How do you generate a random number in Shell?

To generate a random number using UNIX/Linux shell, there are several methods. The shell maintains a shell variable RANDOM that gives a random number between 0 and 32767 each time it is read….Generating Random Numbers in Linux Shell Scripting

1. Using the Random Variable.
2. Using the shuf Command.
3. Using /dev/random.

How do I generate a random number in bash?

To generate a random integer we can use the internal bash function $RANDOM. This functions returns integer between 0 and 32767. Note : $(((RANDOM00))) will generate integer between 0 and 999.

How does random work in bash?

The random function in bash is called by the magic variable RANDOM. It gives you a more or less random integer between 0 and 32767. Note that unsetting the variable removes the magic for the rest of the shell session.

What is shuf command?

shuf is a command-line utility included in the textutils package of GNU Core Utilities for creating a standard output consisting of random permutations of the input. The version of shuf bundled in GNU coreutils was written by Paul Eggert. It is not a part of POSIX.

How do you randomize a list in Linux?

The shuf command generates random permutations from input lines to standard output. If given a file or series of files it will shuffle the lines and write the result to standard output. It can also limit the number of results returned supporting selecting random lines from a file or data from a list.

How do you create a shell variable in Linux?

In the Bash shell used by Linux, the command is “export”. A shell variable is created with the following syntax: “variable_name=variable_value”. For example, the command “set COMPUTER_NAME=mercury” creates the shell variable named “COMPUTER_NAME” with a value of “mercury”.

How do you assign a value to a variable in shell?

someValue is assigned to given varName and someValue must be on right side of = (equal) sign. If someValue is not given, the variable is assigned the null string.