#!/bin/bash

release_file=/etc/os-release
logfile=/var/log/updater.log
errorlog=/var/log/updater_errors.log

check_exit_status(){
    if [ $? -ne 0 ]
    then
        echo "An error occured,please check the $errorlog file."
    fi
}

if  grep -q "Arch" $release_file 
then
    sudo pacman -Syu 1>>$logfile 2>>$errorlog
    check_exit_status
fi

if grep -q "Ubuntu" $release_file ||  grep -q "Debian" $release_file 
then
    sudo apt update 1>>$logfile 2>>$errorlog
    check_exit_status
    #默认yes
    sudo apt dist-upgrade -y 1>>$logfile 2>>$errorlog
    check_exit_status
fi

╭─ ~/shellTest                                                              ly@vmmin 22:32:52
╰─❯ cat ./13myscript_cls.sh 
#!/bin/bash

finished=0

while [ $finished -ne 1 ]
do
    echo "What is your favorite Linux distribution?"
    
    echo "1 - Arch"
    echo "2 - CentOS"
    echo "3 - Debian"
    echo "4 - Mint"
    echo "5 - Something else.."
    echo "6 - exit"
    
    read distro;
    case $distro in 
      1) echo "Arch is xxx";;
      2) echo "CentOS is xbxxx";;
      3) echo "Debian is bbbxx";;
      4) echo "Mint is xxxxsss";;
      5) echo "Something els.xxxxx";;
      6) finished=1
         echo "now will exit"
         ;;
      *) echo "you didn't enter an xxxx choice."
    esac
done

echo "Thanks for using this script."

╭─ ~/shellTest                                                              ly@vmmin 22:32:11
╰─❯ ./13myscript_cls.sh   
What is your favorite Linux distribution?
1 - Arch
2 - CentOS
3 - Debian
4 - Mint
5 - Something else..
6 - exit
3
Debian is bbbxx
What is your favorite Linux distribution?
1 - Arch
2 - CentOS
3 - Debian
4 - Mint
5 - Something else..
6 - exit
u
you didn't enter an xxxx choice.
What is your favorite Linux distribution?
1 - Arch
2 - CentOS
3 - Debian
4 - Mint
5 - Something else..
6 - exit
6
now will exit
Thanks for using this script. 

#!/bin/bash

myvar=1
#小于或者等于10
while [ $myvar -le 10 ]
do
    echo $myvar
    myvar=$(( $myvar + 1  ))
    sleep 0.5
done

╭─ ~/shellTest                              ≡ ly@vmmin 12:10:33
╰─❯ ./71myscript_cls.sh 
1
2
3
4
5
6
7
8
9
10

#!/bin/bash

while [ -f ~/testfile ]
do
    echo "As of $(date),the test file exists."
    sleep 5
done

echo "As of $(date), the test ....has gone missing."

ls -l /misc
echo $? #输出2
ls -l ~
echo $? #输出0

#!/bin/bash
#这个例子之前，作者用 sudo apt remove htop 命令把htop删除了
package=htop
sudo apt install $package

echo "The exit code for ....is $?"

#!/bin/bash

package=notexist
sudo apt install $package

echo "The exit code for ....is $?"
#执行后显示
#Reading package lists... Done
#Building dependency tree... Done
#Reading state information... Done
#E: Unable to locate package notexist
#The exit code for ....is 100

#!/bin/bash

package=htop
sudo apt install $package

if [ $? -eq 0 ]
then
    echo "The installation of $package success..."
    echo "new comman here:"
    which $package
else
    echo "$package failed ..."
fi 

mynum=200

#[和]前后都要有空格
if [ $mynum -eq 200 ]
then
    echo "The condition is true."
fi

#!/bin/bash

mynum=200

#[和]前后都要有空格
if [ $mynum -eq 200 ]
then
    echo "The condition is true."
fi

if [ $mynum -eq 300 ]
then
    echo "The variable does not equal 200."
fi

#!/bin/bash

mynum=300

#[和]前后都要有空格
if [ $mynum -eq 200 ]
then
    echo "The condition is true."
else
    echo "The variable does not equal>
fi

nano myscript.sh

#给脚本赋予执行的权限
sudo chmod +x myscript.sh

./myscript.sh

cat myscript.sh

ls
pwd

#!/bin/bash

echo "Hello World!"

