export [-fn] [name[=word]] ...
       export -p
              The  supplied  names  are  marked for automatic export to the environment of
              subsequently executed commands.  If the -f option is given, the names  refer
              to  functions.   If  no  names are given, or if the -p option is supplied, a
              list of all names that are exported in this shell is printed.  The -n option
              causes the export property to be removed from each name.  If a variable name
              is followed by =word, the value of the variable  is  set  to  word.   export
              returns  an exit status of 0 unless an invalid option is encountered, one of
              the names is not a valid shell variable name, or -f is supplied with a  name
              that is not a function.


       umask [-p] [-S] [mode]
              The user file-creation mask is set to mode.  If mode begins with a digit, it
              is interpreted as an octal number; otherwise it is interpreted as a symbolic
              mode mask similar to that accepted by chmod(1).  If  mode  is  omitted,  the
              current  value  of the mask is printed.  The -S option causes the mask to be
              printed in symbolic form; the default output is an octal number.  If the  -p
              option is supplied, and mode is omitted, the output is in a form that may be
              reused as input.  The return status  is  0  if  the  mode  was  successfully
              changed or if no mode argument was supplied, and false otherwise.


       --noprofile
              Do not read either the system-wide startup file /etc/profile or any  of  the
              personal initialization files ~/.bash_profile, ~/.bash_login, or ~/.profile.
              By default, bash reads these files when it is invoked as a login shell...