The find(1) utility has primaries that can be negated (&quot;reversed&quot;) using the &quot;!&quot; operator. On the prompt one must however escape the negation with a backslash as it is a shell metacharacter. Result:

    find . \! -user foo -print

&gt; Looking for files NOT owned by someone

Others have answered the question *&quot;NOT owned by a particular user&quot;* in the body. Here&#39;s one that answers the titular question but has not been provided:

    $ find / -nouser

You can use it like so:

    $ sudo find /var/www -nouser -exec chown root:apache {} \;

And a related one:

    $ find / -nogroup


`-user` finds by user or user ID, and `!` inverts the predicate. So, `! -user ...`.

You can use this:

    find &lt;dir&gt; ! -user &lt;username&gt; 

Using z-shell (zsh) you can use

    ls -laR *(^U)

or

    ls -la **/*(^U)

to search for all files recursively not owned by you.

How do I set it so the application is running in portrait mode only? I want the landscape mode to be disabled while the application is running. How do I do it programmatically?

How to set entire application in portrait mode only?

Here is a gross oversimplification of an intense setup I am working with. `table_1` and `table_2` both have auto-increment surrogate primary keys as the ID. `info` is a table that contains information about both `table_1` and `table_2`.

    table_1 (id, field)  
    table_2 (id, field, field)
    info ( ???, field)



I am trying to decided if I should make the primary key of `info` a composite of the IDs from `table_1` and `table_2`. If I were to do this, which of these makes most sense?    
*( in this example I am combining ID 11209 with ID 437 )* 

`INT(9)` 11209437   *(i can imagine why this is bad)*  
`VARCHAR (10)`    11209-437   
`DECIMAL (10,4)` 11209.437   

Or something else? 

Would this be fine to use this as the Primary Key on a MYSQL MYISAM DB?


How to properly create composite primary keys - MYSQL

I&#39;m looking to recursively look through directories to find files NOT owned by a particular user and I am not sure how to write this.

Looking for files NOT owned by a specific user

<p>I'm looking to recursively look through directories to find files NOT owned by a particular user and I am not sure how to write this.</p>


I am trying to print a text in the terminal using echo command. 

I want to print the text in a red color. How can I do that?






                 


How to change the output color of echo in Linux

I&#39;m using Red Hat Enterprise Linux 5, and I want to set the vim editor to edit the crontab file. 

If I run `echo $EDITOR`, I get vim. But when I run  `crontab -e`, I get different editor.

How to specify a editor to open crontab file? &quot;export EDITOR=vi&quot; does not work

I want to search a configuration file for this expression: &quot;central.database&quot;.
I then want to change the setting associated with &quot;central.database&quot; to &quot;SQLTEST&quot;.

The layout of the config file would look like this initially:

    central.database = SQLFIRSTTEST

This is what i want it to look like after the sed replacement:

    central.database = SQLTEST

I am doing this in a bash script, any suggestions, recommendations or alternative solutions are welcome!

(Actually both `central.database` and `SQLTEST` come from bash variables here.)

---    

My current code (third attempt):

    sshRetValue=$(ssh -p &quot;35903&quot; -i $HOME/sshids/idrsa-1.old ${1} &lt;&lt;EOF
            sed -i &quot;s/^$$CENTRAL_DB_NAME\s*=\s*$.*\$/\1$CENTRAL_DB_VALUE/&quot; /home/testing.txt;
            echo $?
    EOF
    )

Error message:

    Pseudo-terminal will not be allocated because stdin is not a terminal.
    sed: -e expression #1, char 58: unknown option to `s&#39;
    -bash: line 3: EOF: command not found







How do I use sed to change my configuration files, with flexible keys and values?

I&#39;d like to be able to use the result of the last executed command in a subsequent command. For example,

    $ find . -name foo.txt
    ./home/user/some/directory/foo.txt

Now let&#39;s say I want to be able to open the file in an editor, or delete it, or do something else with it, e.g.

    mv &lt;some-variable-that-contains-the-result&gt; /some/new/location

How can I do it? Maybe using some bash variable?


**Update:**

To clarify, I don&#39;t want to assign things manually. What I&#39;m after is something like built-in bash variables, e.g.

    ls /tmp
    cd $_

`$_` holds the last argument of the previous command. I want something similar, but with the output of the last command.

