Initial commit

snippets/read_first_char_of_file.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+# - Read first charactor of a file:
+# -
+# -    head -c1 <path-to-file>
+
+deb_major_version=""
+
+is_number() {
+
+   return $(test ! -z "${1##*[!0-9]*}" > /dev/null 2>&1);
+
+   # - also possible
+   # -
+   #[[ ! -z "${1##*[!0-9]*}" ]] && return 0 || return 1
+   #return $([[ ! -z "${1##*[!0-9]*}" ]])
+}
+
+if [[ -f "/etc/debian_version" ]]; then
+   
+   deb_major_version=$(head -c1 /etc/debian_version)
+   if is_number $deb_major_version ; then
+      echo -e "\n\tDebian Major Version: $deb_major_version\n"
+   else
+      echo -e "\n\tNo numeric Version given. Debian Version: $(head -1 /etc/debian_version)\n"
+   fi
+else
+   echo -e "\nFile '/etc/debian_version' not found"
+fi
+
+exit 0