[Samsung Galaxy Nexus] TrusterX:
Yeah just temp boot into TWRP, than perform permission repair. When finished, bring up a console for manual input (menu 24), type adb-toolkit shell

Now you're attached to the Shell.

Oh, and wait, you have to install the adb drivers. I'm sure, you did it already.

Good luck!

Gesendet von meinem Galaxy Nexus mit Tapatalk 2

edit: this is, what i did:

C:\Galaxy Nexus ToolKit>adb-toolkit.exe shell
~ # ←[6ncd /data/media/
cd /data/media/
/data/media # ←[6nls
ls
0 fix_permissions.log obb
TWRP legacy
/data/media # ←[6ncd 0
cd 0
/data/media/0 # ←[6nls -la
ls -la
drwxrwx--- 39 media_rw media_rw 4096 Nov 16 06:22 .
drwxrwx--- 6 media_rw media_rw 4096 Nov 15 13:16 ..
drwxrwxr-x 2 media_rw media_rw 4096 Nov 15 13:56 .AlarmDroid
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:02 .premier_temp_pro
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:02 .widgetsoid
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:02 AI Factory Stats
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 11:57 Alarms
drwxrwx--- 5 media_rw media_rw 4096 Nov 15 12:51 Android
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:03 CallLogBackupRestore
drwxrwx--- 5 media_rw media_rw 4096 Nov 15 13:32 DCIM
drwxrwx--- 4 media_rw media_rw 4096 Nov 15 16:32 Download
drwxrwx--- 4 media_rw media_rw 4096 Nov 15 12:08 MODS
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:09 Movies
drwxrwx--- 5 media_rw media_rw 4096 Nov 15 12:12 Music
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:13 Notifications
drwxrwx--- 9 media_rw media_rw 4096 Nov 15 12:15 Pictures
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 11:57 Podcasts
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 11:57 Ringtones
drwxrwxr-x 2 media_rw media_rw 4096 Nov 15 23:01 SMSBackupRestore
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:20 TWRP
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:59 Video
drwxrwx--- 6 media_rw media_rw 4096 Nov 15 19:03 WhatsApp
drwxrwx--- 5 media_rw media_rw 4096 Nov 15 12:20 Widgetsoid
drwxrwx--- 4 media_rw media_rw 4096 Nov 15 12:20 _Daten
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:02 adlayoutcache
drwxrwx--- 8 media_rw media_rw 4096 Nov 15 13:39 airdroid
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:02 albumthumbs
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:03 btcontroller
drwxrwxr-x 2 media_rw media_rw 4096 Nov 16 06:22 bugreports
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:03 com.mictale.gpsessentials
drwxrwx--- 4 media_rw media_rw 4096 Nov 15 12:03 data
drwxrwx--- 6 media_rw media_rw 4096 Nov 15 12:08 droidsound
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:08 lightflow
drwxrwx--- 8 media_rw media_rw 4096 Nov 15 12:13 navigator
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:13 openfeint
drwxrwx--- 6 media_rw media_rw 4096 Nov 15 14:28 osmand
drwxrwxr-x 2 media_rw media_rw 4096 Nov 15 13:33 panoramas
drwxrwx--- 2 media_rw media_rw 4096 Nov 15 12:15 temp
drwxrwx--- 3 media_rw media_rw 4096 Nov 15 12:20 viber
/data/media/0 # ←[6nchown -R media_rw:media_rw .
chown -R media_rw:media_rw .
/data/media/0 # ←[6nfind . -type d -exec chmod 770 {} \;
find . -type d -exec chmod 770 {} \;
/data/media/0 # ←[6nfind . -type f -exec chmod 660 {} \;
find . -type f -exec chmod 660 {} \;
/data/media/0 # ←[6nsync
sync
/data/media/0 # ←[6nreboot

as you can see, the path to my virtual sdcard is /data/media/0, it may differs on your device.

The ADB Server need some time after booting TWRP, so if the command "adb-toolkit shell" says "device not found" (or simmilar), just repeat it again..

Good Luck