What is the Future of Big Data Analytics and Hadoop?

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Big Data has taken a lead in the IT industry and has played a significant role in the Business growth and decision-making processes that gives you an edge over the competitors. This is equally applicable to the organizations as well as professionals existing in the analytics domain. Big Data Analytics bring an ocean of opportunities
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How to synchronize Google Drive and Google Docs files in Ubuntu/Debian/Mint Linux using Insync

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Google Drive is a nice cloud storage service. It provides a suite of nice online document spreadsheet and slide editors Google Docs, Google Sheets and Google Slides. The collaborative editing and full history tracking features of Google Docs are excellent. Google Drive gives 16GB free storage which is pretty much larger compared to other free
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How to get the highest temperature from all sensors in a server on Linux?

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It is useful to monitor a server node’s temporary. Among all the sensors’ temperatures, the higher one may be a very important one. How to get the highest temperature from all sensors in a server on Linux? You can use this command to get the the highest temperature from all sensors in a server on
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How to get the CPU temperatur in command linux on Linux?

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Most modern servers or computers have sensors to detect the temperature of various components. On Linux, how to get the CPU core temperatur in command linux? First, make sure the package “lm-sensors” is installed on your Linux and the command sensors works for you. Then, you can use this piece of script to get the
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How to manually kill HDFS DataNodes?

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stop-dfs.sh report that there are no datanodes running on some nodes like hdfs-node-000208: no datanode to stop However, there are DataNode process running there. How to clean these processes on many (100s) of nodes? You may use this piece of bash script: for i in `cat hadoop/etc/hadoop/slaves`; do echo $i; ssh $i ‘jps | grep
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How to force a USB 3.0 port to work in USB 2.0 mode in Linux?

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We know that we can disable USB 3.0 in the BIOS. But is there a way to force a USB 3.0 port to work in USB 2.0 mode inside of a running Linux? On Linux on some platforms booted in BIOS modes, you can use the following command to force USB 2.0 modes for your
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How to exclude last N columns in Bash on Linux?

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How to exclude last N columns of a string in bash? The point is that the number of columns in each line is uncertain (but > N). For example, I would like to remove the last 2 columns separated by ‘.’ in the following lines. systemd.3.gz systemd.mount.3.gz systemd.mount.f.3.gz The simple cut command cut -d’.’ -f1
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How to sort a file by hexadecimal numbers on Linux using sort command?

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The sort command has a -n option to sort a file by numbers. However, it does not work with hexadecimal numbers. For example, this file: 400000000 __crt0 400000039 __newr0 400001B14 get_my_task_id 400001C14 get_new_task_id 400001582 input_char 40000166E input_q 400001A5D input_q_exit 400002002 main 4000000DB output_char 400001134 output_char_str 40000100C output_id 40000018F output_q 400000614 output_q_digits 400000B7E output_q_hex 400000D3E output_q_hex_j1
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How to `cut` a String Using a String as the Delimiter in Bash?

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Is is possible to cut in Linux using a string as the delimiter? cut –delimiter=”delim” -f 1,3 cut reports: cut: the delimiter must be a single character The most closest solution that I find is using awk/gawk: awk -F ‘delim’ ‘{print $1; print $3}’ From the manual: -F fs –field-separator fs Use fs for the
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utop key bindings / key shortcuts

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utop is an improved toplevel for OCaml supporting line edition, history, real-time and context sensitive completion, colors and etc. utop is convenient to use. However, the key bindings are a little bit different from the ones with GNU readline. What are all the key bindings? The #utop_bindings command will print all the key bindings. Here
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How to Install Wine 32-bit on CentOS 7

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Since version 7, RHEL has only x86-64 versions. The same thing happens to CentOS 7. In CentOS 7/EPEL, there is only package for Wine x86-64. However, many Windows .exe files are 32-bit. Even there are 64-bit versions for some software, their installation file is 32-bit. And for some certain software such as Office 2007, 32-bit
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How to Disable and Enable Laptop Keyboard for X.org Server in Linux

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Attaching a USB keyboard to a laptop is common when using a laptop because a normal keyboard may provide a more convenient typing experience. The laptop keyboard is not used in these situations. However, the laptop keyboard may still be touched by accident. In this post, we will discuss how to disable and enable the
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Accelerating WordPress with WP Super Cache, Opcache and Autoptimize

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WordPress can be very fast after some effort on performance optimization with the help from its plenty of plugins. Possible ways include using cache to cut down the number of database queries, improves HTML/JavaScript/CSS code, and optimizing PHP’s performance with opcode cache. In this post, we introduce how to speed up WordPress with OPcache, page
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How to Set Default Entry in Grub2 and Grub

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Linux booting is usually controlled by Grub or the new Grub2. Setting the default booting entry is a frequent operations. Here, we introduce how to set the default entry in Grub2 and Grub. Setting the default booting entry in grub2 Note1: With some version of grub2, the grub2-set-default method and the script below may not
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