Dxb blogs and website

Shell 脚本

Sat, 03 Aug 2019 00:00:00 +0000

好用的shell工具脚本!

日常积累小脚本 dxb/shell/参考（不积跬步，无以至千里；不积小流，无以成江海.水滴石穿；不以恶小而为之，不以善小而不为之；冰冻三尺，非一日之寒）

你可以对此进行参照!

下列为测试的shell脚本：

我们可以通过ping命令测试192.168.0.2到192.168.0.254之间的所有主机是否在线:

---
#!/bin/bash
for i in `seq 2 254`
do
    ping -c1 -w1 192.168.0.$i > /dev/null 2>&1
    #-c可以指定ping的次数，-w测试的时间 -w 1就是1秒中无论成功失败都结束
    #-c -w后面都要输入参数所以都要带上l
    #$?代表最后命令退出状态，0代表没错，其他代表有错
    [ $? -eq 0 ] && echo "192.168.0.$i IP is UP!" || echo "192.168.0.$i IP is down!"
done
---

1.在linux下会写shell脚本是非常重要的，下面我参照例子给大家展示几个脚本，顺带这学习shell 的语法：什么时候helloworld是必不可少的，第一个脚本肯定与helloworld是离不开的：

---
#!/bin/sh
a="hello world!"
num=2
echo "a is : $a num is : ${num}nd"

运行结果： a is : hello world! num is : 2nd
---

2.下面带着大家学学if语句：先抛出一个问题：写一个脚本，判断当前所用的shell

---
#!/bin/sh
#注意if的空格以及[]里面的空格这里错了半天啊
if [ "$SHELL" = "/bin/bash" ];then
echo "your login shell is the bash \n"
echo "SHELL is : $SHELL"
else 
echo "your login shell is not bash but $SHELL"
fi
#[ -f "somefile" ] : 判断是否是一个文件
#[ -x "/bin/ls" ] : 判断/bin/ls是否存在并有可执行权限
#{ -n "$var" } : 判断$var变量是否有值
#[ "&a" = "$b" ] : 判断$a和$b是否相等
[ -f "/etc/shadow" ] && echo "This computer uses shadow passwords"
if [ -f "/etc/shadow" ];then
echo "电脑密码使用隐藏字符"
else
echo "并没有"
fi
---

3.为了让大家更加熟练的运用shell，那么练习下吧，问题：写一个脚本使其从一个文件里面读入有echo的语句，并把其写在本文件末尾;

---
#!/bin/sh
#-r代表此文件是否可读，具体见man test
mailfolder=/home/handsome/work/linux_learn/shell_learn/readme.txt
#[ -r "$mailfolder" ] || { echo "Can not read $mailfolder" ; exit 1;}
#echo "$mailfolder has mail from : "
#grep "^echo " $mailfolder

if [ -r "$mailfolder" ];then
    echo "$mailfolder has massage from : "
    echo | grep '^echo ' $mailfolder >> readme2.txt
    chmod +r readme2.txt
    cat readme2.txt >> $mailfolder
    rm -f readme2.txt
else
    echo "Can not read $mailfolder"
    touch $mailfolder
    chmod +rw $mailfolder
    echo "echo 人生自古谁无死，六区蛋清找旱情! " >> $mailfolder
fi
---

4.接下来，我们练习下while的用法，老规矩具体问题来分析; 问题：写一个脚本（不建议使用for变量–for是根据空格取值） 1.设定变量FILE的值为/etc/passwd 2.依次向/etc/passwd中的每个用户问好，并且说出对方的ID什么（Hello,root，your UID is0.） 3.统计一个有多少个用户

---
#!/bin/bash
fl=/etc/passwd
count=`cat $fl | wc -l`
#下面是一个管道，下面循环读文件中的每一行
cat $fl |
while read line
do
    user=`echo $line|awk -F ':' '{print $1}'`
    #代表以 ：分段$1就是取第1段
    uid=`echo $line|awk -F ':' '{print $3}'`
    echo "hello, $user Your UID is $uid"
done
echo "====User_count:$count===="
#前面求得的用户数
---

5.练习一下for语句吧问题：写个脚本; 1.切换工作目录至/tmp 2.依次向/tmp目录中的每个文件或子目录问好（Hello,log） 3.统计/tmp目录下共有多个文件，并显示出来

---
#!/bin/bash
cd /tmp
for i in /tmp/*
do
    echo "Hello , $i"
done
count=`ls -l|grep '^-'|wc -l`
echo "====file_count:$count===="
---