**Final update:**

Seth&#39;s answer has worked quite well. Couple of things to bear in mind:

 - don&#39;t forget to `touch /tmp/x` when trying the solution for the very first time
 - the result will only be stored if last command&#39;s exit code was successful

Automatically capture output of last command into a variable using Bash?

I have a variable in my function that is static, but I would like it to be static on a per thread basis.

How can I allocate the memory for my C++ class such that each thread has its own copy of the class instance?

    AnotherClass::threadSpecificAction()
    {
      // How to allocate this with thread local storage?
      static MyClass *instance = new MyClass();

      instance-&gt;doSomething();
    }

This is on Linux.  I&#39;m not using C++0x and this is gcc v3.4.6.

How to allocate thread local storage?

In the `File` class there are two strings, [`separator`][1] and [`pathSeparator`][2].

What&#39;s the difference? When should I use one over the other?

  [1]: http://docs.oracle.com/javase/8/docs/api/java/io/File.html#separator
  [2]: http://docs.oracle.com/javase/8/docs/api/java/io/File.html#pathSeparator

When should I use File.separator and when File.pathSeparator?

I want to build a program that detects if a usb (or two or more) are plugged in 
(and copy all contents to any folder on a hard disk) 

Any ideas? I have this, 

    using System.Runtime.InteropServices;

But it is not the easy way (that I believe). I want something easy.  

I have another idea (if (folder exist) then copy) something -- but there may be a problem with that, and I want a good solution. 

There may also be a tool called SerialPort; can I use it?  If so, how do I use it?

How to detect a USB drive has been plugged in?

Could you tell me how can I read a file that is inside my Python package?

## My situation

A package that I load has a number of templates (text files used as strings) that I want to load from within the program. But how do I specify the path to such file?


Imagine I want to read a file from:

    package\templates\temp_file

Some kind of path manipulation? Package base path tracking?

How to read a (static) file from inside a Python package?

I would like to know what is the value of the Java Virtual Machine (JVM) property to set my file encoding to UTF-8.

Do I put `-Dfile.encoding=UTF8` or `-Dfile.encoding=UTF-8`?


JVM property -Dfile.encoding=UTF8 or UTF-8?

&gt; **Possible Duplicate:**  
&gt; [File to byte\[\] in Java](https://stackoverflow.com/questions/858980/file-to-byte-in-java)  

&lt;!-- End of automatically inserted text --&gt;

I want to read data from file and unmarshal it to Parcel.
In documentation it is not clear, that FileInputStream has method to read all its content. To implement this, I do folowing:

    FileInputStream filein = context.openFileInput(FILENAME);
    

    int read = 0;
    int offset = 0;
    int chunk_size = 1024;
    int total_size = 0;

    ArrayList&lt;byte[]&gt; chunks = new ArrayList&lt;byte[]&gt;();
    chunks.add(new byte[chunk_size]);
    //first I read data from file chunk by chunk
    while ( (read = filein.read(chunks.get(chunks.size()-1), offset, buffer_size)) != -1) {
        total_size+=read;
        if (read == buffer_size) {
             chunks.add(new byte[buffer_size]);
        }
    }
    int index = 0;
    
    // then I create big buffer        
    byte[] rawdata = new byte[total_size];
    
    // then I copy data from every chunk in this buffer
    for (byte [] chunk: chunks) {
        for (byte bt : chunk) {
             index += 0;
             rawdata[index] = bt;
             if (index &gt;= total_size) break;
        }
        if (index&gt;= total_size) break;
    }

    // and clear chunks array
    chunks.clear();

    // finally I can unmarshall this data to Parcel
    Parcel parcel = Parcel.obtain();
    parcel.unmarshall(rawdata,0,rawdata.length);

I think this code looks ugly, and my question is:
How to do read data from file into byte[] beautifully? :)


Elegant way to read file into byte[] array in Java

I have the following in a shell script.  How can I subtract one hour while retaining the formatting?

    DATE=`date &quot;+%m/%d/%Y -%H:%M:%S&quot;`

Subtract 1 hour from date in UNIX shell script

Is there a &quot;canonical&quot; way of doing that? I&#39;ve been using `head -n | tail -1` which does the trick, but I&#39;ve been wondering if there&#39;s a Bash tool that specifically extracts a line (or a range of lines) from a file.

By &quot;canonical&quot; I mean a program whose main function is doing that.


