如何居中一个浮动元素?
设置容器的浮动方式为绝对定位
然后确定容器的宽高 比如宽500 高 300 的层
然后设置层的外边距
Div {
width:500px ;
height:300px;
margin: -150px 0 0 -250px;
position: absolute;
left:50%;
top:50%;
background-color: #000;
}
FreeBSD安装Pure-FTPd及user manager for PureFTPd
1、首先安装需要配置好apache2/mysql/php等服务！前面有过笔记。 2、安装pure-ftpd cd /usr/ports/ftp/pure-ftpd/ make with_language=simplified-chinese install clean;rehash 安装时，会有选择项；勾选： MYSQL Support for users in mysql database PRIVSEP Enable privileges separation PERUSERLIMITS Per-user concurrency limits THROTTLING Bandwidth throttling BANNER Show pure-ftpd welcome upon session start UTF8 Support for charset conversion (expreimental) 安装完成后 添加pureftpd_enable=”YES”到/etc/rc.conf文件中。 3、创建MySQL数据库，登陆mysql INSERT INTO mysql.user (Host, User, Password, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv, Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, ssl_cipher, x509_issuer, x509_subject) VALUES(‘localhost’,’ftp’,PASSWORD(‘tmppasswd’),’Y’,’Y’,’Y’,’Y’,’N’,’N’,’N’,’N’,’N’,’N’,’N...
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