Ubuntu – Read / Write permissions in /opt directory

android-studiopermissionsread-onlyroot

I installed Android Studio in my /opt directory without a hitch and have been using it. Recently, though, Android Studio informed me of an update. It won't perform the update, however, because it says it doesn't have Read / Write permissions in the opt directory where it's installed.

Can anyone recommend the best remedy for this situation? I would prefer not to move my installation to another directory. I also don't know that I want to change permissions on the directory, though I might be tempted to do so for the update, then revert it back.

Error message:

Studio does not have write access to /opt/android-studio. Please run it by a privileged user to update

Best Answer

I changed the owner of the android studio directory from root to my user account and it worked. Here is the command, where $USER will change by itself to your current active user:

sudo chown -R $USER:$USER /opt/android-studio

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You could try to use POSIX ACL (access control lists), that allow to set ad hoc permissions for additional users and groups (other than owner user and owner group), and furthermore allow to set default permissions for new object created in a directory.

To this end you could use at least two alternatives:

the package acl for command line tools (getfacl, setfacl, chacl),
the package eiciel that provide both a GUI interface

and the possibility to change ACL directly from Nautilus (right click on an object, then Properties, then Access Control List tab).

Is also provide some brief but meaningful help pages.

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To fix it and conquer back all files in your home directory, run

sudo chown -R $USER: ~

And for the future:

Do not run GUI applications with sudo, but use for example gksu or at least sudo -i or sudo -H to prevent it from taking ownership of files in your home directory.

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