/bin/bashread-p"请输入你要的动作:"actioncase$actioninstart|S)echo"service is running...";;stop|T)echo"service is stoped...";;reload|R)echo"service is restart...";;*)echo"请输入你要的动作";;esac $1:脚本后面的第一个参数。 二、函数 shell中允许将一组命令集合或语句形成一段可用代码,...
shell中的case shell支持两种分支结构,分别为if else 与case in语句。 基本格式为: case expression in pattern1) statement1 ;; pattern2) statement2 ;; ... ;; *) statement esac case会将expression 的值与pattern1,pattern2等逐个进行匹配,如果匹配成功就会执行这个模式所对应的语句。遇到双分号停止,然后...
value is typically a positional parameter or other shell variable. cmds are typically Linux commands, shell programming commands, or variable assignments. Patterns can use file-generation metacharacters. Multiple patterns (separated by |) can be specified on the same line; in this case, the ...
we constructedsome simple menus and built the logic used to act on a user’s selection. To do this, weused a series of if commands to identify which of the possible choices has been selected.This type of construct appears frequently in programs, so much so that many programminglanguages (i...
逐个执行同一组命令，直到取值完毕退出，变量值以空格分隔 语法： for 变量值 in 取值列表 do ...
First, let’s open a Mongo Shell inside the container: $ docker exec -it example-mongo mongosh Once we’re in the shell, let’s switch the context and enter the database named “sorting“: > use sorting Finally, let’s insert some data for us to try with our sort operations: > db...
case shellinformation systems developmentmethodologymethodsmodelingmodelsresearchspecifications for information systemssystems developmentComputer-aided software engineering (CASE) tools are important aids in supporting the building, changing, and maintenance of different types of large models in the area of ...
How to pass multiple -Variable from powershell invoke-sqlcmd to a tsql script ? How to pass multiple string values to a stored procedure which accepts a string parameter? how to pass Multipul integer values to a single parameter in a stored procedure How to perform cascading inserts? How to...
Printing object attributes based on user input in Python 3x First of all I'd like to say im a Python beginner (or programming beginner for that matter) and I'm trying to figure out how to print attributes from a object based on user input. This is the code I h......
1. Create the shell script: vi filelist.shCopy 2. Enter the following lines to the file: #!/bin/bash for file in $(ls) do Extension=${file##*.} case "$Extension" in sh) echo "Shell script: $file";; md) echo "A markdown file: $file";; ...