Command-line Options
The following is a complete list of command-line switches available when launching julia:
| Switch | Description | 
|---|---|
| -v,--version | Display version information | 
| -h,--help | Print command-line options (this message). | 
| --project[={<dir>|@.}] | Set <dir> as the home project/environment. The default @. option will search through parent directories until a Project.toml or JuliaProject.toml file is found. | 
| -J,--sysimage <file> | Start up with the given system image file | 
| -H,--home <dir> | Set location of juliaexecutable | 
| --startup-file={yes|no} | Load ~/.julia/config/startup.jl | 
| --handle-signals={yes|no} | Enable or disable Julia's default signal handlers | 
| --sysimage-native-code={yes|no} | Use native code from system image if available | 
| --compiled-modules={yes|no} | Enable or disable incremental precompilation of modules | 
| -e,--eval <expr> | Evaluate <expr> | 
| -E,--print <expr> | Evaluate <expr>and display the result | 
| -L,--load <file> | Load <file>immediately on all processors | 
| -t,--threads {N|auto} | Enable N threads; autocurrently sets N to the number of local CPU threads but this might change in the future | 
| -p,--procs {N|auto} | Integer value N launches N additional local worker processes; autolaunches as many workers as the number of local CPU threads (logical cores) | 
| --machine-file <file> | Run processes on hosts listed in <file> | 
| -i | Interactive mode; REPL runs and isinteractive()is true | 
| -q,--quiet | Quiet startup: no banner, suppress REPL warnings | 
| --banner={yes|no|auto} | Enable or disable startup banner | 
| --color={yes|no|auto} | Enable or disable color text | 
| --history-file={yes|no} | Load or save history | 
| --depwarn={yes|no|error} | Enable or disable syntax and method deprecation warnings ( errorturns warnings into errors) | 
| --warn-overwrite={yes|no} | Enable or disable method overwrite warnings | 
| -C,--cpu-target <target> | Limit usage of CPU features up to <target>; set tohelpto see the available options | 
| -O,--optimize={0,1,2,3} | Set the optimization level (default level is 2 if unspecified or 3 if used without a level) | 
| --min-optlevel={0,1,2,3} | Set the lower bound on per-module optimization (default is 0) | 
| -g,-g <level> | Enable / Set the level of debug info generation (default level is 1 if unspecified or 2 if used without a level) | 
| --inline={yes|no} | Control whether inlining is permitted, including overriding @inlinedeclarations | 
| --check-bounds={yes|no|auto} | Emit bounds checks always, never, or respect @inbounds declarations | 
| --math-mode={ieee,fast} | Disallow or enable unsafe floating point optimizations (overrides @fastmath declaration) | 
| --code-coverage={none|user|all} | Count executions of source lines | 
| --code-coverage | equivalent to --code-coverage=user | 
| --track-allocation={none|user|all} | Count bytes allocated by each source line | 
| --track-allocation | equivalent to --track-allocation=user | 
In Julia 1.0, the default --project=@. option did not search up from the root directory of a Git repository for the Project.toml file. From Julia 1.1 forward, it does.