was having trouble with PoSH and the Start-SshAgent   Add-SshKey commands  so I whipped up a quick script that might help some folks out  This is intended to be added to your PowerShell profile which you can edit by executing notepad  PROFILE  if    Get-Process ssh-agent  -eq  null         ExecutionContext InvokeCommand ExpandString   ssh-agent -c  Replace  setenv    set         It will detect if the ssh-agent is running or not and only execute if there is no agent running already  Please note that  ExecutionContext InvokeCommand ExpandString is a pretty dangerous command so you may not want to use this solution if you are using an untrusted copy of ssh-agent

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Instead of using   ssh-agent -s   I used   eval  ssh-agent -s  to solve this issue   Here is what I performed step by step  step 2 onwards on GitBash     Cleaned up my  ssh folder at C  user  lt username gt   ssh  Generated a new SSH key   ssh-keygen -t rsa -b 4096 -C  xyz abc com  Check if any process id ssh agent  is already running    ps aux   grep ssh  Optional  If found any in step 3  kill those   kill  lt pids gt  Started the ssh agent   eval  ssh-agent -s  Added ssh key generated in step 2 to ssh agent   ssh-add    ssh id rsa

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For window users  I found cmd eval  ssh-agent -s  didn t work  but using git bash worked a treat eval  ssh-agent -s   ssh-add KEY LOCATION  and making sure the windows service  OpenSSH Key Management  wasn t disabled

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In Windows 10 I tried all answers listed here but none of them seemed to work  In fact they give a clue  To solve a problem simply you need 3 commands  The idea of this problem is that ssh-add needs SSH AUTH SOCK and SSH AGENT PID environment variables to be set with current ssh-agent sock file path and pid number   ssh-agent -s  gt  temp txt   This will save output of ssh-agent in file  Text file content will be something like this   SSH AUTH SOCK  tmp ssh-kjmxRb2764 agent 2764  export SSH AUTH SOCK  SSH AGENT PID 3044  export SSH AGENT PID  echo Agent pid 3044    Copy something like   tmp ssh-kjmxRb2764 agent 2764  from text file and run following command directly in console   set SSH AUTH SOCK  tmp ssh-kjmxRb2764 agent 2764   Copy something like  3044  from text file and run following command directly in console    set SSH AGENT PID 3044   Now when environment variables  SSH AUTH SOCK and SSH AGENT PID  are set for current console session run your ssh-add command and it will not fail again to connect ssh agent

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I tried the other solutions to no avail  I made more research and found that the following command worked  I am using Windows nbsp 7 and Git Bash   eval   ssh-agent    More information in  https   coderwall com p rdi wq

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Even I was getting  Could not open a connection to your authentication agent   on running the command while generating and adding SSH key  ssh-add    ssh id rsa  I resolved it by stopping the multiple ssh-agent instances running on my machine and then uninstalled the Git from control panel on my windows machine and then again installed Git and things were working now

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Did You Start ssh-agent   You might need to start ssh-agent before you run the ssh-add command   eval  ssh-agent -s  ssh-add   Note that this will start the agent for msysgit Bash on Windows  If you re using a different shell or operating system  you might need to use a variant of the command  such as those listed in the other answers   See the following answers    ssh-add complains  Could not open a connection to your authentication agent Git push requires username and password  contains detailed instructions on how to use ssh-agent  How to run  git ssh  authentication agent   Could not open a connection to your authentication agent   To automatically start ssh-agent and allow a single instance to work in multiple console windows  see Start ssh-agent on login   Why do we need to use eval instead of just ssh-agent   To find out why  see Robin Green s answer   Public vs Private Keys  Also  whenever I use ssh-add  I always add private keys to it  The file    ssh id rsa pub looks like a public key  I m not sure if that will work   Do you have a    ssh id rsa file  If you open it in a text editor  does it say it s a private key

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Also check you remote url  use git github    instead of https    proptocol  see https   stackoverflow com a 33928364 551811

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This worked for me      In the CMD window  type the following command    cd path-to-Git bin    for example cd C  Program Files Git bin  bash exec ssh-agent bash ssh-add path to  ssh id rsa

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MsysGit or Cygwin  If you re using Msysgit or Cygwin you can find a good tutorial at SSH-Agent in msysgit and cygwin and bash    Add a file called  bashrc to your home folder  Open the file and paste in      bin bash eval  ssh-agent -s  ssh-add  This assumes that your key is in the conventional    ssh id rsa location  If it isn t  include a full path after the ssh-add command  Add to or create file    ssh config with the contents  ForwardAgent yes   In the original tutorial the ForwardAgent param is Yes  but it s a typo  Use all lowercase or you ll get errors  Restart Msysgit  It will ask you to enter your passphrase once  and that s it  until you end the session  or your ssh-agent is killed     Mac OS X  If you don t want to start a new ssh-agent every time you open a terminal  check out Keychain  I m on a Mac now  so I used the tutorial ssh-agent with zsh  amp  keychain on Mac OS X to set it up  but I m sure a Google search will have plenty of info for Windows   Update  A better solution on Mac is to add your key to the Mac OS Keychain   ssh-add -K    ssh id rsa   Simple as that

