#File System
List Blocks
`lsblk`
System Memory details
`free -m`
Make test data files
https://www.skorks.com/2010/03/how-to-quickly-generate-a-large-file-on-the-command-line-with-linux/
`dd if=/dev/urandom of=file.txt bs=2048 count=10`
#Required
Para que un camo sea requerido debe integrar required="true"
#Messages
Este elemento va con el requided
```
<h:messages for="nombredel elemento"/>
```
#Validator
inputText tiene un metodo de validator
```
validator="#{personaBeans.Validator}"
```
#form
siempre que se quiera realizar una peticion al servidor debe de estar dentro de etiquetas form
```
<h:form>
</h:form>
```
#dataTable
Se pone un alias para acceder a los atributos de la lista var="per"
```
<h:dataTable value="#{personaBean.Listpersona}" var="per">
<h:column>
<h:outputLable value="{per.nombre}">
</h:column>
</h:dataTable>
```
The main lessons I learnt:
Loading a JSON file into a variable makes things easier. By this I can already apply conditions (display only those with “permissionPub” = “yes”)
first and last can be easily applied as function to a range sort command. In the first post this would already have been possible in line 2 but then the condition wasn’t working as I wanted
~~~
{{ $json := getJSON "data/signatures/signatures.json" }}
{{ $json := where $json "permissionPub" "yes" }}
{{ range sort $json "timestamp" "desc" | first 10 }}
<tr>
<td>{{ .name }}</td>
</tr>
{{ end }}
{{ $json := getJSON "data/signatures/signatures.json" }}
{{ $json := where $json "permissionPub" "yes" }}
{{ range sort $json "timestamp" "desc" | first 10 }}
<tr>
<td>{{ .name }}</td>
</tr>
{{ end }}
~~~
Features
===
**[English version](/features)**
**[中文版](/CwYwhgzAbApgHFAtHAnAIzY4awBNkwCsA7ImFCBCHAIxwBMhhIQAAA==)**
**[日本語版](/GwMxE4HYA4EMBMC0BTcwBMiAs94FZFpktZFIQ91pp1xwAjdPIA==)**
**Do not modify this note.** Thank you very much :smile:
**If you want to say hello or play with something, please go to [Playground](/CwDgDAZgTFCcCmBaAhvAJgVkceA2AzIgEYDGIJiIGIU8GYRYJA7PkAAA)**
Introduction
===
<i class="fa fa-file-text"></i> **HackMD** is a realtime, multiplatform collaborative markdown note editor.
This means that you can write notes with other people on your **desktop**, **tablet** or even on the **phone**.
You can sign-in via **Facebook**, **Twitter**, **GitHub**, or **Dropbox** in the [_homepage_](/).
Note that this service is still in an early stage, and thus still has some [_issues_](https://github.com/hackmdio/hackmd/issues?q=is%3Aopen+is%3Aissue+label%3Abug).
Please report new issues in [GitHub](https://github.com/hackmdio/hackmd/issues/new).
If you need instant help, please send us a [Facebook message](https://www.messenger.com/t/hackmdio).
**Thank you very much!**
Workspace
===
## Modes
**Desktop & Tablet**
<i class="fa fa-edit fa-fw"></i> Edit: See only the editor.
<i class="fa fa-eye fa-fw"></i> View: See only the result.
<i class="fa fa-columns fa-fw"></i> Both: See both in split view.
**Mobile**
<i class="fa fa-toggle-on fa-fw"></i> View: See only the result.
<i class="fa fa-toggle-off fa-fw"></i> Edit: See only the editor.
## Image Upload:
You can upload an image simply by clicking on the camera button <i class="fa fa-camera"></i>.
Alternatively, you can **drag-n-drop** an image into the editor. Even **pasting** images is possible!
This will automatically upload the image to **[imgur](http://imgur.com)**, nothing to worry. :tada:
## Share Notes:
If you want to share an **editable** note, just copy the URL.
If you want to share a **read-only** note, simply press publish button <i class="fa fa-share-square-o"></i> and copy the URL.
## Save a Note:
Currently, you can save to **Dropbox** <i class="fa fa-dropbox"></i> or save an `.md` file <i class="fa fa-file-text"></i> locally.
