Provided by: login_4.1.1-1ubuntu1_i386 bug

NAMN

       su - change user ID or become superuser

SYNOPSIS

       su [flaggor] [INLOGGNINGSNAMN]

BESKRIVNING

       The su command is used to become another user during a login session.
       Invoked without a username, su defaults to becoming the superuser. The
       optional argument - may be used to provide an environment similar to
       what the user would expect had the user logged in directly.

       Additional arguments may be provided after the username, in which case
       they are supplied to the user´s login shell. In particular, an argument
       of -c will cause the next argument to be treated as a command by most
       command interpreters. The command will be executed by the shell
       specified in /etc/passwd for the target user.

       Du kan använda argumentet -- för att separera flaggorna till su från de
       argument som skickas till skalet.

       Användaren kommer att frågas efter ett lösenord, om det är lämpligt.
       Ogiltiga lösenord kommer att ge ett felmeddelande. Alla försök, både
       giltiga och ogiltiga, loggas för att detektera misskötsel av systemet.

       The current environment is passed to the new shell. The value of $PATH
       is reset to /bin:/usr/bin for normal users, or
       /sbin:/bin:/usr/sbin:/usr/bin for the superuser. This may be changed
       with the ENV_PATH and ENV_SUPATH definitions in /etc/login.defs.

       A subsystem login is indicated by the presence of a "*" as the first
       character of the login shell. The given home directory will be used as
       the root of a new file system which the user is actually logged into.

FLAGGOR

       Flaggorna som gäller för kommandot su är:

       -c, --command COMMAND
           Ange ett kommando som ska startas av skalet med -c.

       -, -l, --login
           Tillhandahåll en miljö som liknar den som användaren skulle
           förvänta sig om användaren loggat in direkt.

           När - används måste den anges som den sista flaggan för su. De
           andra formerna (-l och --login) har inte denna restriktion.

       -s, --shellSKAL
           Skalet som ska startas.

           The invoked shell is chosen from (highest priority first):

           ·   Skalet angivet med --shell.

           ·   Om --preserve-environment används, anges skalet med
               miljövariabeln $SHELL.

           ·   The shell indicated in the /etc/passwd entry for the target
               user.

           ·   /bin/sh om ett skal inte kunde hittas med någon ovanstående
               metod.

               If the target user has a restricted shell (i.e. the shell field
               of this user´s entry in /etc/passwd is not listed in
               /etc/shell), then the --shell option or the $SHELL environment
               variable won´t be taken into account, unless su is called by
               root.

       -m, -p, --preserve-environment
           Behåll den aktuella miljön.

           Om målanvändaren har ett begränsat skal har denna flagga ingen
           effekt (såvida inte su har startats av root).

TÄNK

       Denna version av su har många kompileringsflaggor, kanske bara några
       används på specifika system.

CONFIGURATION

       The following configuration variables in /etc/login.defs change the
       behavior of this tool:

       CONSOLE_GROUPS (string)
           List of groups to add to the user´s supplementary group set when
           logging in on the console (as determined by the CONSOLE setting).
           Default is none.

           Use with caution - it is possible for users to gain permanent
           access to these groups, even when not logged in on the console.

       DEFAULT_HOME (boolean)
           Indicate if login is allowed if we can´t cd to the home directory.
           Default in no.

           If set to yes, the user will login in the root (/) directory if it
           is not possible to cd to her home directory.

       ENV_PATH (string)
           If set, it will be used to define the PATH environment variable
           when a regular user login. The value can be preceded by PATH=, or a
           colon separated list of paths (for example /bin:/usr/bin). The
           default value is PATH=/bin:/usr/bin.

       ENV_SUPATH (string)
           If set, it will be used to define the PATH environment variable
           when the superuser login. The value can be preceded by PATH=, or a
           colon separated list of paths (for example
           /sbin:/bin:/usr/sbin:/usr/bin). The default value is
           PATH=/bin:/usr/bin.

       SULOG_FILE (string)
           If defined, all su activity is logged to this file.

       SU_NAME (string)
           If defined, the command name to display when running "su -". For
           example, if this is defined as "su" then a "ps" will display the
           command is "-su". If not defined, then "ps" would display the name
           of the shell actually being run, e.g. something like "-sh".

       SYSLOG_SU_ENAB (boolean)
           Enable "syslog" logging of su activity - in addition to sulog file
           logging.

FILER

       /etc/passwd
           Användarkontoinformation.

       /etc/shadow
           Säker användarkontoinformation.

SE OCKSÅ

       login(1), login.defs(5), sg(1), sh(1)