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learn the shell what is the shell? when we speak of the command line,we are really to the shell.Actually the shell is a program that takes keyboard commands and passes them to the opreating system to carry out. Now I start the virtualizer, I use the…
目录 Spring Shell是什么 入门实践 基础配置 简单示例 注解@ShellMethod 注解@ShellOption 自定义参数名称 设置参数默认值 为一个参数传递多个值 对布尔参数的特殊处理 带空格的参数处理 参数校验 动态命令可用性 为单一命令提供动态可用性 为多个命令提供动态可用性 命令动态可用性小结 命令分组 默认命令分组规则 使用@ShellMethod注解的group属性指定分组 使用@ShellCommandGroup注解指定分组 内置命令 写在最后 Spring She…
MongDB    数据库知识3 修改器 $inc 对某个域的值进行加减修改 $mul 对某个域的值进行乘法修改 $min 如果筛选的文档指定的值小于min则不修改,如果大于min 给定的值则修改为min值: $max 如果筛选的文档指定域的值大于max值则不变,小于max值则修改为max值: > use stu switched to db stu ,sex:'m') : E QUERY : ,sex:'m'}) : E QUERY [js] ReferenceError: stu is no…
the basic shell skills.   Bourne shell sh ksh Bash psh zsh C shell csh tcsh   [root@bogon temp]# cat /etc/shells /bin/sh /bin/bash /sbin/nologin /usr/bin/sh /usr/bin/bash /usr/sbin/nologin /bin/tcsh /bin/csh     1.echo   [root@bogon temp]# echo "hell…
http://www.grymoire.com/Unix/CshTop10.txt ======================================================================        Top Ten Reasons not to use the C shell======================================================================    Written by Bruce B…
  索引 1. 第一行必须是"#!/bin/sh" 2. 注释:一行开头为 # 3. 定义变量 4. 逻辑符号 5. 接收参数 6. 控制流:if/then/elif/else/fi 7. 循环:for/do/done 8. 格式化输出日期 9. exist 10. 系统变量 参考文档 索引 1. 第一行必须是"#!/bin/sh" 2. 注释:#号后的为注释 3. 定义变量 4. 逻辑符号 5. 接收参数 6. 控制流:if/then/elif/else/fi 7…
When a golf player is first learning to play golf, they usually spend most of their time developing a basic swing. Only gradually do they develop other shots, learning to chip, draw and fade the ball, building on and modifying their basic swing. In a…
假设有一个Py文件,放在下PycharmProjects/learn下,文件名是 myfile.py. 1.打开终端输入python3进入2.在shell下 输入import sys 回车3.输入 sys.path.append("PycharmProjects/learn") 回车4.输入 import myfile 回车 5.搞定…
Managing Shell Jobs   When moving jobs between the foreground and background, it may be useful to have an overview of all current jobs. To get such an overview, use the  jobs command. As you can see in  Table   9.2   , this command gives an overview…
假设shell脚本文件为hello.sh放在/root目录下.下面介绍几种在终端执行shell脚本的方法: [root@localhost home]# cd /root/ [root@localhost ~]#vim hello.sh #!  /bin/bash cd /tmp echo "hello guys!" echo "welcome to my Blog:linuxboy.org!" 1.切换到shell脚本所在的目录,执行: [root@localho…