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sources/share/20151012 What is a good IDE for R on Linux.md
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sources/share/20151012 What is a good IDE for R on Linux.md
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What is a good IDE for R on Linux
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================================================================================
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Some time ago, I covered some of the [best IDEs for C/C++][1] on Linux. Obviously C and C++ are not the only programming languages out there, and it is time to turn to something a bit more specific.
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If you have ever done some statistics, it is possible that you have encountered the [language R][2]. If you have not, I really recommend this open source programming language which is tailored for statistics and data mining. Coming from a coding background, you might be thrown off a bit by the syntax, but hopefully you will get seduced by the speed of its vector operations. In short, try it. And to do so, what better way to start with an IDE? R being a cross platform language, there are a bunch of good IDEs which make data analysis in R far more pleasurable. If you are very attached to a particular editor, there are also some very good plugins to turn that editor into a fully-fledged R IDE.
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Here is a list of five good IDEs for R language in Linux environment.
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### 1. RStudio ###
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Let’s start hard with maybe one of the most popular R IDEs out there: [RStudio][3]. In addition to common IDE features like syntax highlighting and code completion, RStudio stands out for its integration of R documentation, its powerful debugger and its multiple views system. If you start with R, I can only recommend RStudio as the R console on the side is perfect for testing your code in real time, and the object explorer will help you understand what kind of data you are dealing with. Finally, what really conquered me was the integration of the plots visualiser, making it easy to export your graphs as images. On the downside, RStudio lacks the shortcuts and the advanced settings to make it a perfect IDE. Still, with a free version under AGPL license, Linux users have no excuses not to give this IDE a try.
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### 2. Emacs with ESS ###
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In my last post about IDEs, some people were disappointed by the absence of Emacs in my list. My main reason for that is that Emacs is kind of the wild card of IDE: you could place it on any list for any languages. But things are different for [R with the ESS plugin][4]. Emacs Speaks Statistics (ESS) is an amazing plugin which completely changes the way you use the Emacs editor and really fits the needs of R coders. A bit like RStudio which has multiple views, Emacs with ESS displays presents two panels: one with the code and one with an R console, making it easy to test your code in real time and explore the objects. But ESS's real strength is its seamless integration with other Emacs plugins you might have installed and its advanced configuration options. In short, if you like your Emacs shortcuts, you will like to be able to use them in an environment that makes sense for R development. For full disclosure, however, I have heard of and experienced some efficiency issues when dealing with a lot of data in ESS. Nothing too major to be a problem, but just enough have me prefer RStudio.
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### 3. Vim with Vim-R-plugin ###
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Because I do not want to discriminate after talking about Emacs, I also tried the equivalent for Vim: the [Vim-R-plugin][5]. Using the terminal tool called tmux, this plugin makes it possible to have an R console open and code at the same time. But most importantly, it brings syntax highlighting and omni-completion for R objects to Vim. You can also easily access R documentation and browse objects. But once again, the strength comes from its extensive customization capacities and the speed of Vim. If you are tempted by this option, I direct you to the extremely thorough [documentation][6] on installing and setting up your environment.
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### 4. Gedit with RGedit ###
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If neither Emacs or Vim is your cup of tea, and what you like is your default Gnome editor, then [RGedit][7] is made for you: a plugin to code in R from Gedit. Gedit is known to be more powerful than what it looks. With a very large library of plugins, it is possible to do a lot with it. And RGedit is precisely the plugin you need to code in R from Gedit. It comes with the classic syntax highlighting and integration of the R console at the bottom of the screen, but also a bunch of unique features like multiple profiles, code folding, file explorer, and even a GUI wizard to generate code from snippets. Despite my indifference towards Gedit, I have to admit that these features go beyond the basic plugin functionality and really make a difference when you spend a lot of time analyzing data. The only shadow is that the last update is from 2013. I really hope that this project can pick up again.
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### 5. RKWard ###
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Finally, last but not least, [RKWard][8] is an R IDE made for KDE environments. What I love the most about it is its name. But honestly, its package management system and spreadsheet-like data editor come in close second. In addition to that, it includes an easy system for plotting and importing data, and can be extended by plugins. If you are not a fan of the KDE feel, you might be a bit uncomfortable, but if you are, I would really recommend checking it out.
