Thanks for you reply, that is what I do. 

However I have to put this juliarc.jl in the net-drive, and moreover, the 
precompile process of a new adding package still locates in the net-drive, 
which is not favorable, too. As the crucial point to me is that I only have 
limited space of the net-drive (....4MB.....)

On Tuesday, March 1, 2016 at 7:44:57 PM UTC+8, Tony Kelman wrote:
>
> You could also put these settings in a juliarc.jl startup file.
>
> On Monday, February 29, 2016 at 7:58:11 PM UTC-8, [email protected] 
> wrote:
>>
>> On Monday, 29 February 2016 17:22:20 UTC+1, James Chen wrote:
>>>
>>> Hi,
>>> I am trying to change Pkg.dir and homedir for Julia permanently, as the 
>>> default installation set them to a net-drive in my Win7. I can use ENV[""] 
>>> = to set them temporarily. However, every time I exit Julia and restart it, 
>>> the Pkg.dir and homedir change back to the default net-drive directory, 
>>> which is really an issue to me. 
>>>
>>> Can anyone help me? Many thanks. 
>>>
>>>
>>>
>> Hi, here are some things that I found out (by trial and error) and then 
>> documented on my homepage (
>> https://sites.google.com/site/paulsoderlindecon/home/software). With 
>> some luck, it helps.
>>
>> If your PC is in a university (or corporate) network, chances are that 
>> your system administrators have set some *windows environment variables* 
>> in a way that creates problems with installing Julia packages (for 
>> instance, by setting HOMEDRIVE to a network drive). If you encounter such 
>> problems, set the environment variable HOME to C:\Users\yourusername 
>> (you find/add it at control panel-system-advanced system 
>> settings-environment variables-user variables). In case that does not 
>> work, try this instead: create  a bat file (say, Julia.bat) containing 
>> three lines (1) set HOMEDRIVE=C: (2) set HOMEPATH=\Users\yourusername 
>> (3) D:\Julia\bin\julia.exe (or wherever it is located). Then run this bat 
>> file to use Julia. In either case, you may have to execute Pkg.init() 
>> before starting do install packages.
>>
>>  
>>
>

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