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Asked: 2015-03-21 07:02:17 +0800 CST

why is sudo not working with exported path?

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If not sure if this is close to (or even a duplicate of) Why does sudo not add root's PATH with Ubuntu 12.04?, I'm still posting this question because I didn't understand anything from there, if this is a duplicate, please do not flag it as that, just explain it better than that question, or post another answer in the other question.

I installed ISE from Xilinx. I was advised to export the path, which I did by entering 

echo "PATH=\$PATH:/opt/Xilinx/14.7/ISE_DS/ISE/bin/lin64/" >> ~/.bashrc

then

echo "export PATH" >> ~/.bashrc

That done, I can run then program by entering ise in a terminal, but if I enter sudo ise it won't work. I'm I forgetting something?.

sudo

1 Answers

  1. Best Answer

    sudo overwrites the path for security reasons with a "secure" path. However you can modify this secure path to include your custom folder. Warning: this leaves your computer a bit unprotected. You can follow these steps for edit the secure path.

    • Execute the command sudo visudo for edit /etc/sudoers

    • Find this line (it should be at the start of the file):

      Defaults       secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

    • If do you want to include your custom path here, edit the secure_path variable. It would look like this:

      Defaults       secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/Xilinx/14.7/ISE_DS/ISE/bin/lin64/"

    • If do you want to bypass completely this security measure (not recommended), simply comment out that line. It will allow the $PATH variable to "pass" through the sudo command

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