python_tutorials/u03_bash_tutorial.txt at master · lselector/python_tutorials · GitHub

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search Google or YouTube for

    bash tutorial
    bash tutorial for beginners
    bash tutorial pdf

You will find many excellent tutorials, for example:

 - https://linuxconfig.org/bash-scripting-tutorial-for-beginners

 - https://tldp.org/HOWTO/pdf/Bash-Prog-Intro-HOWTO.pdf

 - https://www.kau.edu.sa/files/830/files/60761_linux.pdf


I even have my own tutorials aboud old Bourne shell here:

 - https://levselector.com/unix_shells.html

 - https://levselector.com/unix_sh.html

Videos:

9 min - Vim Basics in 8 Minutes
 - https://www.youtube.com/watch?v=ggSyF1SVFr4

61 min - Vim Tutorial
 - https://www.youtube.com/watch?v=IiwGbcd8S7I

60 min - Derek Banas - Shell Scripting Tutorial - Excellent!
 - https://www.youtube.com/watch?v=hwrnmQumtPw

24 min - Bash Shell Scripting Tutorial For Beginners
 - https://www.youtube.com/watch?v=Zl7npywCB84

32 min - Shell Scripting Crash Course - Beginner Level
 - https://www.youtube.com/watch?v=v-F3YLd6oMw


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command to recusrively go through directory looking for files with extension "txt"
and substitute tabs to 4 spaces

fd -t f -e txt | xargs ggrep -P '\t'| awk -F ':' '{print $1}' | uniq | xargs perl -pi -e 's/\t/    /g;'
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