ubuntu

https://www.cnblogs.com/anyux/protected/p/10140218.html

about pip

提示符显示

[root@localhost sh]# echo $PS1
[\u@\h \W]\$
[root@localhost sh]# export PS1='[\u@\h \w]\$'
[root@localhost /home/sh]#

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apt install -y vim screen wget git bash-completion terminator net-tools unzip

install google-chrome

https://linuxconfig.org/how-to-install-google-chrome-web-browser-on-ubuntu-18-04-bionic-beaver-linux

apt install gdebi-core

wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb

gdebi google-chrome-stable_current_amd64.deb

google-chrome

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open google chrome, display error "unlock " on ubuntu 18.04

1.edit google-chrome

cd /opt/google/chrome

vim google-chrome

#note exec
#exec -a "$0" "$HERE/chrome" "$@" --user-data-dir $HOME
# add 
exec -a "$0" "$HERE/chrome"  "$@" --no-sandbox ""

##################################################

screen 

google-chrome &

C-c-a

open google-chrome on ubuntu

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2.you are using an unsupported command-line flag no sandbox brave

https://stackoverflow.com/questions/32042187/chrome-error-you-are-using-an-unsupported-command-line-flag-ignore-certifcat

cd /opt/google/chrome/
#edit the last line
exec -a "$0" "$HERE/chrome"  "$@" --no-sandbox  --ignore-certifcate-errors""

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3.ubuntu sound too low

Try the PCM settings in alsamixer - Open terminal (Ctrl+Alt+T) and type alsamixer:

You may need to select the sound card with F6 first.

https://askubuntu.com/questions/390734/volume-low-even-at-maximum

Ubuntu：开机自启动脚本

1.独立脚本

1）.编写要执行脚本的sh文件mysetup.sh

#!/bin/sh
### BEGIN INIT INFO
# Provides:          land.sh
# Required-start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the svnd.sh daemon
# Description:       starts svnd.sh using start-stop-daemon
### END INIT INFO
 
#任务脚本
#进入要执行脚本目录
cd /home/cbuav/working/opencv/target_land
#取得root权限，'123456'为密码，不用加引号，'ls'无实际作用
echo 123456|sudo -S ls
#执行脚本./bin/mywork，sudo -S需要加上
sudo -S ./bin/mywork

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注释部分是必须内容，ubuntu 16.04中一定要加上该LSB信息，不然放入启动脚本的时候会报错无法开机启动。

任务脚本中，一般需要用到root权限，取得root权限和实际任务语句最好分开写，有些情况下写在一起不会成功。

2）.将该sh文件移动到/etc/init.d/目录下，并修改权限

cp mysetup.sh /etc/init.d
sudo chmod 755 /etc/init.d/mysetup.sh


 cd /etc/init.d
 sudo update-rc.d mysetup.sh defaults 95

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其中数字95是脚本启动的顺序号，按照自己的需要相应修改即可。在你有多个启动脚本，而它们之间又有先后启动的依赖关系时你就知道这个数字的具体作用了。

4）.卸载启动脚本

cd /etc/init.d
sudo update-rc.d -f mysetup.sh remove

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2.在rc.local文件中添加启动脚本

rc.local脚本是一个ubuntu开机后会自动执行的脚本，我们可以在该脚本内添加命令行指令。该脚本位于/etc/路径下，需要root权限才能修改。
该脚本具体格式如下：

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
 
#任务脚本
#打开mate终端，并在其中运行脚本
mate-terminal -x /home/myname/mysetup.sh
#任务脚本
exit 0

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一定要将命令添加在 exit 0之前

更新18.04源

#中科大源

deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

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sudo apt-get update

sudo apt-get upgrade

阿里源

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

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163源

deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse

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清华源

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

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root登录

默认安装Ubuntu18.04都是不允许以root用户进行登录的，想要以root用户进行登录需要进行一些操作，主要是以下几个步骤： 
第一步：以普通用户登录系统，创建root用户的密码 
在终端输入命令：sudo passwd root 
然后输入你要设置的密码，这样就完成了设置root用户密码的步骤

第二步：修改文件/usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf文件，增加两行： 
greeter-show-manual-login=true 
all-guest=false 
保存

第三步：进入/etc/pam.d目录，修改gdm-autologin和gdm-password文件 
vi gdm-autologin 
注释掉auth required pam_succeed_if.so user != root quiet_success这一行，保存 
vi gdm-password 
注释掉 auth required pam_succeed_if.so user != root quiet_success这一行，保存

第四步：修改/root/.profile文件 
vi /root/.profile 
将文件末尾的mesg n || true这一行修改成tty -s&&mesg n || true， 保存

第五步：重启系统，输入root用户名和密码，登录系统。

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SSS-download

https://github.com/shadowsocks/shadowsocks-qt5/releases

SwitchyOmega

https://github.com/FelisCatus/SwitchyOmega/releases

install wubi

五笔01.https://jingyan.baidu.com/article/4853e1e5b090a31909f7269c.html

sudo apt-get install ibus ibus-table ibus-table-wubi  -y 
ibus-daemon -drx
ibus-setup
input method 添加五笔输入法
打开系统设置中的 Text Entry

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五笔02 https://blog.csdn.net/zhangyingguangails/article/details/72356771

theme like mac

https://github.com/vinceliuice/Sierra-gtk-theme

sudo apt-get install gtk2-engines-murrine gtk2-engines-pixbuf -y 

sudo add-apt-repository ppa:dyatlov-igor/sierra-theme
sudo apt update
sudo apt install sierra-gtk-theme  -y      # point releases
sudo apt install sierra-gtk-theme-git  -y   # git master branch

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https://www.omgubuntu.co.uk/2017/03/make-ubuntu-look-like-mac-5-steps

install unity-tweak-tool

apt-get install unity-tweak-tool

apt install notify-osd -y

!#test

https://askubuntu.com/questions/874820/how-to-resolve-the-errors-that-show-up-when-trying-to-install-unity-tweak-tool

apt install -y gnome-tweak-tool

sudo apt-get purge unity-tweak-tool

sudo apt-get autoremove && sudo apt-get autoclean

sudo apt-get install unity-webapps-common unity-tweak-tool

sudo apt-get install unity-tweak-tool