When going through one shell script, i saw the term $?. What is the significance of this term? 它是操作系统的命令行接口，允许您根据自己的条件执行任何类型的操作。 此外，linux shell不仅是一个接口，而且是一种具有自己的语法和语义集的成熟脚本语言。 常用的linux shell 1.
SHELL SHOCKERS Unblocked play Now at Game Oop
Shell 可直译为“贝壳”，贝壳是动物作为外在保护的一种工具。可以理解为：linux中的 shell就是 linux内核 的一个外层保护工具，并负责完成用户与内核之间的交互。 命令是用户向系统内核发出控制请. Can you give examples for uses of. What does $# mean in shell?
It seems < is for passing file (or directory), << @ for passing multiple lines (similar to the banner command in cisco switches;
As terminated by a custom string @ in this case), and <<< to pass a.
