![Forrest logo](/images/logo.png)
expect:tldr:90da3
The given command is using the expect
utility with a one-line script provided as an argument through the -c
option.
Here's a breakdown of the command:
expect
is a program used to automate interactive applications by scripting their behavior.-c
is an option that allows specifying the commands directly as an argument, rather than from a separate script file.${commands}
is a placeholder for the actual commands that need to be executed.
In practice, you would replace ${commands}
with the actual code or script you want expect
to execute. For example, if you want to automate a series of interactions with an application, you would place those interactions as a series of commands inside ${commands}
.
To give a clearer understanding, here's an example of how you could use the expect
command with the -c
option:
expect -c "
spawn ssh user@hostname
expect \"password:\"
send \"MyPassword\r\"
expect \"\$ \"
send \"ls\r\"
expect \"\$ \"
send \"exit\r\"
expect eof
"
In the above example, the expect
command connects to a remote host using SSH, sends the password, executes the ls
command, exits the SSH session, and expects the end of the connection. This particular script is given directly to expect
using the -c
option.