Using [imagemagick](http://www.imagemagick.org/script/index.php), you can try:

    convert page.png page.pdf

Or for multiple images:

    convert page*.png mydoc.pdf

&lt;s&gt;Use `convert` from http://www.imagemagick.org.  (Readily supplied as a package in most Linux distributions.)&lt;/s&gt;

10 years later...

Agreed with Robert and others here.  Use something like img2pdf instead.

[Usage][1]:

```
img2pdf img1.png img2.jpg -o out.pdf
```


  [1]: https://gitlab.mister-muffin.de/josch/img2pdf#usage

I&#39;m looking at how to do file input and output in Python. I&#39;ve written the following code to read a list of names (one per line) from a file into another file while checking a name against the names in the file and appending text to the occurrences in the file. The code works. Could it be done better? 

I&#39;d wanted to use the `with open(...` statement for both input and output files but can&#39;t see how they could be in the same block meaning I&#39;d need to store the names in a temporary location. 


    def filter(txt, oldfile, newfile):
        &#39;&#39;&#39;\
        Read a list of names from a file line by line into an output file.
        If a line begins with a particular name, insert a string of text
        after the name before appending the line to the output file.
        &#39;&#39;&#39;
        
        outfile = open(newfile, &#39;w&#39;)
        with open(oldfile, &#39;r&#39;, encoding=&#39;utf-8&#39;) as infile:
            for line in infile:
                if line.startswith(txt):
                    line = line[0:len(txt)] + &#39; - Truly a great person!\n&#39;
                outfile.write(line)
    
        outfile.close()
        return # Do I gain anything by including this?
    
    # input the name you want to check against
    text = input(&#39;Please enter the name of a great person: &#39;)    
    letsgo = filter(text,&#39;Spanish&#39;, &#39;Spanish2&#39;)




How to open a file using the open with statement

I&#39;m looking for a generalized solution for this.

Consider 2 radio type inputs with the same name. When submitted, the one that is checked determines the value that gets sent with the form:

    &lt;input type=&quot;radio&quot; name=&quot;myRadios&quot; onchange=&quot;handleChange1();&quot; value=&quot;1&quot; /&gt;
    &lt;input type=&quot;radio&quot; name=&quot;myRadios&quot; onchange=&quot;handleChange2();&quot; value=&quot;2&quot; /&gt;

The change event does not fire when a radio button is de-selected. So if the radio with `value=&quot;1&quot;` is already selected and the user selects the second, `handleChange1()` does not run. This presents a problem (for me anyway) in that there is no event where I can catch this de-selection.

What I would like is a workaround for the `onChange` event for the checkbox group value or alternatively, an `onCheck` event that detects not only when a radio button is checked but also when it is unchecked.

I&#39;m sure some of you have run into this problem before. What are some workarounds (or ideally what is the right way to handle this)? I just want to catch the change event, access the previously checked radio as well as the newly checked radio.

P.S.  
`onClick` seems like a better (cross-browser) event to indicate when a radio button is checked but it still does not solve the unchecked problem.

I suppose it makes sense why `onChange` for a checkbox type does work in a case like this since it changes the value that it submits when you check or un-check it. I wish the radio buttons behaved more like a SELECT element&#39;s `onChange` but what can you do...

OnChange event handler for radio button (INPUT type=&quot;radio&quot;) doesn&#39;t work as one value

I have a scanning server I wrote in cgi/bash and want to be able to convert a bunch of images (all in one folder) to a pdf from the command line. How can that be done?

How can I convert a series of images to a PDF from the command line on linux?

<p>I have a scanning server I wrote in cgi/bash and want to be able to convert a bunch of images (all in one folder) to a pdf from the command line. How can that be done?</p>


I am trying to save plots I make using matplotlib; however, the images are saving blank.

Here is my code:

    plt.subplot(121)
    plt.imshow(dataStack, cmap=mpl.cm.bone)
    
    plt.subplot(122)
    y = copy.deepcopy(tumorStack)
    y = np.ma.masked_where(y == 0, y)
   
    plt.imshow(dataStack, cmap=mpl.cm.bone)
    plt.imshow(y, cmap=mpl.cm.jet_r, interpolation=&#39;nearest&#39;)
    
    if T0 is not None:
        plt.subplot(123)
        plt.imshow(T0, cmap=mpl.cm.bone)
        
        #plt.subplot(124)
        #Autozoom
        
    #else:
        #plt.subplot(124)
        #Autozoom
    
    plt.show()
    plt.draw()
    plt.savefig(&#39;tessstttyyy.png&#39;, dpi=100)

And tessstttyyy.png is blank (also tried with .jpg)

Matplotlib (pyplot) savefig outputs blank image

I want to contain an image into a 250 x 250 div, forcing the image to resize but not stretch. How can I do this? By the way, the image will usually be bigger than the div itself, which is why resizing comes into the picture.

