This post is tested under Julia v1.6.1.
In Julia, you can set a random seed using the Random.seed! function. However, keep in mind that you have to use it every time you are using the random number generator.
julia> using Random
julia> Random.seed!(1234)
MersenneTwister(1234) julia> rand(3)
3-element Vector{Float64}: 0.5908446386657102 0.7667970365022592 0.5662374165061859 …