Bash tool to get nth line from a file

I am trying to understand how &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; terminates a child but not a parent process. I see this behavior in some script shells like `bash` where you can start some long-running process and then terminate it by entering &lt;kbd&gt;CTRL&lt;/kbd&gt;-&lt;kbd&gt;C&lt;/kbd&gt; and the control returns to the shell.

Could you explain how does it work and in particular why isn&#39;t the parent (shell) process terminated?

Does the shell have to do some special handling of &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; event and if yes what exactly does it do?

How does Ctrl-C terminate a child process?

I&#39;d like to detect if python is installed on a Linux system and if it is, which python version is installed.

How can I do it? Is there something more graceful than parsing the output of `&quot;python --version&quot;`?

Detect python version in shell script

I normally use `;` to combine more than one command in a line, but some people prefer `&amp;&amp;`. Is there any difference? For example, `cd ~; cd -` and `cd ~ &amp;&amp; cd -` seems to make the same thing. What version is more portable, e.g. will be supported by a bash-subset like Android&#39;s shell or so?

Bash/sh - difference between &amp;&amp; and ;

I&#39;m using DataTables ([datatables.net][1]) and I would like my search box to be outside of the table (for example in my header div).

Is this possible ?


  [1]: http://www.datatables.net

Datatables - Search Box outside datatable

How can I find an index of a certain value in a Java array of type `int`?

I tried using `Arrays.binarySearch` on my unsorted array, it only sometimes gives the correct answer.

How to find the index of an element in an int array?

Just take this code as an example. Pretending it is an HTML/text file, if I would like to know the total number of times that `echo` appears, how can I do it using bash?

    new_user()
    {
        echo &quot;Preparing to add a new user...&quot;
        sleep 2
        adduser     # run the adduser program
    }
    
    echo &quot;1. Add user&quot;
    echo &quot;2. Exit&quot;
    
    echo &quot;Enter your choice: &quot;
    read choice
    
    
    case $choice in
        1) new_user     # call the new_user() function
           ;;
        *) exit
           ;;
    esac 

How can I count the occurrences of a string within a file?

I looked through the MongoDB documentation and googled this question but couldn&#39;t really find a suitable answer. So, here is what I&#39;m looking for. 
Assume I have a collection with elements like this:

    {
       &quot;foo&quot; : &quot;bar&quot;,
       &quot;test&quot; : &quot;test&quot;,
       &quot;key&quot; : &quot;value&quot;,
    }

What I&#39;d like to achieve is find an element by searching in all (maybe except for finitely many ;-) ) fields. In other words: Given a query, I do NOT know in which field the query should be found.

In my thinking something like this 

    db.things.find({_ANY_ : &quot;bar&quot;}) 

would give me the example element.

Thank you for your help.

Searching for value of any field in MongoDB without explicitly naming it

I need to search a multidimensional array for a specific value in any of the indexed subarrays.

In other words, I need to check a single column of the multidimensional array for a value.  If the value exists anywhere in the multidimensional array, I would like to return `true` otherwise `false`

    $my_array = array(    
        0 =&gt;  array(  
            &quot;name&quot;   =&gt; &quot;john&quot;,  
            &quot;id&quot;    =&gt;  4  
        ),  
        1   =&gt;  array(  
            &quot;name&quot; =&gt;  &quot;mark&quot;,  
            &quot;id&quot; =&gt; 152  
        ), 
        2   =&gt;  array(  
            &quot;name&quot; =&gt;  &quot;Eduard&quot;,  
            &quot;id&quot; =&gt; 152  
        )
    );

I would like to know the fastest and most efficient way to check if the array `$my_array` contains a value with the key &quot;id&quot;.  For example, if `id =&gt; 152` anywhere in the multidimensional array, I would like `true`.

Content Type	Original Author	Original Content on Stackoverflow
Question	mike628	View Question on Stackoverflow
Solution 1 - Linux	Mel	View Answer on Stackoverflow
Solution 2 - Linux	jww	View Answer on Stackoverflow
Solution 3 - Linux	Ignacio Vazquez-Abrams	View Answer on Stackoverflow
Solution 4 - Linux	Crayon Violent	View Answer on Stackoverflow
Solution 5 - Linux	A.B.	View Answer on Stackoverflow

Looking for files NOT owned by a specific user

Linux Problem Overview

Linux Solutions

Solution 1 - Linux

Solution 2 - Linux

Solution 3 - Linux

Solution 4 - Linux

Solution 5 - Linux

How to properly create composite primary keys - MYSQL

How to set entire application in portrait mode only?

Attributions