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Accepted
Sandeepan Nath
Asked: 2011-01-06 02:38:09 +0800 CST

bash script - spawn, send, interact - commands not found error

  • 772

I my shell script, I am trying to remove password prompt for scp command (as given in https://stackoverflow.com/questions/459182/using-expect-to-pass-a-password-to-ssh/459225#459225) and this is what I have so far :-

#!/usr/bin/expect
spawn scp $DESTINATION_PATH/exam.tar $SSH_CREDENTIALS':/'$PROJECT_INSTALLATION_PATH
expect "password:"
send $sshPassword"\n";
interact

On running the script, I am getting errors 

spawn: command not found
send: command not found
interact: command not found

I was also getting error expect: command not found also, then I realised the path to expect was not correct and expect was not installed at all. So, I did yum install expect, corrected the path and the error was gone. But not able to remove the other 3 errors still.

linux bash shell

2 Answers

  1. Best Answer

    You're invoking the script badly.

    If you say:

    bash scriptname

    then the #! line is ignored and bash takes the file as though it were bash instructions. But this is not a bash script, it's an expect script.

    The #! line is only ever interpreted by the kernel, when given the script as a command to run in its own right.

    Either give the script execute permission, so that you can just invoke ./scriptname, or use the expect command to start the script.

    • 14

    1. make sure you have "expect" tool before, if not, do it

      # apt-get install expect

    2. 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

    3. execute the script file with "expect" tool

      # expect /root/scriptfile

    • 9