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b_laoshi
Asked: 2018-08-16 17:09:00 +0800 CST

Determine if a shell script is running on a LiveOS/chroot/installed system?

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How can I determine within a shell script if the script is running:

  • On a Ubuntu LiveOS (not necessarily version dependant) -- (already answered here)
  • Within a chroot on an Ubuntu LiveOS (already addressed here)
  • On a locally installed system (no LiveOS) -- (already answered here)

As all three points seem to be addressed elsewhere, I'm going to vote to close this question. Pointed out in the only answer here, a combination of tests can be used to determine chroot on LiveOS.

scripts command-line bash chroot live-environment

1 Answers

  1. Consider combining these checks to determine a live sessions:

    Look for live file system being mounted somewhere:

    losetup -l | grep /cdrom/casper/filesystem.squashfs

    If you find something there is a high chance that it's a live session.

    Check root file system:

    df /

    Or look for existence of special files (ex: ubiquity: Ubuntu installer)

    which ubiquity

    also check it's shortcut at ~/Desktop

    Check currently logged in users: users you should get: ubuntu.

    And they can all be set up to look like a live session to trick you ...

    For chroot, I'm not sure how it's possible... I'll check it out.

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