6.那么问题来了： question：传递两个整数给脚本，让脚本分别计算并显示这两个整数的和，差，积，商

---
#!/bin/bash
a=$1
b=$2
[ -z $a ] && echo "please \$1 number1" && exit 1
[ -z $b ] && echo "please \$2 number2" && exit 2
[ ! $# -eq 2 ] && echo "--please num1 num2" && exit 3
# $#传递到脚本的参数个数
# -eq相当于=, -ne相当于不等于， -ge >= , -gt >, -le <=, -lt <
echo "$a + $b = $(($a+$b))"
echo "$a - $b = $(($a - $b))"
echo "$a * $b = $(($a*$b))"
echo "$a / $b = $(($a/$b))"
---

7.写一个脚本;求1到100的和？

---
#!/bin/bash
sum=0
i=1
while [ $i -le 100 ]
do
    sum=$(($sum + $i))
    i=$(($i+1))
done
echo "$sum"
---

好用的办公小软件

Sat, 27 Jul 2019 00:00:00 +0000

日常办公绿色好用小软件.

简单分享.

小软件列表：

FastStone Capture 截图录屏软件，可截图可录屏，还有绿色版，比市场上录屏软件靠谱多了，而且不收费；
notepad++ 文档编辑器，简单易用，比系统自带的txt编辑器好用一些；
Everything 快速搜索 ,基于名称快速定位文件和文件夹。
UltraEdit 文档编辑器，功能强大，不过需要注册码，稍微麻烦一些；
windows lodaer windows系统激活工具，简单好用
pointofix 电脑屏幕画笔工具，可支持汉语（默认en可支持多种语言，需下载语言包）
SecureCRT ssh\telnet工具，putty简单易用
UltraISO 一款功能强大而又方便实用的光盘映像文件制作/编辑/转换工具，它可以直接编辑ISO文件和从ISO中提取文件和目录，也可以从CD-ROM制作光盘映像或者将硬盘上的文件制作成ISO文件。同时，你也可以处理ISO文件的启动信息
SecureCRT ssh\telnet工具，putty简单易用
PL/SQL oracle数据库管理工具
xmanger linux系统远程工具
VNC linux远程工具
RDO windows远程工具
vdbench 数据压测工具
dstat 是一个可以取代vmstat,iostat,netstat和ifstat这些命令的多功能产品
墨墨记单词手机app
CCtalk 电脑学习app
蜻蜓FM 手机FM播音软件
喜马拉雅FM

混沌初开

Sun, 07 Jul 2019 00:00:00 +0000

文学不仅仅是世界的镜子，它塑造世界的力量胜过千军万马.

时间，是最霸道、最具说服力的。它无需向任何人知会，就把风雨磨难强加给我们。又自作主张地收起，抛给我们一天彩虹或阴云。但也教会我们认清一些无法辨明的人事，不再坚持和固执.

生命中总会有无数个擦肩而过，不是每个相遇都能凝结成相守，不是每个相邀都能转化成相知。一辈子那么长，生活中变数那么多。幸好我们总保有一点对于永远的奢望，不至于错过下一次爱情来的时候.

未来皆有彼岸
你是蓝白之间
你值得所有美好
今天的晚霞浪漫了这一整片海

高三的时候，天刚亮就出门，觉得莫名委屈和辛苦，全世界都在睡觉而我要起来拼命。但其实不是，以出门就能看到金黄色的阳光，还有鸟叫声，呼吸新鲜空气，有目标和盼头推着时间向前，真的怀念.

来，转身！给你变个…夕阳！

暗夜来临前的黯淡暮色，也是地球另一端冉冉升起的黎明朝阳，这世界的每一秒钟里，永远都有人在等着同一道光.

出发是归途，到达也是离开，有些人重逢，有些人道别，早安晚安也都在同一时间

骆驼迷恋大海，海鸥贪恋沙漠，所有自然规律里，可能的不可能，所有无能为力的，可望而不可及.

希望所有离开的，都在以另一种方式存在.

那些曾经以为的圆满结局，到后来连告别都太匆忙.

那些不知名的花一直在为你绽放.

快要到站缓慢减速的列车，快要说再见的又一个夏天。

Sample post

Sat, 06 Jul 2019 00:00:00 +0000

Consectetur adipiscing elit. Donec a diam lectus. Sed sit amet ipsum mauris. Maecenas congue ligula ac quam viverra nec consectetur ante hendrerit. Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean ut gravida lorem.