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To conclude, whether you are new to R or not, these IDEs might be useful to you. It does not matter if you prefer something that stands for itself, or a plugin for your favorite editor, I am sure that you will appreciate one of the features these software provide. I am also sure I missed a lot of good IDEs for R, which deserve to be on this list. So since you wrote a lot of very good comments for the post on the IDEs for C/C++, I invite you to do the same here and share your knowledge.
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What do you feel is a good IDE for R on Linux? Please let us know in the comments.
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--------------------------------------------------------------------------------
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via: http://xmodulo.com/good-ide-for-r-on-linux.html
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作者：[Adrien Brochard][a]
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||||
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://xmodulo.com/author/adrien
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[1]:http://xmodulo.com/good-ide-for-c-cpp-linux.html
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[2]:https://www.r-project.org/
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[3]:https://www.rstudio.com/
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[4]:http://ess.r-project.org/
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[5]:http://www.vim.org/scripts/script.php?script_id=2628
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[6]:http://www.lepem.ufc.br/jaa/r-plugin.html
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[7]:http://rgedit.sourceforge.net/
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[8]:https://rkward.kde.org/
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263
sources/tech/20151012 10 Useful Utilities For Linux Users.md
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sources/tech/20151012 10 Useful Utilities For Linux Users.md
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10 Useful Utilities For Linux Users
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================================================================================
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### Introduction ###
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In this tutorial, I have collected 10 useful utility tools for Linux users which will include various network monitoring, system auditing or some another random commands which can help users to enhance their productivity. I hope you will enjoy them.
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#### 1. w ####
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Display who is logged into the system and what process executed by them.
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$w
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for help
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$w -h
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for current user
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$w <username>
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#### 2. nmon ####
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Nmon or nigel’s monitor is a tool which displays performance information of the system.
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$ sudo apt-get install nmon
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----------
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$ nmon
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nmon can dump information related to netwrok, cpu, memory or disk uses.
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**nmon cpu info (press c)**
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**nmon network info (press n)**
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**nman disk info (press d)**
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#### 3. ncdu ####
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A Command utility is a cursor based version of ‘du’, this command is used to analyze disk space occupied by various directories.
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$apt-get install ncdu
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----------
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$ncdu /
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Final output:
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Press n to order by name or press s to order by file size(default).
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#### 4. slurm ####
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A command line utility used for command based network interface bandwidth monitoring, it will display ascii based graphic.
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$ apt-get install slurm
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Examples:
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$ slurm -i <interface>
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----------
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$ slurm -i eth1
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**options**
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- Press **l** to display lx/tx led.
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- press **c** to switch to classic mode.
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- press **r** to refresh screen.
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- press **q** to quit.
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#### 5.findmnt ####
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Findmnt command is used to find mount file systems. It is used to list mount devices and can alos mount or unmount devices as and when required, it comes as a part of util-linux.
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Examples:
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$findmnt
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To get output in list format.
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$ findmnt -l
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List file systems mounted in fstab.
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$ findmnt -s
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List mounted files systems by file type
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$ findmnt -t ext4
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#### 6. dstat ####
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A combined and flexible tool which can be used to monitor memory, process, network or disk space performance, it is a good replacement of ifstat, iostat, dmstat etc.
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$apt-get install dstat
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Examples:
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A detailed info about cpu, hard disk and network.
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$ dstat
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- **-c** cpu
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$ dstat -c
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Some more detailed information about cpu
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$ dstat -cdl -D sda1
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- **-d** disk
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$ dstat -d
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#### 7. saidar ####
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Another cli based system statistics monitoring tool, provide information about disk uses, network, memory, swap etc.
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$ sudo apt-get install saidar
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Examples:
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$ saidar
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Enable colored output
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$ saider -c
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#### 8. ss ####
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ss or socket statistics is a good alternative to netstat it directory gather information from kernel space nad play fast in comparision to the netstat utility.
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Examples:
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List all connections
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$ ss |less
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Greb only tcp traffic
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$ ss -A tcp
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Grab process name and pid
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$ ss -ltp
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|
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#### 9. ccze ####
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A tool that decorate your logs :).
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$ apt-get install ccze
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Examples:
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|
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$ tailf /var/log/syslog | ccze
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|
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|
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List ccze modules:
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$ ccze -l
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Save log as html.
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tailf /var/log/syslog | ccze -h > /home/tux/Desktop/rajneesh.html
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#### 10. ranwhen.py ####
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A python based terminal utility that can be used to display system activities graphically. Details are presented in a very colorful histogram.
