wake on lan ubuntu

 cf: https://necromuralist.github.io/posts/enabling-wake-on-lan/

1. Use ip a to find ether device, e.g. enp2s0
2. sudo ethtool --change enp3s0 wol g
3. Check with: sudo ethtool enp3s0| grep Wake
   Supports Wake-on: pg
   Wake-on: g
4. If Wake-on: d then it does not work. It should be Wake-on: g.
   

 

grub command line boot windows 10

 

insmod part_gpt
insmod chain
set root=(hd0,gpt1)
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
boot

Single click desktop icons

Open nemo, 編輯 -> 偏好設定 -> 行為 -> 單擊以開啟項目

Octave plot and print with latex code

#Maybe need to do this first:
#sudo ln -s /usr/bin/latex /usr/local/bin

x = 1:10;
plot (x, x.^2)
title ("$x^2$", "interpreter", "latex")
print -svgconvert 'test_latex.pdf'

Set mail.au.edu.tw as email server

 The username should be au4051 or au4051@mail.au.edu rather than chiao@mail.au.edu.tw.

drupal smtp server settings

 

Setup calendar for thunderbird

 

firefox desktop icon

 /snap/firefox/current/default256.png

dynamic wallpaper background

1. sudo apt install mcron
2. Create a script, say /home/chiao/scripts/dynwall:
   #!/bin/bash
   sleep 3
   IMG=`find  /home/chiao/圖片/wallpaper/dawn/*.jpg | shuf -n 1`
   gsettings set org.gnome.desktop.background picture-options 'stretched'
   /usr/bin/gsettings set org.gnome.desktop.background picture-uri file:///${IMG}
3. Create /home/chiao/.config/cron/job.vixie
   5 * * * * /home/chiao/scripts/dynwall
   
4. Create /home/chiao/.config/autostart/mcron.desktop
   [Desktop Entry]
   Type=Application
   Exec=/usr/bin/mcron -d
   Hidden=false
   NoDisplay=false
   X-GNOME-Autostart-enabled=true
   Name[zh_TW]=mcron
   Name=mcron
   Comment[zh_TW]=
   Comment=
5. Reboot
   

Disable motion service

sudo update-rc.d motion disable
 

Missing figure caption

 While making pdf inside kile for book_chapterxx.tex for my /home/chiao/QuantitativeProgramming/LectureNotes/chapter11/ lecture note. The LaTeX src file exported from Jupyter cannot show the figure title.

 To fix this: comment out (put %) the 36th and 37th lines in book_chapter11.tex, e.g.

 %\DeclareCaptionFormat{nocaption}{}
 %\captionsetup{format=nocaption,aboveskip=0pt,belowskip=0pt}

The figure cation shows up now.

Change section number

 Jupyter change section number (Youtube)

Add utf-8 in case of Chinese cannot be read by Python IDLE

Put the lines at the first:

#!/usr/bin/env python
# coding: utf-8

中文節名 section 亂碼

在 hyperref 前加上 unicode option, e.g

 \usepackage[unicode,pdftex]{hyperref}

cf: https://www.twblogs.net/a/5e4f26dcbd9eee101df702ee

Disable Spyder help hover

Tools > Preferences > Completion and linting > Introspection

Deactivate the option: "Enable hover hints"

Boshiamy for ibus cache and restart

1. Use vim to edit liu_LA.txt. DO NOT use kate.
Make sure press tab following the Chinese chars, e.g.
elm     基本矩陣        100 
2. ibus-table-createdb -s liu_LA.txt -n liu_LA.db 
3. sudo cp -f liu_LA.db /usr/share/ibus-table/tables/ 
4. /bin/rm -rf ~/.local/share/ibus-table ~/.config/ibus ~/.cache/ibus ~/.cache/ibus-table
5. Run ibus-setup to delete 嘸蝦米:
6. Then, logout and login (It needs to do this!)







ubuntu 22.04 need php fpm

 Otherwise, the html lines inside php file would have error.

sudo apt install php8.1-fpm

sudo a2enconf php8.1-fpm

sudo systemctl reload apache2

clonezilla to small disk

Expert mode: 

1. select -icds
2. select -k1 (next window)
   

Array and string offset access syntax with curly braces is no longer supported

cd /usr/share/php/Spreadsheet/Excel/Writer/

Edit Parser.php, change all $xxx{yyy} to $xxx[yyy]

Inside vim, search, eq, $col_ss{$i}, using this

/\$.*{.*}

then relplace { and } with [ and ], using 

qqf{r[f}r]

then / -> enter -> @q

cd /usr/share/php

Edit OLE.php, change all $xxx{yyy} to $xxx[yyy]

 矩陣相乘，例如:

 

中間的dot, 就是鍵盤上的小數點，不是 LaTeX 的 \cdot。

叫用 Mathematica  執行，Alt-M Q.