Consectetur adipiscing elit
Donec a diam lectus
Sed sit amet ipsum mauris

Ut turpis felis, pulvinar a semper sed, adipiscing id dolor. Pellentesque auctor nisi id magna consequat sagittis. Curabitur dapibus enim sit amet elit pharetra tincidunt feugiat nisl imperdiet. Ut convallis libero in urna ultrices accumsan. Donec sed odio eros. Donec viverra mi quis quam pulvinar at malesuada arcu rhoncus. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. In rutrum accumsan ultricies. Mauris vitae nisi at sem facilisis semper ac in est.

Nunc diam velit, adipiscing ut tristique vitae, sagittis vel odio. Maecenas convallis ullamcorper ultricies. Curabitur ornare, ligula semper consectetur sagittis, nisi diam iaculis velit, id fringilla sem nunc vel mi. Nam dictum, odio nec pretium volutpat, arcu ante placerat erat, non tristique elit urna et turpis. Quisque mi metus, ornare sit amet fermentum et, tincidunt et orci. Fusce eget orci a orci congue vestibulum.

Ut dolor diam, elementum et vestibulum eu, porttitor vel elit. Curabitur venenatis pulvinar tellus gravida ornare. Sed et erat faucibus nunc euismod ultricies ut id justo. Nullam cursus suscipit nisi, et ultrices justo sodales nec. Fusce venenatis facilisis lectus ac semper. Aliquam at massa ipsum. Quisque bibendum purus convallis nulla ultrices ultricies. Nullam aliquam, mi eu aliquam tincidunt, purus velit laoreet tortor, viverra pretium nisi quam vitae mi. Fusce vel volutpat elit. Nam sagittis nisi dui.

Suspendisse lectus leo, consectetur in tempor sit amet, placerat quis neque

Etiam luctus porttitor lorem, sed suscipit est rutrum non. Curabitur lobortis nisl a enim congue semper. Aenean commodo ultrices imperdiet. Vestibulum ut justo vel sapien venenatis tincidunt.

Phasellus eget dolor sit amet ipsum dapibus condimentum vitae quis lectus. Aliquam ut massa in turpis dapibus convallis. Praesent elit lacus, vestibulum at malesuada et, ornare et est. Ut augue nunc, sodales ut euismod non, adipiscing vitae orci. Mauris ut placerat justo. Mauris in ultricies enim. Quisque nec est eleifend nulla ultrices egestas quis ut quam. Donec sollicitudin lectus a mauris pulvinar id aliquam urna cursus. Cras quis ligula sem, vel elementum mi. Phasellus non ullamcorper urna.

Color Post

Sat, 18 May 2019 00:00:00 +0000

What a colorful post!

This is an idea that came from xukimseven/HardCandy-Jekyll looking at this cheerful and colorful them, I wanted to enable something similar for mine.

You can go fork and star hers too! 😉

How does it work?

Basically you need to add just one thing, the color:

---
layout: post
title: Color Post
color: brown
---

It can either be a html color like brown (which look like red to me). Or with the rgb:

---
layout: post
title: Color Post
color: rgb(165,42,42)
---

The background used is lineart.png from xukimseven you can edit it in the config file. If you want another one, put it in /assets/img as well.

⚠️ It’s a bit hacking the css in the post.html

Feature images

Sat, 29 Nov 2014 00:00:00 +0000

This is an example of a post which includes a feature image specified in the front matter of the post. The feature image spans the full-width of the page, and is shown with the title on permalink pages.

Markdown and HTML

Fri, 28 Nov 2014 00:00:00 +0000

Jekyll supports the use of Markdown with inline HTML tags which makes it easier to quickly write posts with Jekyll, without having to worry too much about text formatting. A sample of the formatting follows.

Tables have also been extended from Markdown:

First Header	Second Header
Content Cell	Content Cell
Content Cell	Content Cell

Here’s an example of an image, which is included using Markdown:

Highlighting for code in Jekyll is done using Base16 or Rouge. This theme makes use of Rouge by default.

// count to ten
for (var i = 1; i <= 10; i++) {
    console.log(i);
}

// count to twenty
var j = 0;
while (j < 20) {
    j++;
    console.log(j);
}

Type on Strap uses KaTeX to display maths. Equations such as $S_n = a \times \frac{1-r^n}{1-r}$ can be displayed inline.

