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Initial conditions : I have defined a function and export it:

myfunction () { echo OK ; }
export -f myfunction

I have a simple bash file :


Test OK with the current user : If I run :


It works :)

Does not work with sudo : But if I run in sudo :

sudo bash

I have the error : ligne2: myfunction : commande introuvable

which means line2: myfunction : command not found


Why my function does not work in sudo ? How it can work in sudo ?

Thank you very much :)

share|improve this question
Does it use your user files? If so, it requires the full path (because otherwise it defaults to /root not /home/username. So instead of referring to Pictures, refer to /home/username/Pictures. – Tim Jul 6 '14 at 18:56
Posting your script would be helpful... – Tim Jul 6 '14 at 19:04
This question was already asked on Superuser (…), StackOverflow, twice (,…), and Unix, 3 times. These are 6 of the first 7 results on Google when I search for sudo preserve environment variables. – trysis Jul 7 '14 at 2:32
In fact, this seems to be the only relevant SE site this question wasn't asked on (properly). It was even (sort of) asked on ServerFault. – trysis Jul 7 '14 at 4:20

For security reasons sudo throws away shell functions and most environment variables before running its child process.

You need to include the definition of myfunction into

share|improve this answer
Is there any other way to share function or alias with sudo ? In my real situation, I have only 1 function myfunction and about 50 script – sangorys Jul 6 '14 at 20:31
Yes @sangorys, there is a switch you can use. I forget what it is at the moment, but when I remember (read: search for it), I will post it. – trysis Jul 7 '14 at 2:25

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