Comments on Linux shuf Command Tutorial for Beginners (with Examples)
If you ever played the game of cards, you'd likely be aware of the term shuffling. A bit hard to imagine, there's a Linux command line tool that exactly does that with lines in files. In this tutorial, we will discuss the basics of the 'shuf' command using some easy to understand examples.
6 Comment(s)
Comments
You can use the seq command to generate the sequence of number. seq 10 will generate the numbers 1 through 10 which you can pipe to shuf.
Why would you even want to use simple numerical sequences as sample input for <code>shuf</code>, when there is the option -i to accomplish exactly that.
Para GNU 8.26 no acaba de funcionar del todo bien,al realizar dentro de un bash#!/bin/bashvalor=$(shuf -ze -n6 {A..Z} {a..z} {1..9} )me escupe con el texto:AVISO: command substitution: ignored null byte in input.
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For GNU 8.26 it doesn't quite work quite right, when performing within a bash
#!/bin/bash
value = $ (shuf -ze -n6 {A..Z} {a..z} {1..9})
spits me out with the text:
WARNING: command substitution: ignored null byte in input.
Remove the -z option from the command to get rid of the warning.
Just to be sure: does shuf -n 1 file have the same effect as shuf file | head -1 ? It's hard to check empirically ;-)
Yes, the output from these two commands will be the same.