Alternatively, they can be shown on a new line:

$f(x) = \int \frac{2x^2+4x+6}{x-2}$

What's your title

Thu, 27 Nov 2014 00:00:00 +0000

This is an example of a post which includes a feature image that has a text, where you don’t want to redisplay the title. We cannot simply set the title to the empty string, as that would break pages that list this post, such as home and tags.

Markup: Syntax Highlighting

Fri, 08 Aug 2014 00:00:00 +0000

From Michael’s Rose Minimal Mistakes. Syntax highlighting is a feature that displays source code, in different colors and fonts according to the category of terms. This feature facilitates writing in a structured language such as a programming language or a markup language as both structures and syntax errors are visually distinct. Highlighting does not affect the meaning of the text itself; it is intended only for human readers.

GFM Code Blocks

GitHub Flavored Markdown fenced code blocks are supported. To modify styling and highlight colors edit /_sass/syntax.scss.

#container {
  float: left;
  margin: 0 -240px 0 0;
  width: 100%;
}

1
2
3
4
5
6
7
.highlight {
  margin: 0;
  padding: 1em;
  font-family: $monospace;
  font-size: $type-size-7;
  line-height: 1.8;
}

<nav class="pagination" role="navigation">
  {% if page.previous %}
    <a href="{{ site.url }}{{ page.previous.url }}" class="btn" title="{{ page.previous.title }}">Previous article</a>
  {% endif %}
  {% if page.next %}
    <a href="{{ site.url }}{{ page.next.url }}" class="btn" title="{{ page.next.title }}">Next article</a>
  {% endif %}
</nav><!-- /.pagination -->

module Jekyll
  class TagIndex < Page
    def initialize(site, base, dir, tag)
      @site = site
      @base = base
      @dir = dir
      @name = 'index.html'
      self.process(@name)
      self.read_yaml(File.join(base, '_layouts'), 'tag_index.html')
      self.data['tag'] = tag
      tag_title_prefix = site.config['tag_title_prefix'] || 'Tagged: '
      tag_title_suffix = site.config['tag_title_suffix'] || '&#8211;'
      self.data['title'] = "#{tag_title_prefix}#{tag}"
      self.data['description'] = "An archive of posts tagged #{tag}."
    end
  end
end

Code Blocks in Lists

Indentation matters. Be sure the indent of the code block aligns with the first non-space character after the list item marker (e.g., 1.). Usually this will mean indenting 3 spaces instead of 4.

Do step 1.

Now do this:

def print_hi(name)
  puts "Hi, #{name}"
end
print_hi('Tom')
#=> prints 'Hi, Tom' to STDOUT.

Now you can do this.

GitHub Gist Embed

An example of a Gist embed below.

Source

Generate a table of content

Thu, 12 Dec 2013 00:00:00 +0000

Test article, get the source on github.

Using Kramdown GFM

Using Kramdown GFM
- Basic Usage
Using toc.js

Basic Usage

You need to put this at the beginning of the page where you want the table of content to be displayed

* TOC
{:toc}

It will then render the markdown and html titles (lines that begins with # or using the <h1></h1> tages)

Using toc.js

Demo display of jekyll-table-of-contents by ghiculescu.

Customize with toc.js

toc.js stands for table of content, it is a js plugin that generates automatically a table of content of a post.

Use with this jekyll template

If you want to customize the theme it is up to you, you can add the toc.js file into the asset > js and add it into the page.html layout with:

<script src="/assets/js/toc.js" ></script>

Then you can use it as it is said on the repository.

Basic Usage

The script requires jQuery. First, reference toc.js in templates where you would like to add the table of content. Then, create an HTML element wherever you want your table of contents to appear:

<div id="toc"></div>

Then you put your post with titles and all like:

## Title
## Mid title 1
This is text on page one
## Mid title 2
This is text for page two
### Sub title 2.a
Some more text

Then at the end of your post, you call the .toc() function using:

<script type="text/javascript">
$(document).ready(function() {
    $('#toc').toc();
});
</script>

How it would look like

Blogging with title

Mon, 18 Nov 2013 00:00:00 +0000

I am a BIG title

This is a very tiny tiny post with less than 250 letters.

Search should be working even for complicated escape symbols

sed -i 's/\"hostname\"\:.*$/\"hostname\"\: \"'$IPADDR'\"\,/g' open-falcon/agent/config/cfg.json