Setup SFTP to use public-key authentication

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隐瞒了意图╮
隐瞒了意图╮ 2021-02-20 10:46

How do you setup server to server SFTP to use public-key authentication instead of user account and password?

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  • 2021-02-20 10:58

    Remember to

    chmod 700 .ssh
    

    and also

    chmod 600 authorized_keys
    
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  • 2021-02-20 11:08

    In the client you need to generate its public key and add it to server's authorized key list.

    The following are the commands you can use.

    On client machine

    ssh-keygen -t dsa -f id_dsa
    mv id_dsa* ~/.ssh/
    scp ~/.ssh/id_dsa.pub USER_NAME@SERVER:~/.ssh/HOST_NAME.key
    

    On the server

    cat ~/.ssh/HOST_NAME.key >> ~/.ssh/authorized_keys2
    
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  • 2021-02-20 11:14

    This is a solution for windows users

    I had a similar issue on windows so I used Putty from http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

    If you need to generate a public key then use: http://the.earth.li/~sgtatham/putty/latest/x86/puttygen.exe

    Then, when you want to automate a batch to download from the FTP server the Pageant in order to load the private key into session http://the.earth.li/~sgtatham/putty/latest/x86/pageant.exe

    Then use the PSFTP to connect and perform actions http://the.earth.li/~sgtatham/putty/latest/x86/psftp.exe

    So here is sample code for the batch:

    !--Loading the key to session--!
    @C:\pageant.exe "C:\privatekey.ppk"
    !--Calling the PSFTP.exe with the uaser and sftp address + command list file--!
    @C:\psftp user@your.server.address -b C:\sftp_cmd.txt
    

    Command list file (sftp_cmd.txt) will like like this:

    mget "*.*" !--downloading every thing
    !--more commands can follow here
    close
    

    Now, all you need to to schedule it in scheduled tasks *I wish it was simple as unix's cron job....

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