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|
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Install python:
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|
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$ sudo apt-add-repository ppa:fkrull/deadsnakes
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|
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Update system:
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|
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$ sudo apt-get update
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|
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Download python:
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|
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$ sudo apt-get install python3.2
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|
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- [Download ranwhen.py][1]
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|
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$ unzip ranwhen-master.zip && cd ranwhen-master
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Run the tool.
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|
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$ python3.2 ranwhen.py
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### Conclusion ###
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These are the less popular, yet important Linux administration tools. They can help user in their day to day activities. In our upcoming articles, we will try to bring some more Admin/user tools.
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Have fun!
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--------------------------------------------------------------------------------
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||||
|
||||
via: http://www.unixmen.com/10-useful-utilities-linux-users/
|
||||
|
||||
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/
|
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[1]:https://github.com/p-e-w/ranwhen/archive/master.zip
|
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81
sources/tech/20151012 How To Use iPhone In Antergos Linux.md
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81
sources/tech/20151012 How To Use iPhone In Antergos Linux.md
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@ -0,0 +1,81 @@
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How To Use iPhone In Antergos Linux
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================================================================================
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Troubles with iPhone and Arch Linux? iPhone and Linux never really go along very well. In this tutorial, I am going to show you how can you use iPhone in Antergos Linux. Since Antergos is based on Arch Linux, the same steps should be applicable to other Arch based Linux distros such as Manjaro Linux.
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|
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So, recently I bought me a brand new iPhone 6S and when I connected it to Antergos Linux to copy some pictures, it was not detected at all. I could see that iPhone was being charged and I had allowed iPhone to ‘trust the computer’ but there was nothing at all detected. I tried to run dmseg but there was no trace of iPhone or Apple there. What is funny that [libimobiledevice][1] was installed as well, which always fixes [iPhone mount issue in Ubuntu][2].
|
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|
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I am going to show you how I am using iPhone 6S, running on iOS 9 in Antergos. It goes more in command line way, but I presume since you are in Arch Linux zone, you are not scared of terminal (and you should not be as well).
|
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|
||||
### Mount iPhone in Arch Linux ###
|
||||
|
||||
**Step 1**: Unplug your iPhone, if it is already plugged in.
|
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|
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**Step 2**: Now, open a terminal and use the following command to install some necessary packages. Don’t worry if they are already installed.
|
||||
|
||||
sudo pacman -Sy ifuse usbmuxd libplist libimobiledevice
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|
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**Step 3**: Once these programs and libraries are installed, reboot your system.
|
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|
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sudo reboot
|
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|
||||
**Step 4**: Make a directory where you want the iPhone to be mounted. I would suggest making a directory named iPhone in your home directory.
|
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|
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mkdir ~/iPhone
|
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|
||||
**Step 5**: Unlock your phone and plug it in. If asked to trust the computer, allow it.
|
||||
|
||||
|
||||
|
||||
**Step 6**: Verify that iPhone is recognized by the system this time.
|
||||
|
||||
dmesg | grep -i iphone
|
||||
|
||||
This should show you some result with iPhone and Apple in it. Something like this:
|
||||
|
||||
[ 31.003392] ipheth 2-1:4.2: Apple iPhone USB Ethernet device attached
|
||||
[ 40.950883] ipheth 2-1:4.2: Apple iPhone USB Ethernet now disconnected
|
||||
[ 47.471897] ipheth 2-1:4.2: Apple iPhone USB Ethernet device attached
|
||||
[ 82.967116] ipheth 2-1:4.2: Apple iPhone USB Ethernet now disconnected
|
||||
[ 106.735932] ipheth 2-1:4.2: Apple iPhone USB Ethernet device attached
|
||||
|
||||
This means that iPhone has been successfully recognized by Antergos/Arch Linux.
|
||||
|
||||
**Step 7**: When everything is set, it’s time to mount the iPhone. Use the command below:
|
||||
|
||||
ifuse ~/iPhone
|
||||
|
||||
Since we created the mount directory in home, it won’t need root access and you should also be able to see it easily in your home directory. If the command is successful, you won’t see any output.
|
||||
|
||||
Go back to Files and see if the iPhone is recognized or not. For me, it looks like this in Antergos:
|
||||
|
||||
|
||||
|
||||
You can access the files in this directory. Copy files from it or to it.
|
||||
|
||||
|
||||
|
||||
**Step 8**: When you want to unmount it, you should use this command:
|
||||
|
||||
sudo umount ~/iPhone
|
||||
|
||||
### Worked for you? ###
|
||||
|
||||
I know that it is not very convenient and ideally, iPhone should be recognized as any other USB storage device but things don’t always behave as they are expected to. Good thing is that a little DIY hack can always fix the issue and it gives a sense of achievement (at least to me). That being said, I must say Antergos should work to fix this issue so that iPhone can be mounted by default.
|
||||
|
||||
Did this trick work for you? If you have questions or suggestions, feel free to drop a comment.
