# See startup options within Julia
**URL:** https://discourse.julialang.org/t/see-startup-options-within-julia/62901
**Category:** General Usage
**Created:** [June 14, 2021, 5:53pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901 "2021-06-14T17:53:13Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@jlchan](https://discourse.julialang.org/u/jlchan)
#### Post date: [June 14, 2021, 5:53pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/1 "2021-06-14T17:53:13Z")
Is there a way to list the command line options (e.g., `-p 10`, `--optimize=1`, etc) used to start Julia from within the REPL?
---
### Author:  [@fredrikekre](https://discourse.julialang.org/u/fredrikekre)
#### Post date: [June 14, 2021, 6:05pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/2 "2021-06-14T18:05:32Z")
All options are stored in the struct `Base.JLOptions()`.
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### Author:  [@jlchan](https://discourse.julialang.org/u/jlchan)
#### Post date: [June 14, 2021, 6:06pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/3 "2021-06-14T18:06:25Z")
> [@fredrikekre](#):
>
> `Base.JLOptions()` .
Thank you!
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### Author:  [@lungben](https://discourse.julialang.org/u/lungben)
#### Post date: [June 14, 2021, 8:03pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/4 "2021-06-14T20:03:34Z")
```julia
julia --help
```
---
### Author:  [@jlchan](https://discourse.julialang.org/u/jlchan)
#### Post date: [June 14, 2021, 8:15pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/5 "2021-06-14T20:15:32Z")
I can’t do that from within the REPL.
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### Author:  [@lungben](https://discourse.julialang.org/u/lungben)
#### Post date: [June 14, 2021, 8:24pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/6 "2021-06-14T20:24:59Z")
Right - but you can do
```julia
run(`julia --help`)
```
---
### Author:  [@jlchan](https://discourse.julialang.org/u/jlchan)
#### Post date: [June 14, 2021, 8:31pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/7 "2021-06-14T20:31:05Z")
Hm - that’s giving me errors:
```julia
julia> run(`julia --help`)
ERROR: IOError: could not spawn `julia --help`: no such file or directory (ENOENT)
```
---
### Author:  [@lungben](https://discourse.julialang.org/u/lungben)
#### Post date: [June 14, 2021, 8:38pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/8 "2021-06-14T20:38:05Z")
Strange, it works for me. Is julia in your PATH?
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### Author:  [@jlchan](https://discourse.julialang.org/u/jlchan)
#### Post date: [June 14, 2021, 8:49pm UTC](https://discourse.julialang.org/t/see-startup-options-within-julia/62901/9 "2021-06-14T20:49:39Z")
Ah, it might not be. I think that’s by default on MacOS