awk command tutorial in linux/unix with examples and use cases
linux awk tutorial: syntax, options, workflow, built-in variables, built-in functions, custom functions, conditional judgment, and usage examples....
linux find command tutorial: find syntax and examples
linux find – search for files in a directory hierarchy. syntax examples use find command – find file find – type filter explanation where x...
AWK tutorial: awk save to file
AWK save to file AWK append to file...
Awk tutorial: awk man
awk man...
AWK tutorial: awk newline character
How to use Awk print out a newline character in a string ？？？...
AWK tutorial: awk workflow
AWK follows a simple workflow − Read, Execute, and Repeat. BODY block This block is the core of the awk command. It consists of three...
ffmpeg video to image
- specify video time interception image - Output one image every second - Output one image every minute - use the select filter for a set of custom...
a mini parrotfish play
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awk if else and nested if else statements with examples
Awk if else condition judgment statement is to provide command branch control, awk if else syntax: if(condition) { action 1 } else { action...
fmpeg -filter_complex move image
- Image move from bottom to top in videos
- Video with image in the middle
- Start zooming in the middle of the picture - Using ffmpeg...
How does my website get flow ???
Content ？ Valuable original content？ SEO？ Wordpress SEO optimization ？ ...... ...
Why 0.1+0.2=0.30000000000000004(floating point number addition)
From the how-to-store-numbers-in-javascript, we know that Now we get 0.2 by the same way, Now we operate by the following steps:...
How to store numbers in Javascript
We know that all numbers in Javascript are stored in 64-bit format IEEE-754, also known as “double precision”,whatever the types int or float. When you...
Facing the Sea With Spring Blossoms
From tomorrow on,I will be a happy man.
Grooming,chopping and traveling all over the world.
From tomorrow on,I will care foodstuff and vegetable.
Living in a house towards...
awk system batch operation
1. use awk command batch creation of files
awk 'BEGIN {do {++i; system("touch file_num_" i "_test") } while (i<9) }' .........