If X is 5, it will about a number between 1 and 5 inclusive. This works in bash and zsh. If you want between 0 and 4, remove the +1.
It takes a byte from /dev/random whose source is the kernel entropy pool (better source than other solutions). Show Sample Output
Bash's arithmetic evaluation.
This provides better, but not perfect, distribution, and it works for 2^32 ≤ X ≤ 2^64. (A robust distribution requires iteration/recursion and an indeterminate amount of randomness.)
to test check if given variable is a digit / number Show Sample Output
iterating range of numer with for loop in shell or bash Show Sample Output
"seq" has an additional parameter to use as INCREMENT. # seq FIRST INCREMENT LAST https://linux.die.net/man/1/seq Show Sample Output
2d6 dice:
awk 'BEGIN { srand(); a=int(rand()*6)+1; b=int(rand()*6)+1; print a " + " b " = " a+b }'
3 + 6 = 9
Show Sample Output
This is /bin/sh compatible.
Tail is much faster than sed, awk because it doesn't check for regular expressions. Show Sample Output
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