genid: add page (#5867)

pages/linux/genid.md

@@ -0,0 +1,24 @@
+# genid
+
+> Generate IDs, such as snowflakes, UUIDs, and a new GAID.
+> More information: <https://github.com/bleonard252/genid>.
+
+- Generate a UUIDv4:
+
+`genid uuid`
+
+- Generate a UUIDv5 using a namespace UUID and a specific name:
+
+`genid uuidv5 {{{ce598faa-8dd0-49ee-8525-9e24fff71dca}}} {{name}}`
+
+- Generate a Discord Snowflake, without a trailing newline (useful in shell scripts):
+
+`genid --script snowflake`
+
+- Generate a Generic Anonymous ID with a specific "real ID":
+
+`genid gaid {{real_id}}`
+
+- Generate a Snowflake with the epoch set to a specific date:
+
+`genid snowflake --epoch={{unix_epoch_time}}`