Linux do some cool things or funny things

1. File randomizer

This project came to my mind when I was trying to burn some music for my car. The car did not have the ability to shuffle play so I decided to randomize the file order. But the default burning tool did not have an option to shuffle files before burning, so I decided to make this small script. This is the full script:

#!/bin/bash 
num_files=$(ls | wc -l) 
pad=$(echo "l($num_files)/l(10) + 1" | bc -l) 
pad=${pad%.*} 

counter=0 
ls -A | shuf | while read filename; do num=$(printf "%0${pad}d" $counter); mv "$filename" "$num - $filename"; counter=$(($counter+1)); done;

1. funny terminal

• The fortune | cowsay is quite known. But to spice things up, use
  lolcat

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• Other things quite famous are figlet and toilet

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• Espeak is a text-to-speech programe

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• nyancat(gif)
  

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• vtop is another nice command (install via npm) This uses braille characters to make the plot!
  

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• cmatrix
  

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• Install sl, so when you misspel ls, you get this: (gif)
  

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• Install filters to have
  

- easy terminal

• remove empty directories

find -type d -empty -exec rm {} \; # remove empty directories

• convert bases to other bases

echo "obase=16;ibase=10;500000" | bc

• find the years in which 21 november is a friday

for y in {1970..2010} ; do date -d $y-11-21 +%u-%Y ; done | grep -P "(?<=5-).*"

• find out how many files sit in a directory

ls -l | wc -l

• get a list of the ASCII files in the directory

file * | grep ASCII | awk -F: {'print $1'}

• create a hexdump

cat file | hexdump -c