Force win10 bootup check disk

Open cmd with administrator and type

 CHKDSK /f /r /x C:

Reboot win10 would check C:/ drive. 


anacron process time schedule hourly

 Edit /lib/systemd/system/anacron.timer, change the line:

    OnCalendar=*-*-* 02..23:30

It means anacron will process the cron jobs at 2am to 11:30pm only.

LaTeX 中文 chpater 章 編號

\usepackage{titlesec, titletoc}
\usepackage{CJKnumb}
 

\titleformat{\chapter}{\Huge\bfseries}{第\CJKnumber{\thechapter}章}{1em} {}

Matplotlib 顯示中文

 cf: https://mathsyouth.github.io/2019/06/12/macos-matplotlib

1. Run shell command:
fc-list :lang=zh
   to find the fonts pathes, e.g. /usr/share/fonts/truetype/bkai00mp.ttf
2. Follow the python codes below:
   import numpy as np
   import matplotlib.pyplot as plt
   from matplotlib import rcParams
   from matplotlib.font_manager import FontProperties
   rcParams['axes.unicode_minus']=False
   myfont_kai=FontProperties(fname='/usr/share/fonts/truetype/bkai00mp.ttf', size=15)
   myfont_ming=FontProperties(fname='/usr/share/fonts/truetype/arphic-bsmi00lp/bsmi00lp.ttf',size=12)
   x=np.linspace(0,2*np.pi,100)
   plt.plot(x,x)
   plt.title("準則", fontproperties=myfont_kai)
   plt.ylabel("隸屬度", fontproperties=myfont_ming)
   

Install LAMP server

 cf: https://upcloud.com/community/tutorials/installing-lamp-stack-ubuntu/

 

1. sudo apt update
2. sudo apt install apache 
3. sudo systemctl status apache2
4. sudo apt install php7.4 php7.4-mysql php-common php7.4-cli php7.4-json php7.4-common php7.4-opcache libapache2-mod-php7.4
5. sudo systemctl restart apache2
6. sudo apt install mariadb-server mariadb-client
7. sudo systemctl status mariadb
8. sudo mysql_secure_installation
   As you have no root password set for MariaDB you should simply press Enter when prompted, pressing Y on the next question to then set a root password (keep this safe and secure!) With that set, you can press Enter for the remaining questions as the defaults for each of these will help to secure your new installation.

9. mysql_secure_installation
   

   https://mariadb.com/kb/en/mysql_secure_installation/
10. Run mysql_secure_installation
11. cf: https://kpchiaoo.blogspot.com/search?q=mysql
    If can't access mysql as mysql user root from normal user account but can access mysql without mysql root password from ubuntu root accout, then follow the lines below (the parentheses are comments):
    cf: https://askubuntu.com/questions/766334/cant-login-as-mysql-user-root-from-normal-user-account-in-ubuntu-16-04/801950
        (1). su - (get into ubuntu root account)
        (2). mysql -u root (get into mysql, should be no need password)
        (3). select User,host,plugin from mysql.user;
        (4). update mysql.user set plugin = 'mysql_native_password' where User='root';
        (5). select User,host,plugin from mysql.user; (plugin column should be changed)
        (6). SET PASSWORD FOR 'root'@'localhost' = PASSWORD('new password');
    or for mysql 8.0 in ubuntu 20.04
    ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'newpassord' 
        (7). flush privileges;
12. sudo a2enmod userdir
13. sudo a2enmod rewrite
14. sudo vim php7.4.conf Commnent out the following lines:
    #<IfModule mod_userdir.c>
    #    <Directory /home/*/public_html>
    #        php_admin_flag engine Off
    #    </Directory>
    #</IfModule>
     
