使用 PS2
當命令擴充套件到多行並且 bash 等待更多擊鍵時，將顯示 PS2。當輸入複合命令時，它也會顯示，例如 while … do..done 等。
export PS2="would you please complete this command?\n"
# now enter a command extending to at least two lines to see PS2
當命令擴充套件到多行並且 bash 等待更多擊鍵時，將顯示 PS2。當輸入複合命令時，它也會顯示，例如 while … do..done 等。
export PS2="would you please complete this command?\n"
# now enter a command extending to at least two lines to see PS2