#!/bin/bash# 字符串?dāng)U展. # Bash版本2中引入的特性. #  $'xxx'格式的字符串#+ 具備解釋里面標(biāo)準(zhǔn)轉(zhuǎn)義字符的能力. echo $'Ringing bell 3 times \a \a \a'     # 可能在某些終端中, 只會(huì)響一次鈴. echo $'Three form feeds \f \f \f'echo $'10 newlines \n\n\n\n\n\n\n\n\n\n'echo $'\102\141\163\150'   # Bash                           # 8進(jìn)制的等價(jià)字符. exit 0