Thisismy second command I can even putinother commands besides echo; ls:/home/_driver/.b*: No suchfileordirectory shijianzhongdeMacBook-Pro:part_12 shijianzhong$ cat test3.sh #! /bin/bash testuser=_driver ifgrep $testuser/etc/passwd# 如果匹配不到就不会执行then语句 then echo"This is m...
do commands done 也可以写成 for var in list; do commands done 读取列表中的值 1 2 3 4 5 6 7 8 9 10 11 12 13 14 shijianzhongdeMacBook-Pro:part_13 shijianzhong$ ./test1 Thenextstate Alabama Thenextstate Alaska Thenextstate Arizona Thenextstate Arkansas Thenextstate California Thenextstat...
Shell Script Functions How to define a function Varibale scopes Return statement break vs exit vs return How to call functions present in another script Linux Commands Help man, help, apropos, whereis, whatis, which: commands that give help about a given command. man -k text: searches for...
The authoritative guide to Linux command line and shell scripting?completely updated and revised [it's not a guide to Linux as a whole ? just to scripting] The Linux command line allows you to type specific Linux commands directly to the system so that you can easily manipulate files and qu...
多孔介质流-固-热三场全耦合数学模型及数值模拟 给出多孔岩体介质的流–固–热三场全耦合数学模型.假定流体为单相流,固体介质为非沸腾的饱和,热弹性多孔介质,该模型由流体物质守恒方程,力学平衡方程和能量守恒方程这3个相互耦合的方程组成,其中包含了众多耦合项,并定义一系列的本构关系及耦合变量.以FEML... 赵长海...
Chapter 10: More Structured Commands.Chapter 11: Handling User Input.Chapter 12: Presenting Data.Chapter 13: Script Control.Part III Advanced Shell Scripting.Chapter 14: Creating Functions.Chapter 15: Adding Color to Scripts.Chapter 16: Introducing sed and gawk.Chapter 17: Regular Expressions.Chapter...
such as distribution, LiveCD, and GNU when looking at Linux packages and been confused. Trying to wade through the world of Linux for the first time can be a tricky experience. This chapter will take some of the mystery out of the Linux system before we start working on commands and ...
Cheat allows you to create and view interactive cheatsheets on the command-line. It was designed to help remind *nix system administrators of options for commands that they use frequently, but not frequently enough to remember. cheat.sh Aggregates cheat sheets from multiple sources (including tldr...
Shell commands 例如pwd, test, echo, continue, type等命令 Linux binary commands 例如w, who, free, etc等 文本处理程序例如grep, awk, cut等 函数可以将多个操作整合进一个函数 控制流例如if...then...else或者shell loop去执行重复的操作 每个脚本都有一个目的 特殊目的:备份数据或者上传数据库(例如每隔一...
If you can enter commands into the shell, you can write shell scripts (also known as Bourne shell scripts). A shell script is a series of commands ...