    &lt;div id = &quot;container&quot;&gt;
      &lt;img src = &quot;whatever&quot; /&gt;
    &lt;/div&gt;

    #container { width:250px; height:250px; border:1px solid #000; }

Here&#39;s a jsfiddle which someone can edit:

http://jsfiddle.net/rV77g/


Contain an image within a div?

I have to include some images (company logo&#39;s etc) in email signatures. I&#39;ve had all sorts of issues using the embedded images produced by the email system in question (they get sent as attachments generally) and as linked images (requiring permission to display them in the email received).

I have just seen some email from exchange that has a base64 image representation of the logo and uses a &lt;src=&quot;cid:image001.gif&quot;&gt; tag to do the displaying. I&#39;m looking for some information on how I could do this in an email signature if possible (how do I generate the base64 version of the logo for a start and what code do I need to get it to work)?

I&#39;ve tried simple things such as 

    &lt;body&gt;
    &lt;span&gt;
    &lt;img src=.... &gt;
    &lt;/span&gt;
    &lt;/body&gt;

but all I get is the alt text so I&#39;m obviously doing something wrong here.

base64 encoded images in email signatures

I found JPG does not support transparency, the alpha value is always 255. I am wondering only png supports transparency?

Only PNG supports transparency, is that true?

I have a web server running with Jersey REST resources up and I wonder how to get an image/png reference for the browsers img tag; after submitting a Form or getting an Ajax response. The image processing code for adding graphics is working, just need to return it somehow.

Code:

    @POST
    @Path(&quot;{fullsize}&quot;)
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Produces(&quot;image/png&quot;)
    // Would need to replace void
    public void getFullImage(@FormDataParam(&quot;photo&quot;) InputStream imageIS,
                             @FormDataParam(&quot;submit&quot;) String extra) {

          BufferedImage image = ImageIO.read(imageIS);

          // .... image processing
          //.... image processing

          return ImageIO.  ..  ?

    }


Cheers

How to return a PNG image from Jersey REST service method to the browser

I&#39;m on OSX and I need to put something like this, `alias blah=&quot;/usr/bin/blah&quot;` in a config file but I don&#39;t know where the config file is. 


How do I create a Bash alias?

I have made [Bash][1] scripts before and they all ran fine without `#!/bin/bash` at the beginning.

What&#39;s the point of putting it in? Would things be any different?

Also, how do you pronounce `#`? I know that `!` is pronounced as &quot;bang.&quot;

How is `#!` pronounced?

  [1]: http://en.wikipedia.org/wiki/Bash_%28Unix_shell%29


Why do you need to put #!/bin/bash at the beginning of a script file?

I just want to check if one parameter was supplied in my bash script or not. 

I found [this][1], but all the solutions seem to be unnecessarily complicated.

What&#39;s a simple solution to this simple problem that would make sense to a beginner?


  [1]: https://stackoverflow.com/questions/699576/validating-parameters-to-a-bash-script

How to check that a parameter was supplied to a bash script

I&#39;ve looked around for an answer to this one but couldn&#39;t find one.

I have written a simple script that does initial server settings and I&#39;d like it to remove/unlink itself from the root directory on completion. I&#39;ve tried a number of solutions i googled ( for example /bin/rm $test.sh)   but the script always seems to remain in place. Is this possible? Below is my script so far.

    #! /bin/bash
    cd /root/
    wget -r -nH -np --cut-dirs=1 http://myhost.com/install/scripts/
    rm -f index.html* *.gif */index.html* */*.gif robots.txt
    ls -al /root/
    
    if [ -d /usr/local/psa ]
    	then
            echo plesk &gt; /root/bin/INST_SERVER_TYPE.txt
    	chmod 775 /root/bin/*
    	/root/bin/setting_server_ve.sh
    	rm -rf /root/etc | rm -rf /root/bin | rm -rf /root/log | rm -rf /root/old
    	sed -i &quot;75s/false/true/&quot; /etc/permissions/jail.conf
            exit 1;
    elif [ -d /var/webmin ]
    	then
    	echo webmin &gt; /root/bin/INST_SERVER_TYPE.txt
    	chmod 775 /root/bin/*
    	/root/bin/setting_server_ve.sh
    	rm -rf /root/etc | rm -rf /root/bin | rm -rf /root/log | rm -rf /root/old
    	sed -i &quot;67s/false/true/&quot; /etc/permissions/jail.conf
            break
    	exit 1;
    else
    	echo no-gui &gt; /root/bin/INST_SERVER_TYPE.txt
    	chmod 775 /root/bin/*
    	/root/bin/setting_server_ve.sh
    	rm -rf /root/etc | rm -rf /root/bin | rm -rf /root/log | rm -rf /root/old
    	sed -i &quot;67s/false/true/&quot; /etc/permissions/jail.conf
            break
    	exit 1;
    fi	



self-deleting shell script

I want to kill all processes that I get by:

    ps aux | grep my_pattern

How to do it?

This does not work:

    pkill my_pattern

 

How to kill all processes with a given partial name?

Is it possible to embed animated GIFs in PDFs? And how might I go about such a thing? are there any dangers I should be aware of?