echo "My current working directory is:"
#结果中pwd会另取一行跟这里的显式换行没关系， 我猜是echo在最末尾加了\n换行符




pwd

.       - Any Character Except New Line 除了换行符的任意字符
\d      - Digit (0-9) 数字
\D      - Not a Digit (0-9) 非数字
\w      - Word Character (a-z, A-Z, 0-9, _) 单词字符，大小写字母+数字+下划线
\W      - Not a Word Character 非单词字符
\s      - Whitespace (space, tab, newline) 空白字符，空格+tab+换行符
\S      - Not Whitespace (space, tab, newline) 非空白字符

\b      - Word Boundary 边界字符-单词边界
\B      - Not a Word Boundary 非单词边界(没有单词边界)
^       - Beginning of a String
$       - End of a String

[]      - Matches Characters in brackets
[^ ]    - Matches Characters NOT in brackets
|       - Either Or
( )     - Group

Quantifiers:
*       - 0 or More
+       - 1 or More
?       - 0 or One
{3}     - Exact Number
{3,4}   - Range of Numbers (Minimum, Maximum)


#### Sample Regexs ####

[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+

hugo new site blog.source --format yaml
cd blog.source
git init
git submodule add --depth=1 https://github.com/adityatelange/hugo-PaperMod.git themes/PaperMod 
git submodule update --init --recursive # needed when you reclone your repo (submodules may not get cloned automatically) 
git submodule update --remote --merge

{% raw %} 
{
  "classA":"json位置: data\\classes.json",
  "classA":{
    "master":"xiaoLi",
    "number":"05"
  },
  "classB":{
    "master":"aXiang",
    "number":"15"
  },
  "classC":{
    "master":"BaoCeng",
    "number":"20"
  }
}  
{% endraw %} 

{% raw %} 
{{/* layouts\_default\single.html */}}
{{ define "main" }}
     {{ range .Site.Data.classes }}
          master:{{.master}}==number:{{.number}}<br>
     {{end}}
{{end}} 
{% endraw %} 

{% raw %} 
{{/*layouts\partials\header.html*/}}
<h1>{{.Title}}</h1>
<p>{{.Date}}</p> 
{% endraw %} 

{% raw %} 
{{/*layouts\_default\single.html*/}}
{{ define "main" }}
  This is the single template<br>
  {{/* 常见变量 */}}
   title: {{ .Params.title }}<br>
   title: {{   .Title }}<br>
   date: {{ .Date }}<br>
  url: {{ .URL }}<br>
  myvar: {{ .Params.myVar }}<br>
  {{/* 定义变量 */}}
  {{ $myVarname := "aString" }}
  myVarname:{{ $myVarname }}<br>
  <h1 style="color: {{ .Params.color }} ;" >Single Template</h1>
{{ end }}  
{% endraw %} 

{% raw %} 
---
title: "E-title"
date: 2024-12-07T12:43:21+08:00
draft: true
myVar: "myvalue"
color: "red"
---

This is dir3/e.md 
{% endraw %} 

#content/_index
---
title: "_Index" 
---

This is the home page
#content/dir1/_index
---
title: "_Index"
---

This is the landing page for dir1

{% raw %} 
<!--themes\ga-hugo-theme\layouts\_default\list.html-->
<html>

<head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>Document</title>
</head>

<body>
     {{ partial "header" (dict "Kind" .Kind "Template" "List") }}
     {{.Content}}
     {{ range .Pages }}
          <div style="border: 1px solid black; margin:10px; padding:10px; ">
               <div style="font-size:20px;">
                    <a href="{{.URL}}">{{.Title}}</a>
               </div>
               <div style="color:grey; font-size:16px;">{{ dateFormat "Monday, Jan 2, 2006" .Date }}</div>
               <div style="color:grey; font-size:16px;">{{ if .Params.tags }}<strong>Tags:</strong> {{range .Params.tags}}<a href="{{ "/tags/" | relLangURL }}{{ . | urlize }}">{{ . }}</a> {{end}}{{end}}</div>
               <div style="color:grey; font-size:16px;">{{ if .Params.categories }}<strong>Categories:</strong> {{range .Params.categories}}<a href="{{ "/categories/" | relLangURL }}{{ . | urlize }}">{{ . }}</a> {{end}}{{end}}</div>
               <div style="color:grey; font-size:16px;">{{ if .Params.moods }}<strong>Moods:</strong> {{range .Params.moods}}<a href="{{ "/moods/" | relLangURL }}{{ . | urlize }}">{{ . }}</a> {{end}}{{end}}</div>

               <p style="font-size:18px;">{{.Summary}}</p>
          </div>
     {{ end }}
     {{ partial "footer" . }}
</body>
</html> 
{% endraw %}