记录ubuntu下各种注意事项及常用命令
1,发热：因为硬件厂商对linux类系统的支持不足，驱动不会自动安装，所以要自己装。。。
http://www.linuxidc.com/Linux/2015-04/116450.htm
2,装上chrome后删掉firefox，su后用synaptic装 ，装软件和删软件都科研
习惯装上adblock,fireshot,getthemall三个插件
http://jingyan.baidu.com/article/335530da98061b19cb41c31d.html
3,github上找个lantern
3,双系统切换问题：我是装的win7 + ubuntu16.04 双系统，然而可能发生ubuntu把win7的mbr干掉了
的情况，回不了win7，所以必须处理这个问题
https://forum.ubuntu.org.cn/viewtopic.php?f=139&t=442830
你可以进入ubuntu 那么太好了，你只需要增加一段自动搜索的代码就可以了 代码:
sudo gedit /etc/grub.d/40_custom 在文档最下面增加： 代码:
menuentry '搜索并启动windows7' {
recordfail
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ntfs
search --no-floppy --file --set=root /bootmgr
ntldr /bootmgr
} 如果你已经知道bootmgr在第一分区（隐藏分区）
也可以这样写
代码:
menuentry '启动windows7' {
recordfail
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ntfs
set root=(hd0,msdos1)
ntldr /bootmgr
} 最后
代码:
sudo update-grub 重启选择新菜单进入
回到win7后可用easybcd修复一下
4,
软件安装命令：sudo apt-get install softname
然而很多时候“源”不对，就会说定位不到这个软件，查找不到这个软件之类的，解决方式就是换“源”，“源”这个东西就是软件中心的地址，网络上有各种各样的可提供软件下载的网络中心，
源的地址可以通过：gedit /etc/apt/sources.list 来修改
提示没有权限修改，就su到root下修改
#163 deb http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
##测试版源
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse
# 源码
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
##测试版源
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse #
deb http://ppa.launchpad.net/v-launchpad-jochen-sprickerhof-de/pcl/ubuntu trusty main
deb-src http://ppa.launchpad.net/v-launchpad-jochen-sprickerhof-de/pcl/ubuntu trusty main #
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security multiverse #
deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse #
# Canonical 合作伙伴和附加
deb http://archive.canonical.com/ubuntu/ xenial partner
deb http://extras.ubuntu.com/ubuntu/ xenial main #
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-updates main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-proposed main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-backports main restricted universe multiverse
5, 输入pwd，显示当前工作目录
6, dpkg -i soft_deb 命令可以安装deb包
7, make -j4 开启4个线程make软件，之后记得sudo make install
8, 删除软件，清理垃圾
sudo apt-get purge softwarename
sudo apt-get autoremove
sudo apt-get clean
sudo apt-get autoclean
9, 装pcl的ppa命令，然而并没什么卵用
sudo add-apt-repository ppa:v-launchpad-jochen-sprickerhof-de/pcl
sudo apt-get update
sudo apt-get install libpcl-all
10, su后 rm -rf anything
删除各种文件，可以用通配符
sudo apt-get -f install