For some more details on why I think it&#39;s a good thing and how it helps [feel free to see this post][1]. I didn&#39;t think it was appropriately well-formed enough for SE. 

As an example - I&#39;d like to put this into a description of quicksort: 

![quicksort animation from wikipedia][2]
&lt;br&gt;
(This animation is from [wikimedia](https://commons.wikimedia.org/wiki/File:Sorting_quicksort_anim.gif).)

  [1]: https://joereddington.github.io/2014/04/18/animated.html
  [2]: http://i.stack.imgur.com/vZRiQ.gif

Is it possible to embed animated GIFs in PDFs?

 - Many applications like RepliGo, Aldiko, Mantano, ezPdf in android market make this type of annotation in their pdf viewer shown in the below image.
 -  I tried in many ways to implement this annotation but I failed. I have a pdf viewer for android and separate java code for annotations using iText for drawing lines. 
 -  My question is can i able to implement iText in android. If it&#39;s possible, which package do I have to import?
 -  Also in some applications, a canvas method is used for drawing lines. Is it possible to include this canvas method in android instead of using an annotation?. The goal would be to have the same features that annotations have. 
 - In the below image (RepliGo PDF Reader) which kind of code did they use for annotations?
![enter image description here][1]


  [1]: http://i.stack.imgur.com/vPrym.jpg

How to make annotation like highlighting, strikethrough, underline, draw, add text, etc in android for a pdf viewer?

Is that even possible!?!

I have a bunch of legacy reports that I need to import into a database.  However, they&#39;re all in pdf format.  Are there any `R` packages that can read pdf?  Or should I leave that to a command line tool?

The reports were made in excel and then pdfed, so they have regular structure, but many blank &quot;cells&quot;.

Reading data from PDF files into R

## Where can I find *documentation* on running JavaScript code inside a PDF? ##

I&#39;ve never added a JavaScript action inside a PDF document. However, I&#39;ve done quite a bit of web development using JavaScript. I have a few questions to whoever has any familiarity with JavaScript inside a PDF document.

NitroPDF and Adobe Acrobat definitely support JavaScript in PDF files. **Is there a standard on various objects that exist and functions to manipulate a PDF file via JavaScript?**  Everything I&#39;ve found so far has been from Adobe.  Anywhere else seems to reference Adobe&#39;s documentation.  Is there a standard out there, or is Adobe just the &quot;de Facto&quot; standard?

Also, **Do all PDF viewers support JavaScript actions?**

The best documentation on using JavaScript inside a PDF document that I could find was from Adobe - [Adobe :: Acrobat JavaScript Scripting Guide][1].

NitroPDF has this link - [NitroPDF :: JavaScript in PDF Files][2], but it basically just says it supports what Adobe has.

I also found this link from Scribus - [Scribus :: How to enhance your PDF forms with JavaScript][3], but this only includes a few small snippets of code.  Nothing super useful.

Adobe has documentation on how you can set breakpoints, etc... for JavaScript using their IDE.  Is it possible to run JavaScript in a PDF file using another IDE and have breakpoints, etc...? It would be awesome to find something as cool as [Firebug][4].

Note:
-----
Please do not answer how to manipulate a PDF that is loaded in a web browser.  The question is about running JavaScript from within a PDF document.  I&#39;m trying to explore the possibilities available via executing JavaScript in the PDF document.  Specifically I may use functions from [quickpdflibrary][5] to add JavaScript functionality to existing documents.

Another useful link is [Developing with Acrobat JavaScript][6]. Apparently JavaScript code in PDFs is frequently called AcroJS or Acrobat JavaScript.

  [1]: http://partners.adobe.com/public/developer/en/acrobat/sdk/AcroJSGuide.pdf
  [2]: http://www.nitropdf.com/help/pdf_javascript.htm
  [3]: http://wiki.scribus.net/canvas/How_to_enhance_your_PDF_forms_with_JavaScript
  [4]: http://getfirebug.com/
  [5]: http://www.quickpdflibrary.com/help/quickpdf/JavaScript.php
  [6]: http://www.planetpdf.com/developer/article.asp?ContentID=6622


Documentation for using JavaScript code inside a PDF file

I am considering using [pdf.js][1] (an open source tool that allows embedding of a pdf in a webpage). There isn&#39;t any documentation on how to use it.

I assume what I do is make an html page with the script referenced in the header, and then in the body, I put some sort of function call with an array of the file name and location. Can anyone help me out here?


  [1]: https://github.com/mozilla/pdf.js

Content Type	Original Author	Original Content on Stackoverflow
Question	Jakob Weisblat	View Question on Stackoverflow
Solution 1 - Image	Marvin Pinto	View Answer on Stackoverflow
Solution 2 - Image	ziesemer	View Answer on Stackoverflow

How can I convert a series of images to a PDF from the command line on linux?

Image Problem Overview

Image Solutions

Solution 1 - Image

Solution 2 - Image

OnChange event handler for radio button (INPUT type="radio") doesn't work as one value

How to open a file using the open with statement

Attributions