    
15. sudo apt install phpmyadmin
16. cf: https://stackoverflow.com/questions/42490647/phpmyadmin-installation-error-1045-acces-denied-using-password-no
    $ mysql -u root -p
mysql> create database phpmyadmin;
mysql> create user 'phpmyadmin'@'localhost' identified by 'some_passwd';
mysql> grant all privileges on phpmyadmin.* to 'phpmyadmin'@'localhost'; 
17. cd  /usr/share/phpmyadmin/sql
$ mysql -u phpmyadmin -p phpmyadmin < create_tables.sql
18. Edit /etc/php/7.4/apache2/php.ini
post_max_size = 200M
upload_max_filesize = 200M
19. Edit /etc/apache2/apache2.conf, add the lines:
<Directory /home/chiao/public_html/drupal9/web>
Options FollowSymLinks
AllowOverride AuthConfig FileInfo Indexes Limit Options=All,MultiViews
</Directory>
20. sudo systemctl restart apache2



 

install pear php-pear spreadsheet

1. sudo apt install php-pear
   
2. Goto https://pear.php.net/package/OLE to see what OLE version is now. Say, 1.0.0RC3 (beta) was released on 2017-06-20
3. sudo pear install OLE-1.0.0RC3
4. Goto https://pear.php.net/package/Spreadsheet_Excel_Writer to see what SpreadSheet version is now. Say, 0.9.4 (beta) was released on 2017-05-24
5. sudo pear install Spreadsheet_Excel_Writer-0.9.4
6. Done
   

nmcli set static IP

1. 執行: sudo  nmcli connection show 會出現下列:
   NAME            UUID                                  TYPE      DEVICE
   有線連線 1      7b62be74-2e0d-32e4-a08e-37a47c33d699  ethernet  eth0
   chiao-dlink842  710e0af6-9b51-455d-9b11-aac2091a2c87  wifi      --   
2. 修改為 192.168.1.12 IP, 指令如下:
   sudo nmcli connection modify "有線連線 1" ipv4.addresses 192.168.1.12/24 ipv4.gateway 192.168.1.1 ipv4.gateway 192.168.1.1 ipv4.method manual
3. sudo systemctl restart NetworkManager
   

eth0 ethernet 不受管理

cf: https://superuser.com/questions/1429490/unmanaged-network-manager-in-ubuntu

 

This works for my ubuntu 20.04.3 at pi4.

As root, edit /etc/NetworkManager/NetworkManager.conf to match the following. You can use the command sudo nano /etc/NetworkManager/NetworkManager.conf to do so.

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:gsm,except:type:cdma,except:type:wwan,except:type:ethernet,except:type:vlan

[device]
wifi.scan-rand-mac-address=no

update FAHPShowMembershipForm.php

Edit line 43:

 #        '#prefix' => '<div class=image><img src=/~chiao/drupal9/web/tmp/test_ranking.png>',
        '#prefix' => '<div class=image><img src=tmp/test_ranking.png>',

Line 48:

#        '#prefix' => '<div class=image><img src=/~chiao/drupal9/web/tmp/test.png>',
        '#prefix' => '<div class=image><img src=tmp/test.png>',

Install drupal from scratch

cf: https://www.drupal.org/docs/installing-drupal

1. cd public_html; mkdir drupaldam
   
2. composer create-project drupal/recommended-project drupaldam  && cd drupaldam
3. Enter phpmyadmin;
   (1). create database 'drupaldam' with utf8mb4_general_ci
   
   (2). drupaladmin 指定 drupaldam 資料庫權限:
   
4. cd ~/public_html; sudo chown -R www-data.www-data drupaldam
5. Visit site in browser:
http:kpchiao.sino.tw:8080/~chiao/drupaldam/web/core/install.php
At 資料庫設定:
   
6. Finish the next two pages.
7. cd ~/public_html/drupaldam/web/sites/default; sudo chmod 0400 settings.php; sudo chown -R www-data.www-data settings.php files
   
8. Done.

For drupal having “htaccess: Options not allowed here” error

Edit /etc/apache2/mods-available/userdir.conf, add Options in AllowOveride, namely,

AllowOverride FileInfo AuthConfig Limit Indexes Options