Managed to get answer after do some google..

	echo &quot;deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main&quot; | tee -a /etc/apt/sources.list
	echo &quot;deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu precise main&quot; | tee -a /etc/apt/sources.list
	apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886
	apt-get update
	# Java 7
	apt-get install oracle-java7-installer
	# For Java 8 command is:
	apt-get install oracle-java8-installer



I&#39;m using GIT as my source control system. We have it installed on one of our Linux boxes. Tortoise GIT is my windows client.

This morning I checked in some changes, and tagged the code. I then did a push of my local repository to the remote repository.

When I go to my repository on the unix box and type in `git log` I get:
    
    fatal: bad default revision &#39;HEAD&#39;

But when I do a `show log` using my windows `tortoiseGit` client the history comes up nicely as per below...

    ---
    SHA-1: f879573ba3d8e62089b8c673257c928779f71692
    
    Initial drop of code
    
    ---
    master origin/master oms-phase4-v1.0.0
    SHA-1: 56176dbe45e6175b18c9f44533828806c63142ab
    
    OMS Phase 4 - Added OMS Cust. Order No. to EDI Purchase Order Header screens
    
    Tag Info
    
    object 56176dbe45e6175b18c9f44533828806c63142ab
    type commit
    tag oms-phase4-v1.0.0
    tagger Richard Riviere &lt;richard.riviere@myer.com.au&gt; 1364338495 +1100
    
    ---
    SHA-1: 0000000000000000000000000000000000000000
    
    Working dir changes
    0 files changed
    
    ---

The code has definitely been pushed to the remote repository. I&#39;ve been able to check by cloning the repository into a different directory.

Does anyone know why I am receiving the `fatal: bad default revision &#39;HEAD&#39;`?

p.s. It is a bare repository however I have created other bare repositories which have not had this problem.

fatal: bad default revision &#39;HEAD&#39;

Can anyone help me pull the value of a registry key and place it into a variable in PowerShell?  So far I have used `Get-ItemProperty` and `reg query` and although both will pull the value, both also add extra text.  I need just the string text from the registry key and ONLY the string text from the key.  I&#39;m sure I could create a function to strip off the extra text but if something changes (i.e. reg key name) it might affect this.

How do I get the value of a registry key and ONLY the value using powershell

Installing Oracle Java 7 in Debian via  apt-get repository doesn&#39;t seems to work. 

    apt-get install oracle-java7-installer

Look like `apt-get` does not recognize `oracle-java7-installer`.

Installing Java 7 (Oracle) in Debian via apt-get

<p>Installing Oracle Java 7 in Debian via  apt-get repository doesn't seems to work.</p>
<pre><code class="hljs language-arduino">apt-get install oracle-java7-installer
</code></pre>
<p>Look like <code>apt-get</code> does not recognize <code>oracle-java7-installer</code>.</p>


With the usage of wget command line I got a tar.gz file. I downloaded it in the root@raspberrypi. Is there any way to uncompress it in the /usr/src folder?

Uncompress tar.gz file

I launched my program in the foreground (a daemon program), and then I killed it with `kill -9`, but I get a zombie remaining and I m not able to kill it with `kill -9`. How to kill a zombie process?

If the zombie is a dead process (already killed), how I remove it from the output of `ps aux`?

    root@OpenWrt:~# anyprogramd &amp;
    root@OpenWrt:~# ps aux | grep anyprogram
     1163 root      2552 S    anyprogramd
     1167 root      2552 S    anyprogramd
     1169 root      2552 S    anyprogramd
     1170 root      2552 S    anyprogramd
    10101 root       944 S    grep anyprogram
    root@OpenWrt:~# pidof anyprogramd
    1170 1169 1167 1163
    root@OpenWrt:~# kill -9 1170 1169 1167 1163
    root@OpenWrt:~# ps aux |grep anyprogram
     1163 root         0 Z    [anyprogramd]
    root@OpenWrt:~# kill -9 1163
    root@OpenWrt:~# ps aux |grep anyprogram
     1163 root         0 Z    [anyprogramd]



How to kill zombie process

I am new to system administration. After installing nginx [via puppet][1] on Ubuntu I get the following output:

    [alert] could not open error log file: open() &quot;/var/log/nginx/error.log&quot; failed (13: Permission denied)
    
    [warn] 1898#0: the &quot;user&quot; directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:1
    
    [emerg] 1898#0: open() &quot;/var/log/nginx/access.log&quot; failed (13: Permission denied)

How do I get rid of all of these messages?

I don&#39;t want to use command line directly (chown / chmod) and repeat it every time I create a new server. Therefore, I am thinking of what has to be added to the puppet manifest.

What is the best sysadmin practice in this case: to change owner / permissions for /var/log/nginx or to store logs in different location? If chown / chmod is the way to go, which specific permissions would ensure the highest level of security?

