Groups > linux.debian.user > #198407

Re: As seen above: use of su vs sudo

From	Martin <keine-eile@online.de>
Newsgroups	linux.debian.user
Subject	Re: As seen above: use of su vs sudo
Date	2018-08-07 15:50 +0200
Message-ID	<wkax3-1hh-5@gated-at.bofh.it> (permalink)
References	<wk6Wt-7qN-1@gated-at.bofh.it> <wk8bT-8mI-5@gated-at.bofh.it> <wk8lz-8q5-9@gated-at.bofh.it> <wk8EV-5t-11@gated-at.bofh.it> <wka43-16H-21@gated-at.bofh.it>
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> I've long forgotten why, but I committed "sudo su -" to muscle memory

First, you execute sudo with target UID 0 (aka. root). 
While doing that, sudo does all the fancy things for you, like setting or unsetting environments (eg SUDO_COMMAND, SUDO_UID, SUDO_USER) and check, if you will be granted to run $ANY_COMMAND or may be /bin/su with that target UID 0.
Next, with UID 0, you run /bin/su in order, to gain a login shell. Now '/bin/su -' runs the login process stripping all the things set before off. Just to run /bin/sh at the end.

You could have run 'sudo -c /bin/sh'.
In reality, 'sudo -i [-u TARGET_USER]' is your friend. Always.

Thread

As seen above: use of su vs sudo Martin Drescher <keine-eile@online.de> - 2018-08-07 12:00 +0200
  Re: As seen above: use of su vs sudo Joe <joe@jretrading.com> - 2018-08-07 12:50 +0200
    Re: As seen above: use of su vs sudo Jonathan Dowland <jmtd@debian.org> - 2018-08-07 13:20 +0200
      Re: As seen above: use of su vs sudo Martin Drescher <keine-eile@online.de> - 2018-08-07 13:30 +0200
        Re: As seen above: use of su vs sudo David Wright <deblis@lionunicorn.co.uk> - 2018-08-07 17:20 +0200
          Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 17:40 +0200
            Re: As seen above: use of su vs sudo Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-08-07 18:20 +0200
      Re: As seen above: use of su vs sudo Joe <joe@jretrading.com> - 2018-08-07 14:10 +0200
        Re: As seen above: use of su vs sudo likcoras <likcoras@riseup.net> - 2018-08-07 14:40 +0200
    Re: As seen above: use of su vs sudo likcoras <likcoras@riseup.net> - 2018-08-07 14:00 +0200
  Re: As seen above: use of su vs sudo Richard Owlett <rowlett@cloud85.net> - 2018-08-07 13:00 +0200
  Re: As seen above: use of su vs sudo Stephan Seitz <stse+debian@fsing.rootsland.net> - 2018-08-07 13:20 +0200
    Re: As seen above: use of su vs sudo James Allsopp <jamesaallsopp@googlemail.com> - 2018-08-07 13:30 +0200
      Re: As seen above: use of su vs sudo Curt <curty@free.fr> - 2018-08-07 13:50 +0200
        Re: As seen above: use of su vs sudo Stephan Seitz <stse+debian@fsing.rootsland.net> - 2018-08-07 14:30 +0200
          Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 14:30 +0200
        Re: As seen above: use of su vs sudo Jonathan Dowland <jmtd@debian.org> - 2018-08-07 15:20 +0200
          Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 15:50 +0200
      Re: As seen above: use of su vs sudo <tomas@tuxteam.de> - 2018-08-07 14:20 +0200
      Re: As seen above: use of su vs sudo Dave Sherohman <dave@sherohman.org> - 2018-08-07 15:30 +0200
    Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 13:40 +0200
      Re: As seen above: use of su vs sudo Stephan Seitz <stse+debian@fsing.rootsland.net> - 2018-08-07 14:30 +0200
  Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 13:30 +0200
    Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 13:50 +0200
      Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 14:10 +0200
        Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 14:30 +0200
          Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 15:00 +0200
            Re: As seen above: use of su vs sudo Nicolas George <george@nsup.org> - 2018-08-07 15:10 +0200
              Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 15:30 +0200
                Re: As seen above: use of su vs sudo Nicolas George <george@nsup.org> - 2018-08-07 15:40 +0200
                Re: As seen above: use of su vs sudo David Wright <deblis@lionunicorn.co.uk> - 2018-08-07 18:20 +0200
                Re: As seen above: use of su vs sudo Nicolas George <george@nsup.org> - 2018-08-07 18:40 +0200
                Re: As seen above: use of su vs sudo Greg Wooledge <wooledg@eeg.ccf.org> - 2018-08-07 18:50 +0200
                Re: As seen above: use of su vs sudo Michael Stone <mstone@debian.org> - 2018-08-07 19:10 +0200
                Re: As seen above: use of su vs sudo Curt <curty@free.fr> - 2018-08-07 20:10 +0200
                Re: As seen above: use of su vs sudo Nicolas George <george@nsup.org> - 2018-08-07 20:10 +0200
                Re: As seen above: use of su vs sudo Curt <curty@free.fr> - 2018-08-07 20:20 +0200
                Re: As seen above: use of su vs sudo Michael Stone <mstone@debian.org> - 2018-08-07 20:50 +0200
            Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 15:10 +0200
              Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 15:30 +0200
                Re: As seen above: use of su vs sudo Michael Stone <mstone@debian.org> - 2018-08-07 15:50 +0200
                Re: As seen above: use of su vs sudo Martin <keine-eile@online.de> - 2018-08-07 15:50 +0200
            Re: As seen above: use of su vs sudo Nemeth Gyorgy <friczy@freemail.hu> - 2018-08-07 21:10 +0200
              Re: As seen above: use of su vs sudo Gene Heskett <gheskett@shentel.net> - 2018-08-07 22:10 +0200
          Re: As seen above: use of su vs sudo Michael Stone <mstone@debian.org> - 2018-08-07 15:20 +0200
          Re: As seen above: use of su vs sudo Stephan Seitz <stse+debian@fsing.rootsland.net> - 2018-08-07 16:10 +0200
        Re: As seen above: use of su vs sudo Dave Sherohman <dave@sherohman.org> - 2018-08-07 15:30 +0200
          Re: As seen above: use of su vs sudo The Wanderer <wanderer@fastmail.fm> - 2018-08-07 15:40 +0200
        Re: As seen above: use of su vs sudo David Wright <deblis@lionunicorn.co.uk> - 2018-08-07 18:10 +0200
  Re: As seen above: use of su vs sudo Eike Lantzsch <zp6cge@gmx.net> - 2018-08-07 14:30 +0200
  Re: As seen above: use of su vs sudo mick crane <mick.crane@gmail.com> - 2018-08-07 16:00 +0200
  Re: As seen above: use of su vs sudo mick crane <mick.crane@gmail.com> - 2018-08-07 18:30 +0200

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