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--- sysadminery:sed [2025/05/06 15:38] – created adam
+++ sysadminery:sed [2025/05/06 15:48] (current) – adam
@@ Line 5: / Line 5: @@
 :34:56 up 9 days,  3:24,  5 users,  load average: 3.08, 4.04, 14.66
-and since i'm sure you forgot: load is "processes waiting for cpu time to execute", the 3 numbers are "in the last minute", "in the last 5 minutes", and "in the last 15 minutes". (i think).
+and since I'm sure you forgot: load is "processes waiting for cpu time to execute", the 3 numbers are "in the last minute", "in the last 5 minutes", and "in the last 15 minutes". (i think). theoretically, if that number is less than the number of cores that you have, you have resources to spare for more.
-anyway, let's get one of those numbers. Here's the sed command:
+anyway, let's get one of those numbers. Here's the regular expression one would expect:
+<code regex>
+^.*load average: (([\d\.]){3,}).*$
+</code>
+Here's (uptime piped to) the sed command:
 <code bash>
@@ Line 16: / Line 22: @@
   * escape the brackets.
   * there is no ''\d''.
-  * don't escape the dot.
+  * don't escape the dot, to literally match ''.''
   * escape the braces.
-  * Now, outside of the brackets, don't escape the dot. You'll notice that not escaping the dot now does the opposite.
+  * Now, outside of the brackets, don't escape the dot to match the wildcard character. You'll notice that not escaping the dot now does the opposite.
   * capture group 1 is not ''$1'', it's ''\1''.

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