20150918-1 选题

sources/tech/20150918 How To Add And Remove Bookmarks In Ubuntu Beginner Tip.md

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+How To Add And Remove Bookmarks In Ubuntu [Beginner Tip]
+================================================================================
+![](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/09/Add-Bookmark.jpg)
+
+In this quick tip for absolute beginners, I am going to show you how to add bookmarks in Ubuntu File manager, Files.
+
+Now, if you wonder why would you do that, the answer is pretty simple. It gives you quick access, right in the left sidebar. For example, I [installed Copy in Ubuntu][1]. Now it has been created in /Home/Copy. Not a big deal to go in Home and then go in Copy directory, but I would like to access it rather quickly. So, I add a bookmark to it so that I would be able to access it from the sidebar.
+
+### Add a bookmark in Ubuntu ###
+
+Open Files. Go to the location which you want to save for quick access. You need to be inside the directory to bookmark it.
+
+Now, you have two ways to do it.
+
+#### Option 1: ####
+
+When you are in Files (file explorer in Ubuntu), look at the top for the global menu. You would see Bookmarks. Click on it and you’ll see the option to add the current location as boomark.
+
+![](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/09/Add-Bookmark-Ubuntu.jpeg)
+
+#### Option 2: ####
+
+You can simply press Ctrl+D and the current location will be added as a bookmark.
+
+As you can see, here is the newly added Copy directory in the left sidebar for quick access:
+
+![](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/09/Add-Bookmark-Ubuntu-1.jpeg)
+
+### Manage Bookmarks ###
+
+If you think you have got too many bookmarks or if you added a bookmark by mistake, you can remove a bookmark easily. Press Ctrl+B to access all the bookmarks. Here, select the desired bookmark and click on – to delete it.
+
+![](http://itsfoss.itsfoss.netdna-cdn.com/wp-content/uploads/2015/09/Remove-bookmark-ubuntu.png)
+
+That’s all you need to do to manage bookmarks in Ubuntu. I know it might be trivial with most of the users, but it might help people who are absolutely new to Ubuntu.
+
+--------------------------------------------------------------------------------
+
+via: http://itsfoss.com/add-remove-bookmarks-ubuntu/
+
+作者：[Abhishek][a]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]:http://itsfoss.com/author/abhishek/
+[1]:http://itsfoss.com/install-copy-in-ubuntu-14-04/

sources/tech/20150918 Install Justniffer In Ubuntu 15.04.md

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+Install Justniffer In Ubuntu 15.04
+================================================================================
+### Introduction ###
+
+[Justniffer][1] is a network protocol analyzer that can be used as alternative to Snort. It is a very popular network analyzer tool, it work interactively to trace/sniff a live network. It can capture traffic from a live environment, support “lipcap” a “tcpdump” file formats. It helps the users to perform analysis in a complex network where it is difficult to capture traffic with wireshark. Specially it help to analyze application layer traffic very significantly and can extract http contents like images, scripts, HTML etc easily. Justsniffer is helpful in understanding how communication occur among different components.
+
+### Features ###
+
+This is the advantage of Justniffer that it collect all traffic from a complex network without affecting system performance, and can save logs for future analysis, some of the important features of Justniffer are:
+
+#### 1. Reliable TCP flow rebuilding ####
+
+It can record and reassemble TCP segments and IP fragments using a portion of host Linux kernel.
+
+#### 2. Logging ####
+
+Log are saved for future analysis and can be customized as and when required.
+
+#### 3. Extensible ####
+
+Can be extended with external  python, perl and bash scripts to get some additional results from analysis reports.
+
+#### 4. Performance Management ####
+
+Retrieve  information on the basis of Connection time, close time, response time or request time etc.
+
+### Installation ###
+
+Justsniffer can be installed with ppa.
+
+To add the repo, run:
+
+    $ sudo add-apt-repository ppa:oreste-notelli/ppa
+
+Update System:
+
+    $ sudo apt-get update
+
+Install Justniffer tool:
+
+    $ sudo apt-get install justniffer
+
+It failed to install in make then i run following command and try to reinstall service
+
+    $ sudo apt-get -f install
+
+### Examples ###
+
+First of all verify installed version of Justniffer with -V option, you will need super user privileges to utilize that tool.
+
+    $ sudo justniffer -V
+
+Sample output:
+
+![j](http://www.unixmen.com/wp-content/uploads/2015/09/j.png)
+
+**1. Dump Traffic to terminal in apache like format for eth1 interface, type**
+
+    $ sudo  justniffer -i eth1
+
+Sample output:
+
+![Selection_001](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0013.png)
+
+**2. You can trace running tcp stream with following option**
+
+    $ sudo  justniffer -i eth1 -r
+
+Sample output:
+
+![Selection_002](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0023.png)
+
+**3. To get the response time of web server, type**
+
+    $ sudo justniffer -i eth1 -a " %response.time"
+
+Sample output:
+
+![Selection_003](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0033.png)
+
+**4. Read a tcpdump captured file with Justniffer**
+
+First, capture traffic with tcpdump.
+
+    $ sudo tcpdump -w /tmp/file.cap -s0 -i eth0
+
+Now access that data with justniffer
+
+    $ justniffer -f file.cap
+
+Sample output:
+
+![Selection_005](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0056.png)
+
+**5. Capture http only data**
+
+    $ sudo justniffer -i eth1 -r -p "port 80 or port 8080"
+
+Sample output:
+
+![Selection_006](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0064.png)
+
+**6.  Get http only data from a specific host**
+
+    $ justniffer -i eth1 -r -p "host 192.168.1.250 and tcp port 80"
+
+Sample output:
+
+![Selection_007](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0074.png)
+
+**7. Capture data in a more preciser format**
+
+When you will type **justniffer -h** You will see a lots of format key words which help to get data in more preciser  way
+
+    $ justniffer -h
+
+Sample Output:
+
+![Selection_008](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0083.png)
+
+Let us retrieve data with some predefined parameter provided with justniffer
+
+    $ justniffer -i eth1 -l "%request.timestamp %request.header.host %request.url %response.time"
+
+Sample Output:
+
+![Selection_009](http://www.unixmen.com/wp-content/uploads/2015/09/Selection_0094.png)
+
+There are lots of option which you can explore.
+
+### Conclusion ###
+
+Justniffer is a very nice tool for network testing. In my view users who are using Snort for network sniffing will know justniffer as an less complicated tool. It is provided with a lots of  **FORMAT KEYWORDS** which are very helpful to retrieve data in specific formats as per your need. You can log your network in .cap file formats which can be analyzed later on to monitor network service performance.
+
+**Reference:**
+
+- [Justniffer website][2]
+
+--------------------------------------------------------------------------------
+
+via: http://www.unixmen.com/install-justniffer-ubuntu-15-04/
+
+作者：[Rajneesh Upadhyay][a]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]:http://www.unixmen.com/author/rajneesh/
+[1]:http://sourceforge.net/projects/justniffer/?source=directory
+[2]:http://justniffer.sourceforge.net/