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SUDO is not universal. Just because it exists on the particular Linux distro you use, doesn’t mean it’s available on all OSes that also use the Linux kernel.

SUDO is a normal application with the suid bit. This means in order to use sudo it has to be installed on the system. Not all Linux systems have sudo installed per default like for example Debian.

Most Android systems are targeted for end users who don’t need to know the internals of Android (i.e. each Android applications runs under it’s own user), so there is no need to provide an interactive way for an end user to run a command as system administrator.

In general you can use su instead of sudo to run a command as a different user but you have to know the credentials for the target user for su (for sudo you have to know the credentials of the user running the command).

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