How to pass password to scp

Question

I know it is not recommended  but is it at all possible to pass the user s password to scp   I d like to copy a file via scp as part of a batch job and the receiving server does  of course  need a password and  no  I cannot easily change that to key-based authentication

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I found this really helpful answer here   rsync -r -v --progress -e ssh user remote-system  address to remote file  home user    Not only you can pass there the password  but also it will show the progress bar when copying  Really awesome

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Make sure password authentication is enabled on the target server  If it runs Ubuntu  then open  etc ssh sshd config on the server  find lines PasswordAuthentication no and comment all them out  put   at the start of the line   save the file and run sudo systemctl restart ssh to apply the configuration  If there is no such line then you re done  Add -o PreferredAuthentications  quot password quot  to your scp command  e g   scp -o PreferredAuthentications  quot password quot   path to file user server  destination directory

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just generate a ssh key like   ssh-keygen -t rsa -C  your email youremail com    copy the content of    ssh id rsa pub and lastly add it to the remote machines    ssh authorized keys  make sure remote machine have the permissions 0700 for    ssh folder and 0600 for    ssh authorized keys

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You may use ssh-copy-id to add ssh key    which ssh-copy-id  check whether it exists   If exists   ssh-copy-id   user remote-system

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Nobody mentioned it  but Putty scp  pscp  has a -pw option for password   Documentation can be found here   https   the earth li  sgtatham putty 0 67 htmldoc Chapter5 html pscp

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If you are connecting to the server from Windows  the Putty version of scp   pscp   lets you pass the password with the -pw parameter   This is mentioned in the documentation here

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make sure you have  expect  tool before  if not  do it    apt-get install expect create the a script file with following content     vi  root scriptfile   spawn scp  path from file name user name here to host name  path to  expect  password    send put password here n   interact execute the script file with  expect  tool    expect  root scriptfile

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In case if you observe a strict host key check error then use -o StrictHostKeyChecking no -o UserKnownHostsFile  dev null options  The complete example is as follows sshpass -p  quot password quot  scp -o StrictHostKeyChecking no -o UserKnownHostsFile  dev null root domain-name com  tmp from psoutput  tmp to psoutput

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curl can be used as a alternative to scp to copy a file and it supports a password on the commandline    curl --insecure --user username password -T  path to sourcefile sftp   desthost path

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You can script it with a tool like expect  there are handy bindings too  like Pexpect for Python

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steps to get sshpass For rhel centos 6       wget http   epel mirror net in epel 6 i386 epel-release-6-8 noarch rpm   rpm -ivh epel-release-6-8 noarch rpm   yum install sshpass   source  https   community mapr com thread 9040

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An alternative would be add the public half of the user s key to the authorized-keys file on the target system  On the system you are initiating the transfer from  you can run an ssh-agent daemon and add the private half of the key to the agent  The batch job can then be configured to use the agent to get the private key  rather than prompting for the key s password   This should be do-able on either a UNIX Linux system or on Windows platform using pageant and pscp

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All the solutions mentioned above can work only if you the app installed or you should have the admin rights to install except or sshpass   I found this very useful link to simply start the scp in Background     nohup scp file to copy user server  path to copy the file  gt  nohup out 2 gt  amp 1   https   charmyin github io scp 2014 10 07 run-scp-in-background

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Here s a poor man s Linux Python Expect-like example based on this blog post  Upgrading simple shells to fully interactive  TTYs  I needed this for old machines where I can t install Expect or add modules to Python   Code         echo  scp jmudd mysite com   install sh        sleep 5     echo  scp-passwd      sleep 5     echo  exit       python -c  import pty  pty spawn   usr bin bash      Output   scp jmudd mysite com install sh   bash-4 2  scp jmudd mysite com install sh   Password   install sh                                 100    15KB 236 2KB s   00 00     bash-4 2  exit exit

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Use sshpass   sshpass -p  password  scp -r user example com  some remote path  some local path   or so the password does not show in the bash history  sshpass -f   path to passwordfile  scp -r user example com  some remote path  some local path   The above copies contents of path from the remote host to your local    Install     ubuntu debian   apt install sshpass  centos fedora   yum install sshpass  mac w  macports   port install sshpass  mac w  brew   brew install https   raw githubusercontent com kadwanev bigboybrew master Library Formula sshpass rb

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Here is an example of how you do it with expect tool  sub copyover        scp   Expect- gt spawn  quot  usr bin scp   srcpath   file  who   destpath   file quot         scp- gt expect 30  quot ssword   quot      die  quot Never got password prompt from  dest    n quot       print  scp  password     quot  n quot        scp- gt expect 30  quot -re quot     s      die  quot Never got prompt from parent system    n quot        scp- gt soft close        return

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You can use the  expect  script on unix terminal  For example create   test exp        usr bin expect         spawn scp   usr bin file txt root  lt ServerLocation gt   home         set pass  Your Password          expect           password   send   pass r   exp continue                        run the script   expect test exp    I hope that helps

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Once you set up ssh-keygen as explained above  you can do   scp -i    ssh id rsa  local path to file remote ip com  path in remote server   If you want to lessen typing each time  you can modify your  bash profile file and put  alias remote scp  scp -i    ssh id rsa  local path to file remote ip com  path in remote server    Then from your terminal do source    bash profile  Afterwards if you type remote scp in your terminal it should run the scp command without password

[linux] How to pass password to scp?

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