Author Archives: albertsk

About albertsk

Professor at the University of Hawaii

How to trim a mp4 file in Ubuntu

Posted on January 23, 2021 by albertsk

The following command is to trim “INPUT.mp4” from start time 00:00:00 for a total play duration of 01:33:00, and save it as “OUTPUT.mp4“. No matter what the INPUT.mp4 file size is, this command is done almost immediately.

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How to use GitHub

Posted on January 21, 2021 by albertsk

https://guides.github.com/activities/hello-world/

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LaTex/Lyx customized template store and use

Posted on January 7, 2021 by albertsk
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How to remove “Reference” section name in LaTex

Posted on December 28, 2020 by albertsk
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awk – calculation of sums of rows and columns

Posted on December 20, 2020 by albertsk

awk command in a bash script mydata.dat file

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How to generate a unique directory for each run using Makefile

Posted on December 15, 2020 by albertsk

In command line, one can execute to have 10 different directories in sequence.

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Emacs scroll-step

Posted on December 15, 2020 by albertsk
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elisp functions to change word cases backward in Emacs

Posted on November 29, 2020 by albertsk
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To have a wide equation or content in a two-column document: LaTex and Lyx

Posted on November 8, 2020 by albertsk
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Appendix decoration

Posted on November 8, 2020 by albertsk

Add the following lines at the end of LaTex or Lyx file

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