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linuxshellunixcommandpassword-protection

What does spawn ,expect and send command in linux/unix

The following three lines having three commands(spawn,expect,send), but what it does actually. Please explain any one

spawn ssh -oStrictHostKeyChecking=no -oCheckHostIP=no usr@$myhost.example.com'<br>
expect "password"<br>
send "$PWD\n" <br>
EOD
Solution

  • It is part of an expect script:

    spawn opens a new process

    expect waits for the previous spawned process to output the "expected" string (password in this case)

    send writes to the spawned process stdin

    EOD has no meaning in expect, perhaps it is part of another script?