add exercises 7 and 8

shell_scripting_succinctly/exercise7.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Prompts the user for a file or directory name and reports if it is
+# a regular file or directory.
+# Also performs an 'ls' long listing command against the file or directory.
+
+# Main body of shell script starts here.
+FD_NAME=$1
+
+if [ -f $FD_NAME ]
+then
+    echo "${FD_NAME} is a regular file or directory."
+    ls -l $FD_NAME
+else
+    echo "${FD_NAME} is NOT a regular file or directory."
+fi
+
+# Exit with an explicit exit status.
+exit 0