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--- shelltricks [2021-05-13 18:50] – Added maildir date checking thingy fanir
+++ shelltricks [2021-08-02 14:19] (aktuell) – fanir
@@ Zeile 36: / Zeile 36: @@
 The only differences are the folders (''cur'' vs. ''new'') and the sorting done by ''ls''.
+===== Extract IP addresses from "ip a" output by regex =====
+Might be useful for scripting, I guess.
+<code bash>
+IPRE='192\.168\.1\.|2001:1234:'
+ip a s up | grep -Eo "inet6? [^ /]+" | cut -d' ' -f2 | grep -E "$IPRE"
+</code>
+This prints:
+<code>
+.168.1.123
+:1234:5678:90ab:cdef:1234:5678:90ab
+</code>