摘要： C#操作txt文件,进行清空添加操作的例子。代码：//把txt清空FileStream stream = File.Open(Adr,FileMode.OpenOrCreate,FileAccess.Write);stream.Seek(0, SeekOrigin.Begin);stream.SetLength(0);stream.Close();//向txt里面追加信息StreamWriter sw = new StreamWriter(Adr,true,Encoding.GetEncoding("gb2312"));sw.WriteLine(str);sw.Flush( 阅读全文

摘要： CentOS 系统下修改yum本地源：mkdir /mnt/cdrom/cd /etc/yum.repos.d/mv CentOS-Base.repo CentOS-Base.repo.bakvi cdrom.repo[name]name=yumgpgcheck=0enabled=1baseurl=file:///mnt/cdrom/ls /etc/yum.repos.d/cdrom.repo CentOS-Base.repo.bak CentOS-Media.repo加载光盘:mount /dev/cdrom /mnt/cdrom/挂载光盘到 /mnt/cdrom/下执行命令：yum... 阅读全文