How do I remove Permission denied @ rb_sysopen - Gem install error?

Question

I am trying to install create a new app in Ruby on Rails and I cannot get passed this error:

$ gem install pg

ERROR: While executing gem ... (Errno::EACCES) Permission denied @ rb_sysopen - /Users/stormyramsey/.rbenv/versions/2.3.2/lib/ruby/gems/2.3.0/gems/pg-0.21.0/.gemtest

@SebastiánPalma: `sudo` ought to be unnecessary if the goal is to install the gem under ~/.rbenv. Unless I'm missing something. — Kathryn, Jun 27 '17 at 02:58
@StormyRamsey, Who owns `/stormyramsey/.rbenv/`? Is it the `root` user? — progfan, Jun 27 '17 at 03:53

Bryan Norden · Answer 1 · 2020-04-20T23:27:42.217

53

Its a permissions issue. You could fix it with this:

sudo chown -R $(whoami) /Library/Ruby/Gems/*

or possibly in your case

sudo chown -R $(whoami) /Users/stormyramsey/.rbenv/versions/2.3.2/lib/ruby/gems/*

What does this do:

This is telling the system to change the files to change the ownership to the current user. Something must have gotten messed up when something got installed. Usually this is because there are multiple accounts or users are using sudo to install when they should not always have to.

edited Apr 20 '20 at 23:27

answered May 04 '18 at 18:33

Bryan Norden

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could you explain what exactly is the issue? – Mar 28 '20 at 05:59
Updated my answer with the explanation – Bryan Norden Apr 20 '20 at 23:28

score 9 · Answer 2 · answered Jun 27 '17 at 02:55

It's likely there's a permissions problem somewhere along the .rbenv path. You might try turning on write privileges for your user with:

$ chmod -R +w ~/.rbenv

That will recursively (-R) change the file mode (chmod) to write permission (+w) for all files and directories under your user's .rbenv path. There's no particular reason for not having files set to write.

score 7 · Answer 3 · answered Jan 25 '23 at 03:15

7

No need to change permission, just export GEM_HOME:

export GEM_HOME="$HOME/.gem"

answered Jan 25 '23 at 03:15

DevB2F

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@Stormy Ramsey, please, if you agree, this answer should be labeled as the one that solved the issue. – aerijman Aug 15 '23 at 02:08

score 2 · Answer 4 · edited Oct 05 '21 at 07:34

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Delete the pod folder, reinstall it again. If it doesn't work use this command:

sudo pod install --allow-root

edited Oct 05 '21 at 07:34

S.B

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answered Oct 04 '21 at 12:41

Mohammed alsheikh

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This flag is very risky, avoid at all cost. – dod_basim Jan 20 '23 at 15:35

score 2 · Answer 5 · answered Dec 05 '21 at 04:19

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For Mac M1 systems try,

Allowing full disk access to terminal.

Apple->systemPreferences->Security&Privacy->privacy(Tab)->'+' button, check in Terminal application. Then Restart terminal 2.Try using,

sudo chflags noschg

answered Dec 05 '21 at 04:19

Kewin V

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Thanks. PS - You forgot after the `privacy(tab)` to click `Full Disk Access` on the left – Tomer Gal Sep 16 '22 at 08:19

score 0 · Answer 6 · answered Sep 15 '22 at 16:12

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It really doesn't matter on mac how you configure your eyaml create the dir and config manually, add some public key location to it, and its works just fine after adding full disk access to the terminal as Kewin suggested ^ ^. Thumbs up.

answered Sep 15 '22 at 16:12

Christiyan

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score -1 · Answer 7 · answered Nov 17 '22 at 03:39

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please run:

sudo gem install pg

answered Nov 17 '22 at 03:39

gshoanganh

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How do I remove Permission denied @ rb_sysopen - Gem install error?

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