## Import Notes:
Similarly to the _save_ feature, you can also import an `.md` file from **Dropbox** <i class="fa fa-dropbox"></i>,
or import content from your **clipboard** <i class="fa fa-clipboard"></i>, and that can parse some **html** which might be useful :smiley:
## Permissions:
It is possible to change the access permission to a note through the little button on the top right of the view.
There are six possible options:
<i class="fa fa-leaf fa-fw"></i> **Freely**: Anyone can edit this note.
<i class="fa fa-pencil fa-fw"></i> **Editable**: A signed-in user can edit this note.
<i class="fa fa-id-card fa-fw"></i> **Limited**: People have to sign-in to view and edit this note.
<i class="fa fa-lock fa-fw"></i> **Locked**: Anyone can view this note but only the owner can edit it.
<i class="fa fa-umbrella fa-fw"></i> **Protected**: People have to sign-in to view this note but only owner can edit.
<i class="fa fa-hand-stop-o fa-fw"></i> **Private**: Only the owner can view and edit this note.
**Only the owner of the note can change the note's permissions.**
## Embed a Note:
Notes can be embedded as follows:
```xml
<iframe width="100%" height="500" src="https://hackmd.io/features" frameborder="0"></iframe>
```
## [Slide Mode](./slide-example):
You can use a special syntax to organize your note into slides.
After that, you can use the **Slide Mode** <i class="fa fa-tv"></i> to make a presentation.
Visit the above link for details.
## [Book Mode](./book-example):
You can make your notes into a book.
List your links in order or nest them.
Then use the **Book Mode** <i class="fa fa-book"></i> to make a collection.
Visit the above link for details.
View
===
## Table of Contents:
You can look at the bottom right section of the view area, there is a _ToC_ button <i class="fa fa-bars"></i>.
Pressing that button will show you a current _Table of Contents_, and will highlight which section you're at.
ToCs support up to **three header levels**.
## Permalink
Every header will automatically add a permalink on the right side.
You can hover and click <i class="fa fa-chain"></i> to anchor on it.
Edit:
===
## Shortcut Keys:
Just like Sublime text, which is pretty quick and convenient.
> For more infomation, see [here](https://codemirror.net/demo/sublime.html).
## Auto-Complete:
This editor provides full auto-complete hints in markdown.
- Emojis: type `:` to show hints.
- Code blocks: type ` ``` ` and plus a character to show hint. <i hidden>```</i>
- Headers: type `#` to show hint.
- Referrals: type `[]` to show hint.
- Externals: type `{}` to show hint.
- Images: type `!` to show hint.
## Title:
This will take the first **level 1 header** as the note title.
## Tags:
Using tags as follows, the specified tags will show in your **history**.
###### tags: `features` `cool` `updated`
## [YAML Metadata](./yaml-metadata)
You can provide advanced note information to set the browser behavior (visit above link for details):
- robots: set web robots meta
- lang: set browser language
- dir: set text direction
- breaks: set to use line breaks
- GA: set to use Google Analytics
- disqus: set to use Disqus
- slideOptions: setup slide mode options
## ToC:
Use the syntax `[TOC]` to embed table of content into your note.
[TOC]
## Emoji
You can type any emoji like this :smile: :smiley: :cry: :wink:
> See full emoji list [here](http://www.emoji-cheat-sheet.com/).
## ToDo List:
- [ ] ToDos
- [x] Buy some salad
- [ ] Brush teeth
- [x] Drink some water
## Code Block:
We support many programming languages, use the auto complete function to see the entire list.
```javascript=
var s = "JavaScript syntax highlighting";
alert(s);
function $initHighlight(block, cls) {
try {
if (cls.search(/\bno\-highlight\b/) != -1)
return process(block, true, 0x0F) +
' class=""';
} catch (e) {
/* handle exception */
}
for (var i = 0 / 2; i < classes.length; i++) {
if (checkCondition(classes[i]) === undefined)
return /\d+[\s/]/g;
}
}
```
> If you want **line numbers**, type `=` after specifying the code block languagues.
> Also, you can specify the start line number.
> Like below, the line number starts from 101:
```javascript=101
var s = "JavaScript syntax highlighting";
alert(s);
function $initHighlight(block, cls) {
try {
if (cls.search(/\bno\-highlight\b/) != -1)
return process(block, true, 0x0F) +
' class=""';
} catch (e) {
/* handle exception */
}
for (var i = 0 / 2; i < classes.length; i++) {
if (checkCondition(classes[i]) === undefined)
return /\d+[\s/]/g;
}
}
```
> Or you might want to continue the previous code block's line number, use `=+`
```javascript=+
var s = "JavaScript syntax highlighting";
alert(s);
```
> Somtimes you have a super long text without breaks. It's time to use `!` to wrap your code.
