File modification:

    ls -t

Inode change:

    ls -tc

File access:

    ls -tu

&quot;Newest&quot; one at the bottom:

    ls -tr

None of this is a creation time. Most Unix filesystems don&#39;t support creation timestamps.

Use -t on ls.  e.g:.

    ls -tr

or

    ls -ltr

I have been used &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Shift&lt;/kbd&gt;+&lt;kbd&gt;F&lt;/kbd&gt; to correct indentation but I heard there is another shortcut to do that: &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;I&lt;/kbd&gt;

According a [reference][1] found in google,
&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Shift&lt;/kbd&gt;+&lt;kbd&gt;F&lt;/kbd&gt; is Reformat
and
&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;I&lt;/kbd&gt; is Correct indentation.

Is there any difference between them? or between Reformat and Correct indentation?


  [1]: http://www.allapplabs.com/eclipse/eclipse_shortcuts.htm

Difference between Ctrl+Shift+F and Ctrl+I in Eclipse

I have something like this:

    text = &#39;This text is very very long.&#39;
    replace_words = [&#39;very&#39;,&#39;word&#39;]
   
    for word in replace_words:
        text = text.replace(&#39;very&#39;,&#39;not very&#39;)



I would like to only replace the first &#39;very&#39; or choose which &#39;very&#39; gets overwritten. I&#39;m doing this on much larger amounts of text so I want to control how duplicate words are being replaced.

Replace first occurrence only of a string?

How to sort the files according to the time stamp in unix?
I need to sort the files and also based on time they created.

How to sort the files according to the time stamp in unix?

<p>How to sort the files according to the time stamp in unix?
I need to sort the files and also based on time they created.</p>


I need a single-pass regex for unix grep that contains, say alpha, but does not contain beta.

    grep &#39;alpha&#39; &lt;&gt; | grep -v &#39;beta&#39;

Unix grep regex containing &#39;x&#39; but not containing &#39;y&#39;

I’m trying to count a particular word occurrence in a whole directory. Is this possible?

Say for example there is a directory with 100 files all of whose files may have the word “aaa” in them. How would I count the number of “aaa” in all the files under that directory?

I tried something like:

     zegrep &quot;xception&quot; `find . -name &#39;*auth*application*&#39; | wc -l 

But it’s not working.

How to count occurrences of a word in all the files of a directory?

I am using the following to search a directory recursively for specific string and replace it with another:

    grep -rl oldstr path | xargs sed -i &#39;s/oldstr/newstr/g&#39;

This works okay. The only problem is that if the string doesn&#39;t exist then `sed` fails because it doesn&#39;t get any arguments. This is a problem for me since i&#39;m running this automatically with ANT and the build fails since `sed` fails.

Is there a way to make it fail-proof in case the string is not found?

I&#39;m interested in a one line simple solution I can use (not necessarily with `grep` or `sed` but with common unix commands like these).


Using grep and sed to find and replace a string

I&#39;m on EC2 instance. So there is no GUI.

    $pip install selenium
    $sudo apt-get install firefox xvfb

Then I do this:

    $Xvfb :1 -screen 0 1024x768x24 2&gt;&amp;1 &gt;/dev/null &amp;

    $DISPLAY=:1 java -jar selenium-server-standalone-2.0b3.jar
    05:08:31.227 INFO - Java: Sun Microsystems Inc. 19.0-b09
    05:08:31.229 INFO - OS: Linux 2.6.32-305-ec2 i386
    05:08:31.233 INFO - v2.0 [b3], with Core v2.0 [b3]
    05:08:32.121 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
    05:08:32.122 INFO - Version Jetty/5.1.x
    05:08:32.123 INFO - Started HttpContext[/selenium-server/driver,/selenium-server/driver]
    05:08:32.124 INFO - Started HttpContext[/selenium-server,/selenium-server]
    05:08:32.124 INFO - Started HttpContext[/,/]
    05:08:32.291 INFO - Started org.openqa.jetty.jetty.servlet.ServletHandler@1186fab
    05:08:32.292 INFO - Started HttpContext[/wd,/wd]
    05:08:32.295 INFO - Started SocketListener on 0.0.0.0:4444
    05:08:32.295 INFO - Started org.openqa.jetty.jetty.Server@1ffb8dc


Great, everything should work now, right?

When I run my code:

    from selenium import webdriver
    from selenium.common.exceptions import NoSuchElementException
    from selenium.webdriver.common.keys import Keys
    
    browser = webdriver.Firefox() 
    browser.get(&quot;http://www.yahoo.com&quot;) 

I get this:

    Error: cannot open display: :0




How do I run Selenium in Xvfb?

How can I list all Java processes in bash?
I need an command line. I know there is command `ps` but I don&#39;t know what parameters I need to use.

List of Java processes

Is there a MySQL function which can be used to convert a Unix timestamp into a human readable date? I have one field where I save Unix times and now I want to add another field for human readable dates.

Convert Unix timestamp into human readable date using MySQL

I&#39;m using the Mongo shell to query my Mongo db.  I want to use the timestamp contained in the ObjectID as part of my query and also as a column to extract into output.  I have setup Mongo to create ObjectIDs on its own.

My problem is I can not find out how to work with the ObjectID to extract its timestamp.

Here are the queries I am trying to get working.  The &#39;createdDate&#39; field is a placeholder; not sure what the correct field is:

    //Find everything created since 1/1/2011
    db.myCollection.find({date: {$gt: new Date(2011,1,1)}});
    
    //Find everything and return their createdDates
    db.myCollection.find({},{createdDate:1});

How do I extract the created date out of a Mongo ObjectID

I have an X.509 certificate which has the following 2 timestamps:

    [&#39;validFrom&#39;] = String(13) &quot;120314165227Z&quot;
    [&#39;validTo&#39;]   = String(13) &quot;130314165227Z&quot;

What does the postfix character &#39;Z&#39; mean. Does it specify the timezone?

What does the &#39;Z&#39; mean in Unix timestamp &#39;120314170138Z&#39;?

Using PHP, I want to convert UNIX timestamps to date strings similar to this: `2008-07-17T09:24:17Z`

How do I convert a timestamp such as `1333699439` to `2008-07-17T09:24:17Z`?

Converting a UNIX Timestamp to Formatted Date String

How do I create a Unix timestamp on Android?

I want to create a URL post request with a Unix timestamp on the end of the url.

Content Type	Original Author	Original Content on Stackoverflow
Question	Srihari	View Question on Stackoverflow
Solution 1 - Unix	ninjalj	View Answer on Stackoverflow
Solution 2 - Unix	linuts	View Answer on Stackoverflow

How to sort the files according to the time stamp in unix?

Unix Problem Overview

Unix Solutions

Solution 1 - Unix

Solution 2 - Unix

Replace first occurrence only of a string?

Difference between Ctrl+Shift+F and Ctrl+I in Eclipse

Attributions