ubuntu默认用户分析

harvey@ubuntu:/etc$ cat -b passwd

         root:x:::root:/root:/bin/bash

         daemon:x:::daemon:/usr/sbin:/bin/sh

         bin:x:::bin:/bin:/bin/sh

         sys:x:::sys:/dev:/bin/sh

         sync:x:::sync:/bin:/bin/sync

         games:x:::games:/usr/games:/bin/sh

         man:x:::man:/var/cache/man:/bin/sh

         lp:x:::lp:/var/spool/lpd:/bin/sh

         mail:x:::mail:/var/mail:/bin/sh

        news:x:::news:/var/spool/news:/bin/sh

        uucp:x:::uucp:/var/spool/uucp:/bin/sh

        proxy:x:::proxy:/bin:/bin/sh

        www-data:x:::www-data:/var/www:/bin/sh

        backup:x:::backup:/var/backups:/bin/sh

        list:x:::Mailing List Manager:/var/list:/bin/sh

        irc:x:::ircd:/var/run/ircd:/bin/sh

        gnats:x:::Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh

        nobody:x:::nobody:/nonexistent:/bin/sh

        libuuid:x::::/var/lib/libuuid:/bin/sh

        syslog:x::::/home/syslog:/bin/false

        messagebus:x::::/var/run/dbus:/bin/false

        colord:x:::colord colour management daemon,,,:/var/lib/colord:/bin/false

        lightdm:x:::Light Display Manager:/var/lib/lightdm:/bin/false

        whoopsie:x::::/nonexistent:/bin/false

        avahi-autoipd:x:::Avahi autoip daemon,,,:/var/lib/avahi-autoipd:/bin/false

        avahi:x:::Avahi mDNS daemon,,,:/var/run/avahi-daemon:/bin/false

        usbmux:x:::usbmux daemon,,,:/home/usbmux:/bin/false

        kernoops:x:::Kernel Oops Tracking Daemon,,,:/:/bin/false

        pulse:x:::PulseAudio daemon,,,:/var/run/pulse:/bin/false

        rtkit:x:::RealtimeKit,,,:/proc:/bin/false

        speech-dispatcher:x:::Speech Dispatcher,,,:/var/run/speech-dispatcher:/bin/sh

        hplip:x:::HPLIP system user,,,:/var/run/hplip:/bin/false

        saned:x::::/home/saned:/bin/false

        harvey:x:::Harvey,,,:/home/harvey:/bin/bash

harvey@ubuntu:/etc$ sudo cat -b shadow

         root:!:::::::

         daemon:*:::::::

         bin:*:::::::

         sys:*:::::::

         sync:*:::::::

         games:*:::::::

         man:*:::::::

         lp:*:::::::

         mail:*:::::::

        news:*:::::::

        uucp:*:::::::

        proxy:*:::::::

        www-data:*:::::::

        backup:*:::::::

        list:*:::::::

        irc:*:::::::

        gnats:*:::::::

        nobody:*:::::::

        libuuid:!:::::::

        syslog:*:::::::

        messagebus:*:::::::

        colord:*:::::::

        lightdm:*:::::::

        whoopsie:*:::::::

        avahi-autoipd:*:::::::

        avahi:*:::::::

        usbmux:*:::::::

        kernoops:*:::::::

        pulse:*:::::::

        rtkit:*:::::::

        speech-dispatcher:!:::::::

        hplip:*:::::::

        saned:*:::::::

        harvey:$$GHg7l$G5x.F1Rf8RBgIfDyMfwGL/:::::::

harvey@ubuntu:/etc$ cat -b group

         root:x::

         daemon:x::

         bin:x::

         sys:x::

         adm:x::harvey

         tty:x::

         disk:x::

         lp:x::

         mail:x::

        news:x::

        uucp:x::

        man:x::

        proxy:x::

        kmem:x::

        dialout:x::

        fax:x::

        voice:x::

        cdrom:x::harvey

        floppy:x::

        tape:x::

        sudo:x::harvey

        audio:x::pulse

        dip:x::harvey

        www-data:x::

        backup:x::

        operator:x::

        list:x::

        irc:x::

        src:x::

        gnats:x::

        shadow:x::

        utmp:x::

        video:x::

        sasl:x::

        plugdev:x::harvey

        staff:x::

        games:x::

        users:x::

        nogroup:x::

        libuuid:x::

        crontab:x::

        syslog:x::

        fuse:x::

        messagebus:x::

        bluetooth:x::

        scanner:x::

        colord:x::

        lpadmin:x::harvey

        ssl-cert:x::

        lightdm:x::

        nopasswdlogin:x::

        netdev:x::

        whoopsie:x::

        mlocate:x::

        ssh:x::

        avahi-autoipd:x::

        avahi:x::

        pulse:x::

        pulse-access:x::

        utempter:x::

        rtkit:x::

        saned:x::

        harvey:x::

        sambashare:x::harvey