script.exp

#!/usr/bin/expect

set timeout 300
set USERNAME [lindex $argv 0]
set PASSWORD [lindex $argv 1]
set BACKUP_NAME [lindex $argv 2]

spawn ./tmp/idriveforlinux.bin --install
expect "Are you using Proxy (y/n)?" {send "n\r"}
expect "Enter your choice:" {send "1\r"}
expect "Enter your IDrive username:" {send "$USERNAME\r"}
expect "Enter your IDrive password:" {send "$PASSWORD\r"}
expect {
"1) Create new Backup Location\r
2) Select from existing Backup Locations\r
Enter your choice:" {
    send "1\r"
    expect "Enter your Backup Location"
    send "$BACKUP_NAME\r"
    }

"Do you want to change (y/n)?\r
Enter your choice" {send "n\r"}
}
expect eof