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://itsfoss.com/iphone-antergos-linux/
|
||||
|
||||
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://www.libimobiledevice.org/
|
||||
[2]:http://itsfoss.com/mount-iphone-ipad-ios-7-ubuntu-13-10/
|
||||
@ -0,0 +1,53 @@
|
||||
Linux FAQs with Answers--How to change USB device permission permanently on Linux
|
||||
================================================================================
|
||||
> **Question**: I am trying to run gpsd on my Linux with a USB GPS receiver. However, I am getting the following errors from gpsd.
|
||||
>
|
||||
> gpsd[377]: gpsd:ERROR: read-only device open failed: Permission denied
|
||||
> gpsd[377]: gpsd:ERROR: /dev/ttyUSB0: device activation failed.
|
||||
> gpsd[377]: gpsd:ERROR: device open failed: Permission denied - retrying read-only
|
||||
>
|
||||
> Looks like gpsd does not have permission to access the USB device (/dev/ttyUSB0). How can I change its default permission mode permanently on Linux?
|
||||
|
||||
When you run a process that wants to read or write to a USB device, the user/group of the process must have appropriate permission to do so. Of course you can change the permission of your USB device manually with chmod command, but such manual permission change will be temporary. The USB device will revert to its default permission mode when you reboot your Linux machine.
|
||||
|
||||
|
||||
|
||||
As a permanent solution, you can create a udev-based USB permission rule which assigns any custom permission mode of your choice. Here is how to do it.
|
||||
|
||||
First, you need to identify the vendorID and productID of your USB device. For that, use lsusb command.
|
||||
|
||||
$ lsusb -vvv
|
||||
|
||||
|
||||
|
||||
From the lsusb output, find your USB device's entry, and look for "idVendor" and "idProduct" fields. In this example, we have idVendor (0x067b) and idProduct (0x2303).
|
||||
|
||||
Next, create a new udev rule as follows.
|
||||
|
||||
$ sudo vi /etc/udev/rules.d/50-myusb.rules
|
||||
|
||||
----------
|
||||
|
||||
SUBSYSTEMS=="usb", ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", GROUP="users", MODE="0666"
|
||||
|
||||
Replace "idVendor" and "idProduct" values with your own. **MODE="0666"** indicates the preferred permission of the USB device.
|
||||
|
||||
Now reboot your machine or reload udev rules:
|
||||
|
||||
$ sudo udevadm control --reload
|
||||
|
||||
Then verify the permission of the USB device.
|
||||
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://ask.xmodulo.com/change-usb-device-permission-linux.html
|
||||
|
||||
作者：[Dan Nanni][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://ask.xmodulo.com/author/nanni
|
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@ -0,0 +1,53 @@
|
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Linux FAQs with Answers--How to find information about built-in kernel modules on Linux
|
||||
================================================================================
|
||||
> **Question**: I would like to know what modules are built into the kernel of my Linux system, and what parameters are available in each module. Is there a way to get a list of all built-in kernel modules and device drivers, and find detailed information about them?
|
||||
|
||||
The modern Linux kernel has been growing significantly over the years to support a wide variety of hardware devices, file systems and networking functions. During this time, "loadable kernel modules (LKM)" came into being in order to keep the kernel from getting bloated, while flexibly extending its capabilities and hardware support under different environments, without having to rebuild it.
|
||||
|
||||
The Linux kernel shipped with the latest Linux distributions comes with relatively a small number of "built-in modules", while the rest of hardware-specific drivers or custom capabilities exist as "loadable modules" which you can selectively load or unload.
|
||||
|
||||
The built-in modules are statically compiled into the kernel. Unlike loadable kernel modules which can be dynamically loaded, unloaded, looked up or listed using commands like modprobe, insmod, rmmod, modinfo or lsmod, built-in kernel modules are always loaded in the kernel upon boot-up, and cannot be managed with these commands.
