###Linux命令
- netstat -s 输出当前关于网络的统计值
- Shell中：export PATH=$PATH:/some/directory 修改终端的环境变量
- /etc/profile加上这句export PATH=$PATH:/path1:/path2:/pahtn
- source ./etc/profile 修改系统环境变量
- tar -xf xxx.tar.bz2 解压缩
- ln -s f1 f2 创建f1的软链接到f2,没有-s参数时硬链接
- & 后台执行进程
- cp 复制文件/文件夹，如果目的地文件存在则覆盖，文件夹存在则复制到目录下
- cp [-R] file1 file2
- mv 移动/重命名文件
- mv [-f][-i] file1 file -i表示覆盖前提示,-f表示不提示
- rm 删除文件
- rm [-f][-i][-R] file 参数含义同mv
- apt-get
- install xxx
- remove xxx
- 下载的文件在/var/cache/apt/archives
- dpkg -i[-r] package.deb 安装和反安装
- ls 文件显示
- a 显示全部
- R 递归的显示子文件夹
- s 文件大小一同显示,以'块'为单位
- t 以修改的时间戳排序
- l 详细列表显示
- type gcc 显示gcc命令所在的目录
- locate xxx 查找包含xxx的文件,新文件未被加入数据库的,找不到
- find [文件或目录] [选项]
- find / -name 'filename'
- -prune 控制不递归查找
- df 查看磁盘信息 -h显示的信息相对清晰一些
- cmp file1 file2 比较两个文件,相同时没有返回,不同时返回第一个不同的行
###换源
- 备份原文件 sudo cp /etc/apt/sources.list /etc/apt/sources.list.old
- 修改,覆盖/添加新的源地址 sudo vim /etc/apt/sources.list
- 保存后，更新 sudo apt-get update 备选的源: Ubuntu 官方更新服务器（欧洲，此为官方源，国内较慢，但无同步延迟问题，电信、移动/铁通、联通等公网用户可以使用)： deb http://archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ quantal-proposed main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ quantal-proposed main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse 网易163更新服务器（广东广州电信/联通千兆双线接入），包含其他开源镜像： deb http://mirrors.163.com/ubuntu/ quantal main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ quantal main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ quantal-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ quantal-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ quantal-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ quantal-backports main restricted universe multiverse #中科大 deb http://debian.ustc.edu.cn/ubuntu/ quantal main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ quantal main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe
ubuntu配置android环境
- 官网下载ADT组件
- 百度网盘下载SDK，目前所知只需要两部分就可以了：platforms/android-;/system-images/android-，复制到ADT解压缩后的SDK目录下
- 安装32位库 libstdc++.so.6错误 安装libstdc++6和lib32stdc++6 解决32位库的方法 sudo apt-get install -y libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5 lib32z1
- 启动虚拟机如果发现没有键盘的话可能是failed to load libgl.so错误 $ sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386 libgl1-mesa-dev g++-multilib mingw32 openjdk-6-jdk tofrodos python-markdown libxml2-utils xsltproc zlib1g-dev:i386 $ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so 链接前记得修改源文件的权限