```!
When you’re a carpenter making a beautiful chest of drawers, you’re not going to use a piece of plywood on the back.
```
### Blockquote Tags:
> Using the syntax below to specifiy your **name, time and color** to vary the blockquotes.
> [name=ChengHan Wu] [time=Sun, Jun 28, 2015 9:59 PM] [color=#907bf7]
> > Even support the nest blockquotes!
> > [name=ChengHan Wu] [time=Sun, Jun 28, 2015 10:00 PM] [color=red]
## Externals
### YouTube
{%youtube 1G4isv_Fylg %}
### Vimeo
{%vimeo 124148255 %}
### Gist
{%gist schacon/4277%}
### SlideShare
{%slideshare briansolis/26-disruptive-technology-trends-2016-2018-56796196 %}
### Speakerdeck
{%speakerdeck sugarenia/xxlcss-how-to-scale-css-and-keep-your-sanity %}
### PDF
**Caution: this might be blocked by your browser if not using an `https` URL.**
{%pdf https://papers.nips.cc/paper/5346-sequence-to-sequence-learning-with-neural-networks.pdf %}
## MathJax
You can render *LaTeX* mathematical expressions using **MathJax**, as on [math.stackexchange.com](http://math.stackexchange.com/):
The *Gamma function* satisfying $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$ is via the Euler integral
$$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}.
$$
$$
\Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt\,.
$$
> More information about **LaTeX** mathematical expressions [here](http://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference).
## UML Diagrams
### Sequence Diagrams
You can render sequence diagrams like this:
```sequence
Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!
Note left of Alice: Alice responds
Alice->Bob: Where have you been?
```
### Flow Charts
Flow charts can be specified like this:
```flow
st=>start: Start
e=>end: End
op=>operation: My Operation
op2=>operation: lalala
cond=>condition: Yes or No?
st->op->op2->cond
cond(yes)->e
cond(no)->op2
```
### Graphviz
```graphviz
digraph hierarchy {
nodesep=1.0 // increases the separation between nodes
node [color=Red,fontname=Courier,shape=box] //All nodes will this shape and colour
edge [color=Blue, style=dashed] //All the lines look like this
Headteacher->{Deputy1 Deputy2 BusinessManager}
Deputy1->{Teacher1 Teacher2}
BusinessManager->ITManager
{rank=same;ITManager Teacher1 Teacher2} // Put them on the same level
}
```
### Mermaid
```mermaid
gantt
title A Gantt Diagram
section Section
A task :a1, 2014-01-01, 30d
Another task :after a1 , 20d
section Another
Task in sec :2014-01-12 , 12d
anther task : 24d
```
### Abc
```abc
X:1
T:Speed the Plough
M:4/4
C:Trad.
K:G
|:GABc dedB|dedB dedB|c2ec B2dB|c2A2 A2BA|
GABc dedB|dedB dedB|c2ec B2dB|A2F2 G4:|
|:g2gf gdBd|g2f2 e2d2|c2ec B2dB|c2A2 A2df|
g2gf g2Bd|g2f2 e2d2|c2ec B2dB|A2F2 G4:|
```
> More information about **sequence diagrams** syntax [here](http://bramp.github.io/js-sequence-diagrams/).
> More information about **flow charts** syntax [here](http://adrai.github.io/flowchart.js/).
> More information about **graphviz** syntax [here](http://www.tonyballantyne.com/graphs.html)
> More information about **mermaid** syntax [here](http://knsv.github.io/mermaid)
> More information about **abc** syntax [here](http://abcnotation.com/learn)
Alert Area
---
:::success
Yes :tada:
:::
:::info
This is a message :mega:
:::
:::warning
Watch out :zap:
:::
:::danger
Oh No! :fire:
:::
## Typography
### Headers
```
# h1 Heading
## h2 Heading
### h3 Heading
#### h4 Heading
##### h5 Heading
###### h6 Heading
```
### Horizontal Rules
___
---
***
### Typographic Replacements
Enable typographer option to see result.
