How to use the shuf command in Linux

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The Linux common command shuf command is used to output input lines to standard output in random order.

Syntax format shuf [options]... [file] or: shuf-e [option]. [parameter]. Or: shuf-I LO-HI [option]. Parameter-e,-- echo treats each parameter as input line-I,-- input-range=LO-HI treats each number from LO to HI as input line-n,-- head-count= lines up to output the specified number of lines-o,-- output= file outputs the result to the specified file instead of standard output-- the random-source= file gets random bits-z from the specified file. -- zero-terminated ends line with 0 instead of new line-- help displays this help and exits-- version displays version information and exits if no file is specified Or if the file is "-", it is read from standard input. Example 1

[tank@localhost test1] # cat 1.txt # ordered 1 2 3 4 5 6 [tank@localhost test1] # shuf 1.txt # disordered 6 2 3 5 4 1 cases 2

[root@pf] # shuf-e 1 2 3 4 5 6 1 2 6 4 3 5 [root@pf] # shuf-I 1-6 6 5 4 2 3 1 [root@pf] # shuf-N3-I 1-6 4 51 [root@pf] # shuf-N3-I 1-6-o out.txt [root@pf] # cat out.txt 546 cases 3

Let me share an example of simulating a two-color ball with a shuf command: # define an array of red balls and basketball. # RED= `seq 16` # BLUE= `seq 33` # one ball is randomly selected from the red ball array. # echo "Red Ball:"; echo "${RED [@]}" | shuf-N1 # does not put back and extract 6 balls in the basketball array # echo "Blue Ball:"; echo "${BLUE [@]}" | shuf-n6 is all the contents of the article "how to use the shuf command in Linux". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!