# Unable to install Elasticsearch - problem with public key **URL:** \ **Category:** Elasticsearch\ **Created:** [October 31, 2018, 6:12pm UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907 "2018-10-31T18:12:59Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![khalid\_iqbal](https://avatars.discourse-cdn.com/v4/letter/k/439d5e/32.png) [@khalid\_iqbal](https://discuss.elastic.co/u/khalid_iqbal)\ **Post date:** [October 31, 2018, 6:12pm UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907/1 "2018-10-31T18:12:59Z")
Dear Elastic Community, I installed Ubuntu on my PC through virtual Box and I am trying to install / explore Elastic. When in entered following command: sudo apt-get update && sudo apt-get install elasticsearch I got this error “ \*\*r:3 [http://cdn-fastly.deb.debian.org/debian](http://cdn-fastly.deb.debian.org/debian) jessie-backports InRelease The following signatures couldn't be verified because the public key is not available: NO\_PUBKEY 8B48AD6246925553 NO\_PUBKEY 7638D0442B90D010 ” By doing some search, I found that it could be solved by executing these two commands: **gpg --keyserver pgpkeys.mit.edu --recv-key 8B48AD6246925553** **gpg -a --export 8B48AD6246925553 | apt-key add –** unfortunately, I cannot execute the second command as I am getting an error message although I added SUDO in the beginning WARNING: unsafe ownership on homedir '/home/khalid/.gnupg' E: This command can only be used by root. Thank you in advance for your help Khalid ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [October 31, 2018, 8:15pm UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907/2 "2018-10-31T20:15:17Z")
What documentation did you follow for installation of Elasticsearch? You should be using [https://www.elastic.co/guide/en/elasticsearch/reference/6.4/deb.html](https://www.elastic.co/guide/en/elasticsearch/reference/6.4/deb.html) ---
**Author:** ![khalid\_iqbal](https://avatars.discourse-cdn.com/v4/letter/k/439d5e/32.png) [@khalid\_iqbal](https://discuss.elastic.co/u/khalid_iqbal)\ **Post date:** [November 1, 2018, 11:11am UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907/3 "2018-11-01T11:11:06Z")
hello Warklom than you for your answer. i followed official user guide on elastic website. i executed following instruction : wget -qO - [https://artifacts.elastic.co/GPG-KEY-elasticsearch](https://artifacts.elastic.co/GPG-KEY-elasticsearch) | sudo apt-key add - sudo apt-get install apt-transport-https echo "deb [https://artifacts.elastic.co/packages/6.x/apt](https://artifacts.elastic.co/packages/6.x/apt) stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-6.x.list sudo apt-get update && sudo apt-get install elasticsearch this the complete message that i got : Get:1 [http://security.ubuntu.com/ubuntu](http://security.ubuntu.com/ubuntu) bionic-security InRelease [83,2 kB] Hit:2 [http://fr.archive.ubuntu.com/ubuntu](http://fr.archive.ubuntu.com/ubuntu) bionic InRelease Hit:3 [http://fr.archive.ubuntu.com/ubuntu](http://fr.archive.ubuntu.com/ubuntu) bionic-updates InRelease Get:4 [http://fr.archive.ubuntu.com/ubuntu](http://fr.archive.ubuntu.com/ubuntu) bionic-backports InRelease [74,6 kB] Get:5 [http://cdn-fastly.deb.debian.org/debian](http://cdn-fastly.deb.debian.org/debian) jessie-backports InRelease [166 kB] Ign:6 [https://artifacts.elastic.co/packages/6.x/apt](https://artifacts.elastic.co/packages/6.x/apt) stable InRelease Err:5 [http://cdn-fastly.deb.debian.org/debian](http://cdn-fastly.deb.debian.org/debian) jessie-backports InRelease The following signatures couldn't be verified because the public key is not available: NO\_PUBKEY 8B48AD6246925553 NO\_PUBKEY 7638D0442B90D010 Ign:7 [https://artifacts.elastic.co/packages/6.x/apt](https://artifacts.elastic.co/packages/6.x/apt) 6 InRelease Hit:8 [https://artifacts.elastic.co/packages/6.x/apt](https://artifacts.elastic.co/packages/6.x/apt) stable Release Err:10 [https://artifacts.elastic.co/packages/6.x/apt](https://artifacts.elastic.co/packages/6.x/apt) 6 Release 404 Not Found [IP: 184.73.245.233 443] Reading package lists... Done N: Ignoring file 'elastic.lis' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension W: GPG error: [http://cdn-fastly.deb.debian.org/debian](http://cdn-fastly.deb.debian.org/debian) jessie-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO\_PUBKEY 8B48AD6246925553 NO\_PUBKEY 7638D0442B90D010 E: The repository '[http://http.debian.net/debian](http://http.debian.net/debian) jessie-backports InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/elastic-6.x.list:1 and /etc/apt/sources.list.d/elastic-6.x.list:2 W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/elastic-6.x.list:1 and /etc/apt/sources.list.d/elastic-6.x.list:2 W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/elastic-6.x.list:1 and /etc/apt/sources.list.d/elastic-6.x.list:2 ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [November 1, 2018, 7:07pm UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907/4 "2018-11-01T19:07:42Z")
> [@khalid\_iqbal](#): > > W: GPG error: [Index of /debian](http://cdn-fastly.deb.debian.org/debian) jessie-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO\_PUBKEY 8B48AD6246925553 NO\_PUBKEY 7638D0442B90D010 This does not relate to our repo. You may want to check with one of the Debian forums. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 29, 2018, 7:07pm UTC](https://discuss.elastic.co/t/unable-to-install-elasticsearch-problem-with-public-key/154907/5 "2018-11-29T19:07:48Z")
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