{"id":51,"date":"2013-03-08T14:30:00","date_gmt":"2013-03-08T09:00:00","guid":{"rendered":"https:\/\/tuxtrix.com\/2013\/03\/how-to-fix-android-devices-no.html"},"modified":"2015-08-23T09:35:21","modified_gmt":"2015-08-23T04:05:21","slug":"how-to-fix-android-devices-no","status":"publish","type":"post","link":"https:\/\/tuxtrix.com\/how-to-fix-android-devices-no\/","title":{"rendered":"[How To] Fix Android devices not recognised by adb"},"content":{"rendered":"
\n
<\/div>\n
\"\"<\/a>sd@sd-1:~$adb get-serialno<\/code>\r\nunknown<\/code>\r\nsd@sd-1:~$ adb shell<\/code>\r\nerror: device offline<\/code><\/pre>\n
If you are one of those frustrated users who cannot get adb to work with your android device, you may be in for a breather.<\/p>\n
The issue is probably similar for all operating systems. In Linux and to some extent Mac, this issue may be caused by change in ownership of the folder\u00a0 .android<\/i><\/b>. This is a hidden folder. You will be able to see it in Nautilus file manager by pressing Ctrl+H or in the command line using the command ll or ls -al.<\/div>\n
<\/div>\n
Diving a little deeper you can confirm whether the .android folder by the current user or some other user. This was the case with my system. Using the command below, you can confirm .<\/div>\n
<\/div>\n
sd@sd-1:~$ll | grep .android<\/code><\/div>\n
drwxr-x---\u00a0 2 root\u00a0\u00a0\u00a0\u00a0 root\u00a0\u00a0\u00a0\u00a0 4096 Mar\u00a0 9 00:48 .android\/<\/code><\/div>\n
<\/div>\n
As you can see from the above list, the folder .android<\/i><\/b> is owned by root<\/b> and not by the user sd<\/b> and hence will not be accessed by adb unless you give sudo.<\/div>\n
<\/div>\n
So, to solve the problem, we need to update the ownership the current user. Also, I backed up the old adbkey and adbkey.pub and renamed it as adbkey.bak and adbkey.pub.bak. You may wish to do the same.<\/div>\n
<\/div>\n
sd@sd-1:~$ sudo chown -R sd:sd .android\/<\/code><\/div>\n
sd@sd-1:\/home\/sd\/.android# mv adbkey adbkey.bak<\/code>
\nsd@sd-1:\/home\/sd\/.android# mv adbkey.pub adbkey.pub.bak<\/code>
\nsd@sd-1:~$ ll .android\/<\/code>
\ntotal 24<\/code>
\ndrwxr-x---\u00a0\u00a0 2 sd sd\u00a0 4096 Mar\u00a0 9 00:48 .\/<\/code>
\ndrwx------ 108 sd sd 12288 Mar\u00a0 7 19:31 ..\/<\/code>
\n-rw-------\u00a0\u00a0 1 sd sd\u00a0 1704 Dec 27 13:04 adbkey.bak<\/code>
\n-rw-r--r--\u00a0\u00a0 1 sd sd\u00a0\u00a0 730 Dec 27 13:04 adbkey.pub.bak<\/code><\/div>\n
<\/div>\n
\u00a0Now unplug the usb cable from the android device and restart the adb server<\/div>\n
<\/div>\n
sd@sd-1:~$ adb kill-server;adb start-server<\/code>
\n* daemon not running. starting it now on port 5037 *<\/code>
\n* daemon started successfully *<\/code><\/div>\n
Plug the cable back to the android device and check the adb status. You will see your device is recognized.<\/div>\n
sd@sd-1:~$ adb get-state<\/code>
\ndevice<\/code><\/div>\n
<\/div>\n
Windows users can delete the .android folder altogether and try restarting the sever ( I have not tried it. Do not hold me responsible if anything goes wrong.)<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
sd@sd-1:~$adb get-serialno unknown sd@sd-1:~$ adb shell error: device offline If you are one of those frustrated users who cannot get adb to work with your android device, you may be in for a breather. The issue is probably similar for all operating systems. In Linux and to some extent Mac, this issue may be caused […]<\/p>\n","protected":false},"author":2,"featured_media":444,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[515,1],"tags":[97,30,4,6],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg","uagb_featured_image_src":{"full":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"thumbnail":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index-150x150.jpeg",150,150,true],"medium":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"medium_large":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"large":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"1536x1536":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"2048x2048":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false],"popular_posts_img":["https:\/\/tuxtrix.com\/wp-content\/uploads\/2013\/03\/index.jpeg",162,200,false]},"uagb_author_info":{"display_name":"Sayantan Das","author_link":"https:\/\/tuxtrix.com\/author\/sayantan\/"},"uagb_comment_info":0,"uagb_excerpt":"sd@sd-1:~$adb get-serialno unknown sd@sd-1:~$ adb shell error: device offline If you are one of those frustrated users who cannot get adb to work with your android device, you may be in for a breather. The issue is probably similar for all operating systems. In Linux and to some extent Mac, this issue may be caused…","_links":{"self":[{"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/posts\/51"}],"collection":[{"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/comments?post=51"}],"version-history":[{"count":4,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/posts\/51\/revisions"}],"predecessor-version":[{"id":1126,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/posts\/51\/revisions\/1126"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/media\/444"}],"wp:attachment":[{"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/media?parent=51"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/categories?post=51"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tuxtrix.com\/wp-json\/wp\/v2\/tags?post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}