I tried this, but it didn&#39;t help:

      file { &#39;/var/log/nginx&#39;:
        ensure  =&gt; directory,
        mode    =&gt; &#39;0755&#39;,
        owner   =&gt; &#39;www-data&#39;,
        group   =&gt; &#39;www-data&#39;,
        recurse =&gt; true
      }

Edited:

    vagrant@precise64:~$ ps aux | grep [n]ginx
    root      1001  0.0  0.1  62908  1388 ?        Ss   08:47   0:00 nginx: master process /usr/sbin/nginx
    www-data  1002  0.0  0.1  63260  1696 ?        S    08:47   0:00 nginx: worker process
    www-data  1003  0.0  0.1  63260  1696 ?        S    08:47   0:00 nginx: worker process
    www-data  1004  0.0  0.1  63260  1696 ?        S    08:47   0:00 nginx: worker process
    www-data  1005  0.0  0.1  63260  1696 ?        S    08:47   0:00 nginx: worker process

  [1]: https://github.com/kasperisager/puppet-nginx


Nginx: Permission denied for nginx on Ubuntu

I&#39;m thinking to install *hylafax+* version 5.5.4 which was release last month on my [Debian][1] PC.

I checked `dpkg -l | grep &quot;hylafax&quot;` and found out that the current version is 5.5.3. Then I checked `apt-cache search hylafax` and saw the packages are available, but I can&#39;t see any version number.

How can I find the version of packages available in the `apt-get`?

  [1]: http://en.wikipedia.org/wiki/Debian

How to check the version before installing a package using apt-get?

I have a **text file containing a specific date and time.** 
I want to be able to **run a script at the time specified in that file.**
How would you achieve that?
Create another script that runs in background (sort of a deamon) and checks every second if the current time is matching the time in the file?
Is there another way?
The machine is a **linux** server , Debian wheezy.
Thanks in advance

How to run a script at a certain time on Linux?

Is there an API to get a classpath resource (e.g. what I&#39;d get from [`Class.getResource(String)`][1]) as a [`java.nio.file.Path`][2]?  Ideally, I&#39;d like to use the fancy new `Path` APIs with classpath resources.


  [1]: http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#getResource%28java.lang.String%29
  [2]: https://docs.oracle.com/javase/7/docs/api/java/nio/file/Path.html

java.nio.file.Path for a classpath resource

I have noted a difference in auto unboxing behavior between Java SE 6 and Java SE 7. I&#39;m wondering why that is, because I can&#39;t find any documentation of changes in this behavior between these two versions. 

Here&#39;s a simple example:

    Object[] objs = new Object[2];
    objs[0] = new Integer(5);
    int myInt = (int)objs[0];

This compiles fine with javac from Java SE 7. However, if I give the compiler the &quot;-source 1.6&quot; argument I get an error on the last line:

    inconvertible types
    found   : java.lang.Object
    required: int

I tried downloading the Java SE 6 to compile with the native version 6 compiler (without any -source option). It agrees and gives the same error as above.

So what gives? From some more experimentation it seems that the unboxing in Java 6 can only unbox values that clearly (at compile time) is of the boxed type. For instance, this works in both versions:

    Integer[] objs = new Integer[2];
    objs[0] = new Integer(5);
    int myInt = (int)objs[0];


So it seems that between Java 6 and 7, the unboxing feature was enhanced so that it could cast and unbox object types in one swoop, without knowing (at compile time) that the value is of the proper boxed type. However, reading through the Java Language Specification or blog postings that were written at the time Java 7 came out, I can&#39;t see any change of this thing, so I&#39;m wondering what the change is and what this &quot;feature&quot; is called?

Just a curiosity: Due the change, it is possible to trigger &quot;wrong&quot; unboxings:

    Object[] objs = new Float[2];
    objs[0] = new Float(5);
    int myInt = (int)objs[0];

This compiles fine but gives a ClassCastException at runtime.

Any reference on this?

Differences in auto-unboxing between Java 6 vs Java 7

Java 8 introduces important new language features such as lambda expressions.

Are these changes in the language accompanied by such significant changes in the compiled bytecode that would prevent it from being run on a Java 7 virtual machine without using some retrotranslator?

Can Java 8 code be compiled to run on Java 7 JVM?

I just installed IntelliJ IDEA and when I try to create my first Project it asks for me to set up the Project SDK. When I click on &quot;JDK&quot; it asks for me to select the home directory of the JDK as shown in this image.

![enter image description here][1]
  
I&#39;m having trouble locating where it is.


  [1]: http://i.stack.imgur.com/nUsmm.png

How to set IntelliJ IDEA Project SDK

How can I create a [`java.nio.file.Path`][1] object from a `String` object in Java 7?

I.e.

    String textPath = &quot;c:/dir1/dir2/dir3&quot;;
    Path path = ?;

where `?` is the missing code that uses `textPath`.

  [1]: http://docs.oracle.com/javase/7/docs/api/java/nio/file/Path.html

Create a Path from String in Java7

Try:

    sudo apt-get install maven

If it works for you ignore the rest of this post.

## Intro
I started setting up my Ubuntu 12.10 on April 2013 and the normal  `sudo apt-get install maven` was not working for maven 3 back then. 

