How to pass password to scp?

问题

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.

回答1:

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

回答2:

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

回答3:

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

回答4:

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.

回答5:

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/

回答6:

You can use the 'expect' script on unix/terminal

For example create 'test.exp' :

#!/usr/bin/expect
        spawn scp  /usr/bin/file.txt root@<ServerLocation>:/home
        set pass "Your_Password"
        expect {
        password: {send "$pass\r"; exp_continue}
                  }

run the script

expect test.exp

I hope that helps.

回答7:

Here is an example of how you do it with expect tool:

sub copyover {
    $scp=Expect->spawn("/usr/bin/scp ${srcpath}/$file $who:${destpath}
+/$file");
    $scp->expect(30,"ssword: ") || die "Never got password prompt from
+ $dest:$!\n";
    print $scp 'password' . "\n";
    $scp->expect(30,"-re",'$\s') || die "Never got prompt from parent 
+system:$!\n";
    $scp->soft_close();
    return;
}

回答8:

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

回答9:

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"

回答10:

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

回答11:

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.

回答12:

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.

回答13:

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

回答14:

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 > nohup.out 2>&1

https://charmyin.github.io/scp/2014/10/07/run-scp-in-background/

回答15:

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

回答16:

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.

来源：https://stackoverflow.com/questions/50096/how-to-pass-password-to-scp

标签

Linux

scp

io-redirection