+[ -x /usr/bin/arp ] || arp() { cat /proc/net/arp; }
+[ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
+
+[ -n "$FAILSAFE" ] || {
+ for FILE in /etc/profile.d/*.sh; do
+ [ -e "$FILE" ] && . "$FILE"
+ done
+ unset FILE
+}
+
+if ( grep -qsE '^root:[!x]?:' /etc/shadow && \
+ grep -qsE '^root:[!x]?:' /etc/passwd && \
+ [ -z "$FAILSAFE" ] )
+then
+cat << EOF
+=== WARNING! =====================================
+There is no root password defined on this device!
+Use the "passwd" command to set up a new password
+in order to prevent unauthorized SSH logins.
+--------------------------------------------------
+EOF
+fi