(c) (C) (r) (R) (tm) (TM) (p) (P) +-
test.. test... test..... test?..... test!....
!!!!!! ???? ,,
Remarkable -- awesome
"Smartypants, double quotes"
'Smartypants, single quotes'
### Emphasis
**This is bold text**
__This is bold text__
*This is italic text*
_This is italic text_
~~Deleted text~~
lu~lala~
Superscript: 19^th^
Subscript: H~2~O
++Inserted text++
==Marked text==
### Blockquotes
> Blockquotes can also be nested...
>> ...by using additional greater-than signs right next to each other...
> > > ...or with spaces between arrows.
### Lists
#### Unordered
+ Create a list by starting a line with `+`, `-`, or `*`
+ Sub-lists are made by indenting 2 spaces:
- Marker character change forces new list start:
* Ac tristique libero volutpat at
+ Facilisis in pretium nisl aliquet
- Nulla volutpat aliquam velit
+ Very easy!
#### Ordered
1. Lorem ipsum dolor sit amet
2. Consectetur adipiscing elit
3. Integer molestie lorem at massa
1. You can use sequential numbers...
1. ...or keep all the numbers as `1.`
1. feafw
2. 332
3. 242
4. 2552
1. e2
Start numbering with offset:
57. foo
1. bar
### Code
Inline `code`
Indented code
// Some comments
line 1 of code
line 2 of code
line 3 of code
Block code "fences"
```
Sample text here...
```
Syntax highlighting
``` js
var foo = function (bar) {
return bar++;
};
console.log(foo(5));
```
### Tables
| Option | Description |
| ------ | ----------- |
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Right aligned columns
| Option | Description |
| ------:| -----------:|
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Left aligned columns
| Option | Description |
|:------ |:----------- |
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Center aligned columns
| Option | Description |
|:------:|:-----------:|
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
### Links
[link text](http://dev.nodeca.com)
[link with title](http://nodeca.github.io/pica/demo/ "title text!")
Autoconverted link https://github.com/nodeca/pica
### Images
Like links, Images also have a footnote style syntax
![Alt text][id]
With a reference later in the document defining the URL location:
[id]: https://octodex.github.com/images/dojocat.jpg "The Dojocat"
Show the image with given size
### Footnotes
Footnote 1 link[^first].
Footnote 2 link[^second].
Inline footnote^[Text of inline footnote] definition.
Duplicated footnote reference[^second].
[^first]: Footnote **can have markup**
and multiple paragraphs.
[^second]: Footnote text.
### Definition Lists
Term 1
: Definition 1
with lazy continuation.
Term 2 with *inline markup*
: Definition 2
{ some code, part of Definition 2 }
Third paragraph of definition 2.
_Compact style:_
Term 1
~ Definition 1
Term 2
~ Definition 2a
~ Definition 2b
### Abbreviations
This is an HTML abbreviation example.
It converts "HTML", but keeps intact partial entries like "xxxHTMLyyy" and so on.
*[HTML]: Hyper Text Markup Language
# Acronym Package
#### Info
Uses suffix package from bigfoot package. (see CTAN)
https://www.namsu.de/Extra/pakete/Acronym.html
#### Usage
```tex
\usepackage[printonlyused,withpage]{acronym}
\begin{acronym}
\setlength{\itemsep}{-0.3cm}
\acro{ACS}{Institute for Automation of Complex Power Systems}
\acro{IB}{InfiniBand}
\end{acronym}
```
#### Shortcuts in text
```tex
\ac{HP} % normal
\acp{HP} % for plural
\acf{HP} % long and abbreviation
\acl{HP} % only long version
\acs{HP} % only short form
```
Install package manually.md
# Package Installation
#### Update Tex Live Manager:
```bash
sudo /usr/local/texlive/2017/bin/x86_64-linux/tlmgr update --self
```
#### Automatic installation using Tex Live Manager:
```bash
sudo /usr/local/texlive/2017/bin/x86_64-linux/tlmgr install acronym
```
#### Manual installation if package not found in repo after extracting zip
```bash
# https://en.wikibooks.org/wiki/LaTeX/Installing_Extra_Packages#Installing_a_package
latex packagename.ins
sudo cp -r \
~/Downloads/packagename/styfilename.sty \
/usr/local/texlive/texmf-local/texmf/tex/packagename
sudo texhash
```