$BASH_VERSION # bash version $EDITOR # default editor $GROUPS # membership in groups $HISTFILE # user shell`s history file $HISTSIZE # how many commands can be stored in bash $HISTFILE $HOME # home directory $HOSTNAME # hostname $LANG # locale for the shell $LC_* # locale settings that override $LANG $LC_ALL # $LD_LIBRARY_PATH # paths to search for libraries $PATH # paths to search for commands, priority order $PS1 # $PS2 # $PWD # users working directory $SHLLVL # current shell level $TZ # current time zone