|
||||
|
||||
### Find a List of Built-in Kernel Modules ###
|
||||
|
||||
To get a list of all built-in modules, run the following command.
|
||||
|
||||
$ cat /lib/modules/$(uname -r)/modules.builtin
|
||||
|
||||
|
||||
|
||||
You can also get a hint on what modules are built-in by running:
|
||||
|
||||
|
||||
|
||||
### Find Parameters of Built-in Kernel Modules ###
|
||||
|
||||
Each kernel module, whether it's built-in or loadable, comes with a set of parameters. For loadable kernel modules, the modinfo command will show parameter information about them. However, this command will not work with built-in modules. You will simply get the following error.
|
||||
|
||||
modinfo: ERROR: Module XXXXXX not found.
|
||||
|
||||
If you want to check what parameters are available in a given built-in module, and what their values are, you can instead examine the content in **/sys/module** directory.
|
||||
|
||||
Under /sys/module directory, you will find sub-directories named after existing kernel modules (both built-in and loadable). Then in each module directory, there is a directory named "parameters", which lists all available parameters for the module.
|
||||
|
||||
For example, let's say you want to find out parameters of a built-in module called tcp_cubic (the default TCP implementation of the kernel). Then you can do this:
|
||||
|
||||
$ ls /sys/module/tcp_cubic/parameters
|
||||
|
||||
And check the value of each parameter by reading a corresponding file.
|
||||
|
||||
$ cat /sys/module/tcp_cubic/parameters/tcp_friendliness
|
||||
|
||||
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://ask.xmodulo.com/find-information-builtin-kernel-modules-linux.html
|
||||
|
||||
作者：[Dan Nanni][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://ask.xmodulo.com/author/nanni
|
||||
@ -0,0 +1,54 @@
|
||||
Linux FAQs with Answers--How to force password change at the next login on Linux
|
||||
================================================================================
|
||||
> **Question**: I manage a Linux server for multiple users to share. I have just created a new user account with some default password, and I want the user to change the default password immediately after the first login. Is there a way to force a user to change his/her password at the next login?
|
||||
|
||||
In multi-user Linux environment, it's a standard practice to create user accounts with some random default password. Then after a successful login, a new user can change the default password to his or her own. For security reasons, it is often recommended to "force" users to change the default password after the first login to make sure that the initial one-time password is no longer used.
|
||||
|
||||
Here is **how to force a user to change his or her password on the next login**.
|
||||
|
||||
Every user account in Linux is associated with various password-related configurations and information. For example, it remembers the date of the last password change, the minimum/maximum number of days between password changes, and when to expire the current password, etc.
|
||||
|
||||
A command-line tool called chage can access and adjust password expiration related configurations. You can use this tool to force password change of any user at the next login.
|
||||
|
||||
To view password expiration information of a particular user (e.g., alice), run the following command. Note that you need root privilege only when you are checking password age information of any other user than yourself.
|
||||
|
||||
$ sudo chage -l alice
|
||||
|
||||
|
||||
|
||||
### Force Password Change for a User ###
|
||||
|
||||
If you want to force a user to change his or her password, use the following command.
|
||||
|
||||
$ sudo chage -d0 <user-name>
|
||||
|
||||
Originally the "-d <N>" option is supposed to set the "age" of a password (in terms of the number of days since January 1st, 1970 when the password was last changed). So "-d0" indicates that the password was changed on January 1st, 1970, which essentially expires the current password, and causes it to be changed on the next login.
|
||||
|
||||
Another way to expire the current password is via passwd command.
|
||||
|
||||
$ sudo passwd -e <user-name>
|
||||
|
||||
The above command has the same effect of "chage -d0", making the current password of the user expire immediately.
|
||||
|
||||
Now check the password information of the user again, and you will see:
|
||||
|
||||
|
||||
|
||||
When you log in again, you will be asked to change the password. You will need to verify the current password one more time before the change.
|
||||
|
||||
|
||||
|
||||
To set more comprehensive password policies (e.g., password complexity, reuse prevention), you can use PAM. See [the article][1] for more detail.
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://ask.xmodulo.com/force-password-change-next-login-linux.html
|
||||
|
||||
作者：[Dan Nanni][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://ask.xmodulo.com/author/nanni
|
||||
[1]:http://xmodulo.com/set-password-policy-linux.html
|
||||
Loading…
Reference in New Issue
Block a user