First batch of extra files

eps/hpr3013/hpr3013_bash21_ex2.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+#-------------------------------------------------------------------------------
+# Example 2 for Bash Tips show 21: the environment
+#-------------------------------------------------------------------------------
+
+BTversion='21'
+export BTversion
+
+echo "** Using 'grep' with 'env'"
+env | grep -E '(EDITOR|SHELL|BTversion)='
+echo
+
+echo "** Using 'printenv' with arguments"
+printenv EDITOR SHELL BTversion
+echo
+
+echo "** Using 'grep' with 'export'"
+export | grep -E '(EDITOR|SHELL|BTversion)='
+echo
+
+echo "** Using 'grep' with 'declare'"
+declare -x | grep -E '(EDITOR|SHELL|BTversion)='
+
+exit