几个命令
取txt文件值 data=read.table(“1.txt”,header=T) 读值 head(data) windows下 获取当前工作目录 getwd() 相对路径 setwd(“.\\Rsourse”) 上一级目录 setwd(“..\\”) 绝对路径 setwd(“D:\\MySpace\\机器学习\\R\\Rsourse”)
取txt文件值 data=read.table(“1.txt”,header=T) 读值 head(data) windows下 获取当前工作目录 getwd() 相对路径 setwd(“.\\Rsourse”) 上一级目录 setwd(“..\\”) 绝对路径 setwd(“D:\\MySpace\\机器学习\\R\\Rsourse”)
假如我们要导入C:\Users\user\Desktop路径下的test.csv文件,则输入代码: read.csv(file = “C:\\Users\\user\\Desktop\\test.csv”) 默认情况下,R语言会认为第一行的是数据的标题,假如你的数据的第一行其实并不是标题,那么可以输入代码: read.csv(file = “C:\\Users\\user\\Desktop\\test.csv”,header = F) 下面的代码会将数据赋给对象Mydata: Mydata<-read.csv(file = “C:\\Users\\user\\Desktop\\test.csv”,header = F) 要查看Mydata对象里的数据,直接输入Mydata就可以了: Mydata 原始txt数据中有a、b两列数据,并且它们以“;”号作为分隔符,则: read.table(file = “C:\\Users\\user\\Desktop\\test.txt”,header = T,sep=”;”) 假如分隔符是其他符号,例如百分号“%”,则代码修改为: read.table(file = “C:\\Users\\user\\Desktop\\test.txt”,header = T,sep=”%”)
1、更新系统 sudo apt update 2、安装apache2和php5 sudo apt install apache2 如果出现路径锁定问题,使用以下命令 sudo rm /var/lib/dpkg/lock sudo rm /var/lib/apt/lists/lock sudo rm /var/cache/apt/archives/lock 3、安装postfix sudo apt install postfix 点OK确认,configuration选择默认的项:Internet Site,system mail name默认计算机名 4、重新载入postfix服务 sudo service postfix restart 5、安装dovecot sudo apt install dovecot-imapd dovecot-pop3d 6、重新载入dovecot服务 sudo service dovecot restart 7、安装squirrelmail sudo apt install squirrelmail 8、设置squirrelmail …
关于Apache2的几个修改 1、修改端口 vim /etc/apache2/ports.conf 修改Listen 3333 vim /etc/apache2/sites-enabled/000-default.conf 修改第一行<VirtualHost *:3333> 重启服务 2、修改默认路径 vim /etc/apache2/apache2.conf 往下翻页,添加 <Directory /home/user/web> Options Indexes FollowSymLinks AllowOverride None Require all granted </Directory> vim /etc/apache2/sites-enabled/000-default.conf 更改 DocumentRoot /home/user/web 重启服务 3、修改默认路径到用户目录,并给予修改权限 mkdir /home/user/web vim /etc/apache2/envvars 更改apache用户与组 export APACHE_RUN_USER=www-data export APACHE_RUN_GROUP=www-data 修改为: export APACHE_RUN_USER=user export APACHE_RUN_GROUP=user (与你系统的用户同名,避免Apache2 写入权限的问题) 重启服务
Your web server is not properly set up to resolve “/.well-known/caldav”. _ Your web server is not properly set up to resolve “/.well-known/carddav”. add Redirect 301 /.well-known/carddav https://domain.com/nextcloud/remote.php/dav Redirect 301 /.well-known/caldav https://domain.com/nextcloud/remote.php/dav to nextcloud.conf Alias /nextcloud “/var/www/nextcloud/” <Directory /var/www/nextcloud/> Options +FollowSymlinks AllowOverride All <IfModule mod_dav.c> Dav off </IfModule> SetEnv HOME …
Apache默认在当前目录下没有index.html入口就会显示网站根目录,让网站目录文件都暴露在外面,是一件非常危险的事,例如:数据库密码泄露,隐藏页面暴露等严重安全问题! 进入apache的配置文件 $ sudo vi /etc/apache2/apache2.conf #Debian/Ubuntu systems $ sudo vi /etc/httpd/conf/httpd.conf #RHEL/CentOS systems Options Indexes FollowSymLinks 修改为: Options FollowSymLinks 修改后结果如下: <Directory “/var/www/html”> # Options None # Options Indexes FollowSymLinks Options FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> 其实就是将Indexes去掉,Indexes表示若当前目录没有index.html就会显示目录结构。 重启Apache服务器 /etc/init.d/httpd restart https://blog.csdn.net/ithomer/article/details/50487296
To hide web server version number, server operating system details, installed Apache modules and more, open your Apache web server configuration file using your favorite editor: $ sudo vi /etc/apache2/apache2.conf #Debian/Ubuntu systems $ sudo vi /etc/httpd/conf/httpd.conf #RHEL/CentOS systems And add/modify/append the lines below: ServerTokens Prod ServerSignature Off Save the file, …
<script type=”text/javascript”> var userAgent = navigator.userAgent.toLowerCase(); var platform; if(userAgent == null || userAgent == ”){ platform = ‘WEB’ ; }else{ if(userAgent.indexOf(“android”) != -1 ){ platform = ‘ANDROID’; location.href = “http://m.kuegou.com/”; }else if(userAgent.indexOf(“ios”) != -1 || userAgent.indexOf(“iphone”) != -1 || userAgent.indexOf(“ipad”) != -1){ platform = ‘IOS’; location.href = “http://m.kuegou.com/”; }else if(userAgent.indexOf(“windows …
<meta name=”viewport” content=”width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0″> https://segmentfault.com/a/1190000008517628
新系统无无线网卡驱动 安装 无线网管理工具wicd sudo apt install wicd-gtk 关掉netmanager .并启动wicd /etc/init.d/wicd restart service NetworkManager restart sudo -S service NetworkManager restart