Linux--add the PPA to your system

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Linux--add the PPA to your system

Add a PPA to your system with a single line in your terminal step1:on the PPA's overview page,look for the heading that reads Adding this PPA to your system.Make a note of the PPA's location, which looks like: paa:gwibber-daily/ppa step2:open a termi…

The type 'Expression<>' is defined in an assembly that is not referenced.You must add a reference to assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

在我将一个.net framework 4.0+mvc4+ef5的项目,升级到.net framework 4.6.1+mvc5+ef6之后,解决了所有的升级带来的问题,唯独在razor的cshtml页面中,所有关于Expression<>的引用的方法全都报错,例如System.Web.Mvc.Html空间下的一系列@Html.DisplayFor()等等.razor页面可以正常编译及运行,但是页面编辑时报错,智能感知也不能正常使用. 具体的提示就是“The type 'Expression&…

The package 'MySql.Data' tried to add a framework reference to 'System.Runtime' which was not found in the GAC

最近在学习Visual Studio连接mysql EF模型.在nuget中安装mysql.data时总是提示The package 'MySql.Data' tried to add a framework reference to 'System.Runtime' which was not found in the GAC.当前mysql.data的版本是6.10.5,看描述是支持.net framework 4.5.2的.经过研究发现,把项目的.net framework 改为4.5可以…

SecureCRT connecting VM Linux show error message: The remote system refused the connection.

SecureCRT connecting VM Linux show error message: The remote system refused the connection.…

Linux Add a Swap File

http://www.cyberciti.biz/faq/linux-add-a-swap-file-howto/ Procedure To Add a Swap File Under Linux You need to use the dd command to create swap file. The mkswap command is used to set up a Linux swap area on a device or in a file. Step #1: Login as…

Linux启动报错missing operating system

用UltraISO制作了一个Red Hat Enterprise Linux Server release 5.7系统的U盘启动盘,然后在一台PC上安装,由于安装过程中在干别的事情,有些选项没有细看.安装完成后,启动系统时报错:missing operating system. 插上U盘,在BIOS里面选择从U盘启动就能正常启动系统,搜索了一些资料后,发现在安装LINUX操作系统过程中,由于使用的是U盘方式安装,引导的grub信息被默认安装到了U盘中(很多时候没有注意到这个),拔除U盘后,启动过…