SysTut

Reading JSON from URL in R

Fri, 06 Nov 2020 14:43:34 GMT

R is good at analyzing data. Many data are provided as JSON from RESTful APIs with an URL. R natively support many data format. For JSON, we can use some libraries. For reading JSON from URL, we can use the "jsonlite" package. In this example, we use an example of fetching BTC prices of last […]

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Reading Excel xls/xlsx Files in R

Sun, 01 Nov 2020 09:30:03 GMT

Many useful data are stored in Excel xls or xlsx format. R is good at doing analysis on top of data. We would then importing the data to R by reading the xls/xlsx files in R. In this post, we check how to import data from Excel files to R programs. The package we will […]

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3 Ways of .odt to .txt File Conversion in Command Line in Linux

Sun, 01 Nov 2020 07:35:51 GMT

The Open Document .odt files can contain rich formats for the content. However, some times a plain text file is more handy. We may convert .odt files to plain text files for such needs. In this post, we discuss 3 ways of how to convert .odt files to .text files in command line in Linux. […]

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.docx/.doc to .odt File Conversion in Command Line in Linux

Sun, 01 Nov 2020 07:22:32 GMT

Word .docx and .doc files are common for documents commonly generated by MS Word software. We would like to convert them to the more open ODF Open Document .odt files for various cases. This can be done by GUI software tools. If we have a set of many .docx/.doc files, it will be handy if […]

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Configure Eclipse to Show Git Revision Information in Editor

Sat, 31 Oct 2020 11:26:09 GMT

Eclipse can work well with Git. We discussed Configuring Eclipse to Highlight Changed Lines Compared to Git Commit before. Eclipse can also show the revision information for lines of code (from git blame) which is useful to understand why some lines are added in the context of previous revisions including the lines of code. Eclipse […]

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Modify macOS Keyboard’s Right Option to Control for Mac Pro

Mon, 26 Oct 2020 12:01:13 GMT

For heavy Terminal/Shell/command line users, the Control key is a very frequently used key. However, in Mac Pro keyboard, there is only a single left Control key for some models. This cause quite some inconvenience. In this post, we will go through how to configure/remap the keys to "create" a right Control key. Remap keys […]

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Convert Hex to ASCII Using xxd

Mon, 26 Oct 2020 10:58:39 GMT

Strings are commonly encoded as hexadecimal (hex) strings for various purposes. Hence, it is also common to convert hex strings to its original strings such as an ASCII string. Hex to ASCII string conversion can be done programmatically in many languages. In command line, we can use xxd to convert hex to ASCII string. This […]

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Release Notes For Linux v2.0

Sun, 25 Oct 2020 15:07:39 GMT

This is the release notes for linux release v2.0 (source code: linux-2.0.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines/formatting marks. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. Intro This document contains a list of […]

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Release Notes For Linux v1.0

Sun, 25 Oct 2020 14:43:03 GMT

This is the release notes for linux release v1.0 (source code: linux-1.0.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. CHANGES since 0.99 patchlevel 15: removed all the […]

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Release Notes For Linux v0.97

Sun, 25 Oct 2020 09:09:21 GMT

This is the release notes for linux release v0.97 with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. Changes in 0.97: The VESA-support was removed. I’d be happy to […]

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Release Notes For Linux v0.95a

Sun, 25 Oct 2020 08:58:53 GMT

This is the release notes for linux release v0.95a (source code: linux-0.95a.tar.gz with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The the formatted version of the referenced RELNOTES-0.95 can be found at Release Notes For Linux v0.95. The original ASCII […]

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Release Notes For Linux v0.95

Sun, 25 Oct 2020 08:00:33 GMT

This is the release notes for linux release v0.95 (source code: linux-0.95.tar.gz with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. RELEASE NOTES FOR LINUX v0.95 Linus Torvalds, March […]

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Release Notes For Linux v0.12

Sun, 25 Oct 2020 06:59:35 GMT

This is the notes for linux release 0.12 with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the very initial development of the Linux kernel. Also check Notes for linux release 0.01. The original ASCII formatted version is at the end of this post. RELEASE NOTES FOR LINUX […]

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Notes for linux release 0.01

Sun, 25 Oct 2020 05:12:39 GMT

This is the notes for linux release 0.01 with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of whether the Linux kernel started with its very first release. The original ASCII formatted version is at the end of this post. Notes for linux release 0.01 0. Contents of this […]

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Linux Kernel 5.4.72 Release

Sat, 24 Oct 2020 14:29:21 GMT

This post summarizes Linux Kernel new features, bugfixes and changes in Linux 5.4.72 Release. Linux 5.4.72 Release contains 23 changes, patches or new features. In total, there are 126,508 lines of Linux source code changed/added in Linux 5.4.72 release compared to Linux 5.4 release. To view the source code of Linux 5.4.72 kernel release online, […]

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How to Make Eclipse to Highlight Changed Lines Compared to Git Commit

Sat, 24 Oct 2020 13:53:23 GMT

Eclipse is one of the good IDEs for C/C++ projects with its great source code indexer. It is common the source code version is controlled by some tools like Git for software projects. It is convenient if the IDE can show the current changes compared to the committed code version. In this post, we will […]

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How to Generate RSA Private and Public Key Pair in Go Lang?

Sat, 24 Oct 2020 09:27:59 GMT

How to generate a pair of RSA private and public key in Go lang? Go lang has a rich set of standard libraries. Using Go’s standard libraries, we can generate RSA private and Public keys. The Crypto standard libraries in Go lang Go lang standard libraries has a rich set of cryptography functions. Here are […]

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How to Print Google Doc with Comments in Page Margins

Sun, 18 Oct 2020 10:07:02 GMT

Google Doc documents support comments which is useful for collaborative editing of files with comments to each others. But when we print the document from Google Doc, the comments are not included. How to print the document with comments in page margins? In this post, we will introduce a method using the opensource and free […]

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Linux Kernel: Add support for using a MAX3421E chip as a host driver

Sun, 18 Oct 2020 04:49:29 GMT

This change "Add support for using a MAX3421E chip as a host driver." (commit 2d53139) in Linux kernel is authored by David Mosberger <davidm [at] egauge.net> on Mon Apr 28 22:14:07 2014 -0600. Description of "Add support for using a MAX3421E chip as a host driver." The change "Add support for using a MAX3421E chip […]

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How to Print Comments in Page Margins in LibreOffice

Sun, 18 Oct 2020 00:20:46 GMT

"Comments" and "tracking changes" are nice features of the opensource LibreOffice software (and other Office software) to add comments and track changes in documents. OpenDocument ODT and MS Word DOCX/DOC file formats all support comments and change trackings. When we print the documents, how to print the comments in the page margins too in LibreOffice? […]

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