Linux Shell Interactive Walkthrough

--stdin indicates that a standard input can be made with any file

Expect its main function is to add a shell to the SSH process to pass the interactive instructions.

Its core is the spawn expect send set

Spawn calling the command to execute

Expect waits for the command prompt to appear, which is the prompt to capture user input:

Send sends values that need to be interacted with instead of manually entering content by the user

Set Variable Value

Interact execution finishes maintaining interactive state

Expect EOF this must be added, corresponding to the spawn indicates that the capture terminal is completed and exited

Example:

[email protected] ~]# cat test.sh

#!/bin/bash

#

#!/bin/bash

#

Expect < set timeout-1

Spawn Mysql-uroot-p

Expect "Password:"

Send "123456\r"

Expect "mysql>"

Send "CREATE Database aaa;\r"

Expect "mysql>"

Send "exit\r"

Expect EOF

Eof

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Linux Shell Interactive Walkthrough