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Using this tutorial, I installed ADB shell. I actually just wanted to mess around and see what can it do. My device isn't rooted but that's ok, I'm not trying to do anything dangerous. Just trying run normal user linux commands.

USB debugging is enabled.

So I typed:

help adb shell permission denied

What's that supposed to be? Is really exit the only supported command?

  • Does the command adb devices show your device? What other commands did you try? Try ls, mount, mkdir, cd, etc... and see if it works. Installing busybox from play store will increase your command repertoire. – One Face Dec 29 '14 at 6:00
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    The standard command for help in Linux is man for manual, not help. – Andrew T. Dec 29 '14 at 6:24
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First of all help is no actual command that comes with the Linux system (even though many systems like Ubuntu have one). If you would like to see valid commands, just list all files inside /system/(x)bin with the appropriate ls <directory> command.

If help is listed there then it may not be your usual help command you know from windows.

It may also be a limitation by the manufacturer so that terminal access is restricted to the system only.

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