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For bash built into Windows 10  I added this to  bash profile   if   -z  SSH AUTH SOCK    then     if   -r    ssh env    then             source    ssh env             if    ps -p  SSH AGENT PID   wc -l    1    then                     rm    ssh env                     unset SSH AUTH SOCK             fi     fi fi  if   -z  SSH AUTH SOCK    then     ssh-agent -s   sed  s  echo  echo   gt     ssh env     chmod 600    ssh env     source    ssh env  gt   dev null 2 gt  amp 1 fi

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ssh-add and ssh  assuming you are using the openssh implementations  require an environment variable to know how to talk to the ssh agent  If you started the agent in a different command prompt window to the one you re using now  or if you started it incorrectly  neither ssh-add nor ssh will see that environment variable set  because the environment variable is set locally to the command prompt it s set in    You don t say which version of ssh you re using  but if you re using cygwin s  you can use this recipe from SSH Agent on Cygwin      Add to your Bash config file SSHAGENT  usr bin ssh-agent SSHAGENTARGS  -s  if   -z   SSH AUTH SOCK  -a -x   SSHAGENT     then     eval   SSHAGENT  SSHAGENTARGS      trap  kill  SSH AGENT PID  0 fi   This will start an agent automatically for each new command prompt window that you open  which is suboptimal if you open multiple command prompts in one session  but at least it should work

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I had a similar problem when I was trying to get this to work on Windows to connect to stash via ssh  Here is the solution that worked for me    Turns out I was running Pageant ssh agent on my Windows box - I would check what you are running  I suspect it is Pageant as it comes as default with Putty and winScp The ssh-add does not work from command line with this type of agent You need to add the private key via pageant UI window which you can get by doublicking the Pageant icon in the taskbar  once it is started   Before you add the key to Pageant you need to convert it to PPK format  Full instructions are available here How to convert SSH key to ppk format That is it  Once I uploaded my key to stash I was able to use SourceTree to create a local repo and clone the remote    Hope this helps

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Run  ssh-agent bash ssh-add   To get more details you can search   ssh-agent   or run  man ssh-agent

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I just got this working   Open your    ssh config file   Append the following-  Host github com  IdentityFile    ssh github rsa   The page that gave me the hint Set up SSH for Git said that the single space indentation is important    though I had a configuration in here from Heroku that did not have that space and works properly

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In Windows 10  using the Command Prompt terminal  the following works for me  ssh-agent cmd  ssh-add  You should then be asked for a passphrase after this  Enter passphrase for  c Users username  ssh id rsa

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I had the same problem on Ubuntu and the other solutions didn t help me  I finally realized what my problem was  I had created my ssh keys in  root  ssh folder  So even when I ran ssh-add as root  it couldn t do its work and keep saying   Could not open a connection to your authentication agent    I created my ssh public and private keys in  home myUsername  folder and I used    ssh-agent  bin sh   then I ran   ssh-add  home myUsername  ssh id rsa   and problem was solved this way   Note  For accessing your repository on git add your git password when you are creating ssh keys with ssh-keygen -t rsa -C  your git email here

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Using Git Bash on Win8 1E  my resolution was as follows   eval   ssh-agent   gt   dev null ssh-add    ssh id rsa

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The basic solution to run ssh-agent is answered in many answers  However runing ssh-agent many times  per each opened terminal or per remote login  will create a many copies ot ssh-agent running in memory  The scripts which is suggested to avoid that problem is long and need to write and or copy separated file or need to write too many strings in    profile or    schrc  Let me suggest simple two string solution   For sh  bash  etc        profile if   pgrep -q -U  whoami  -x  ssh-agent   then ssh-agent -s  gt     ssh-agent sh  fi      ssh-agent sh   For csh  tcsh  etc        schrc sh -c  if   pgrep -q -U  whoami  -x  ssh-agent   then ssh-agent -c  gt     ssh-agent tcsh  fi  eval  cat    ssh-agent tcsh    What is here    search the process ssh-agent by name and by current user create appropriate shell script file by calling ssh-agent and run ssh-agent itself if no current user ssh-agent process found evaluate created shell script which configure appropriate environment   It is not necessary to protect created shell script    ssh-agent tcsh or    ssh-agent sh from another users access because  at-first communication with ssh-agent is processed through protected socket which is not accessible to another users  and at-second another users can found ssh-agent socket simple by enumeration files in  tmp  directory  As far as about access to ssh-agent process it is the same things

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Try the following   ssh-agent sh -c  ssh-add  amp  amp  git push heroku master

[git] Could not open a connection to your authentication agent

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