huhuchen

摘要： echo $varibale 获取变量echo ${varibale}$ echo $PATH$ echo ${PATH}/usr/local/bin变量赋值 注：括号两边不能存在空格符$ username=myname$ echo $usernamemyname“” 特殊字符保持原有特性‘’ 特殊符号为一般字符$ var="name is $username"$ echo $varname is myname$ var='name is $username'$ echo $varname is $usernameunset 取消变量$ unset user 阅读全文