The **manual installation** in this post is useful if you like to dig in deeper to your ubuntu kernel in regards with apt-get and where it finds the list of applications that are available for installation on Ubuntu
. It can also be potentially useful for more recent releases of Ubuntu like **Ubuntu 15.04**, etc. if you face the same problem as I did back then with Ubuntu 12.10. 
 
## Automatic Installation via apt-get:
Checkout the **manual installation** if your current ubuntu can not install maven via common &#39;apt-get install maven&#39;.
    
    sudo apt-get update
    sudo apt-get install maven

Make sure to remove maven 2 if your ubuntu is not fresh or if you were using maven 2 before:

    sudo apt-get remove maven2


##Manual Installation via apt-get by adding maven 3 repository (Ubuntu 14.04 check out update 1):
This can be useful if your ubuntu apt-get repositories list is not up to date.
   
Maven 3 was required to set up the system and as it turns out most of the documents out there are referring to how to install Maven to Ubuntu version 12.04 or before. Best document I found was:

[killertilapia&#39;s blog][1]

The whole process I came up with is as follows:

1. `sudo -H gedit /etc/apt/sources.list`
2. Add the following line the `sources.list` file:

 &gt; deb http://ppa.launchpad.net/natecarlson/maven3/ubuntu precise main 

 &gt;deb-src http://ppa.launchpad.net/natecarlson/maven3/ubuntu precise main

3. `sudo apt-get update &amp;&amp; sudo apt-get install maven3`
4. `sudo ln -s /usr/share/maven3/bin/mvn /usr/bin/mvn`

&gt; Caution 1: command &quot;sudo apt-add-repository ppa:natecarlson/maven3&quot; did not work on my  Ubuntu and had to run `sudo apt-add-repository -rm ppa:natecarlson/maven3` to get my apt-get to work again.

&gt; Caution 2: thanks to David, you need to remove your existing symbolic link to previous versions of maven before running step 4.

##OS X Installation
I decided to add OS X installation in case you use multiple environments for your dev: [See the source stackoverflow thread for more details][2].

Install [Homebrew][3] that is the equavalent of `apt-get`, then install Maven using:

    brew install maven

## **Update 1**: **Installation for Ubunutu 14.04**

Haven&#39;t tried this myself but I am confident this should work without security warnings:

    sudo apt-get purge maven maven2 maven3
    sudo apt-add-repository ppa:andrei-pozolotin/maven3
    sudo apt-get update
    sudo apt-get install maven3

**Note**: source [here][4], many thanks and +1s to @rendybjunior, @Dominic_Bartl, and @FunThomas424242 


  [1]: http://killertilapia.blogspot.com.au/2012/10/installing-maven-3-in-ubuntu-1204.html
  [2]: https://stackoverflow.com/questions/8826881/maven-install-on-mac-os-x
  [3]: http://brew.sh/
  [4]: https://launchpad.net/~andrei-pozolotin/+archive/ubuntu/maven3


How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04 by using apt-get?

I want to install ruby **2.0** using

    sudo apt-get install ruby2.0

But there isn&#39;t available package for ruby2.0

I want to install it using **apt-get install** the same like ruby 1.9.1

Any suggestions?

How to install Ruby 2 on Ubuntu without RVM

I&#39;ve installed node.js in my machine (linux mint 15), when I run `node example.js`, it says:

    The program &#39;node&#39; can be found in the following packages:
     * node
     * nodejs-legacy
    Try: sudo apt-get install &lt;selected package&gt;

So what are the differences between node and nodejs? I had both node.js and node installed previously, but when I run `node example.js`, the web server doesn&#39;t start at all. So I deleted node and kept node.js.   

What are the differences between node.js and node?

Is it possible to somehow answer the questions that are presented as dialogs when installing some packages using apt-get?

For instance I&#39;m trying to setup a container containing the `mail-stack-delivery` package with:

    FROM ubuntu

    RUN apt-get install -y mail-stack-delivery

However that dockerfile generates dozens of errors when built that are along the lines of:

    debconf: unable to initialize frontend: Dialog
    debconf: (TERM is not set, so the dialog frontend is not usable.)
    debconf: falling back to frontend: Readline
    debconf: unable to initialize frontend: Readline
    debconf: (Can&#39;t locate Term/ReadLine.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at /usr/share/perl5/Debconf/FrontEnd/Readline.pm line 7, &lt;&gt; line 11.)
    debconf: falling back to frontend: Teletype
    dpkg-preconfigure: unable to re-open stdin: 

From what I understand I just simply can&#39;t respond to the dialogs, but is there some way that I can pass a parameter to answer each question in advance? I know that it&#39;s just changing some configurations, so I could do it after the fact, but presumably it&#39;s better to let the install scripts do it so everything gets set properly.

Content Type	Original Author	Original Content on Stackoverflow
Question	AzizSM	View Question on Stackoverflow
Solution 1 - Debian	AzizSM	View Answer on Stackoverflow

Installing Java 7 (Oracle) in Debian via apt-get

Debian Problem Overview

Debian Solutions

Solution 1 - Debian

How do I get the value of a registry key and ONLY the value using powershell

fatal: bad default revision 'HEAD'

Attributions