SHELL编程目录一、Shell语法...............................................................................................................21.2、数组声明和使用name[0]="Tom"....................................................................21.3、特殊的变量.......................................................................................................21.4、运算和运算符...................................................................................................51.4.1、整数运算符................................................................................................51.4.2、逻辑运算符................................................................................................61.5、流程语句...........................................................................................................71.5.2、case语句....................................................................................................71.5.3、select语句.................................................................................................81.6、循环语句...........................................................................................................91.6.2、while语句.................................................................................................91.6.3、breake和continue..................................................................................10二、函数......................................................................................................................11三、shell程序调试.....................................................................................................12四、信号......................................................................................................................13五、bash中常用的命令.............................................................................................13一、Shell语法1.1、变量声明变量＝值（注意：等号两侧不能有空格）a=”hello”b=9unseta撤销变量areadonlya=2声明静态的变量a=2，不能unsetexport变量名可把变量提升为全局环境变量，可供其他shell程序使用变量应用中要注意：echo"$1=$1;$2=$2";屏蔽$1,屏蔽$2，直接显示