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PAM_ENV.CONF(5)                          Linux-PAM Manual                         PAM_ENV.CONF(5)

       pam_env.conf - the environment variables config file

       The /etc/security/pam_env.conf file specifies the environment variables to be set, unset
       or modified by pam_env(8). When someone logs in, this file is read and the environment
       variables are set according.

       Each line starts with the variable name, there are then two possible options for each
       variable DEFAULT and OVERRIDE. DEFAULT allows and administrator to set the value of the
       variable to some default value, if none is supplied then the empty string is assumed. The
       OVERRIDE option tells pam_env that it should enter in its value (overriding the default
       value) if there is one to use. OVERRIDE is not used, "" is assumed and no override will be

       VARIABLE [DEFAULT=[value]] [OVERRIDE=[value]]

       (Possibly non-existent) environment variables may be used in values using the ${string}
       syntax and (possibly non-existent) PAM_ITEMs may be used in values using the @{string}
       syntax. Both the $ and @ characters can be backslash escaped to be used as literal values
       values can be delimited with "", escaped " not supported. Note that many environment
       variables that you would like to use may not be set by the time the module is called. For
       example, HOME is used below several times, but many PAM applications don't make it
       available by the time you need it.

       The "#" character at start of line (no space at front) can be used to mark this line as a
       comment line.

       These are some example lines which might be specified in /etc/security/pam_env.conf.

       Set the REMOTEHOST variable for any hosts that are remote, default to "localhost" rather
       than not being set at all

                 REMOTEHOST     DEFAULT=localhost OVERRIDE=@{PAM_RHOST}

       Set the DISPLAY variable if it seems reasonable


       Now some simple variables

                 PAGER          DEFAULT=less
                 MANPAGER       DEFAULT=less
                 LESS           DEFAULT="M q e h15 z23 b80"
                 NNTPSERVER     DEFAULT=localhost
                 PATH           DEFAULT=${HOME}/bin:/usr/local/bin:/bin\

       Silly examples of escaped variables, just to show how they work.

                 DOLLAR         DEFAULT=\$
                 DOLLARDOLLAR   DEFAULT=        OVERRIDE=\$${DOLLAR}
                 ATSIGN         DEFAULT=""      OVERRIDE=\@

       pam_env(8), pam.d(5), pam(7)

       pam_env was written by Dave Kinchlea <kinch AT kinch.com>.

Linux-PAM Manual                            09/19/2013                            PAM_ENV.CONF(5)

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