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--- shell-scripting [2018/06/27 12:07] – dreiggy
+++ shell-scripting [2018/06/27 12:58] – dreiggy
@@ Line 1: / Line 1: @@
 ====== Shell scripting ======
 Here will be some useful examples and snippet
-===== Debug scripts =====
-<code bash>
-# sh -x some-script-name.sh
-</code>
 ===== Links =====
@@ Line 14: / Line 8: @@
   * Prevent CRON from overlapping: https://ma.ttias.be/prevent-cronjobs-from-overlapping-in-linux/
   * bash colors: https://stackoverflow.com/a/28938235/4485894
+===== Debug scripts =====
+<code bash>
+# sh -x some-script-name.sh
+</code>
+===== Differences between single and double quotes =====
+Single quotes won't interpolate anything, but double quotes will. For example: variables, backticks, certain \ escapes, etc.
+<code bash>
+$ echo "$(echo "upg")"
+upg
+$ echo '$(echo "upg")'
+$(echo "upg")
+</code>