Update cheatsheets

tldr/linux/logread

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# logread
+
+> Read the `logd` ring buffer log.
+> More information: <https://openwrt.org/docs/guide-user/base-system/log.essentials>.
+
+- Print the log:
+
+`logread`
+
+- Print a specified number of messages:
+
+`logread -l {{N}}`
+
+- Filter messages by (Keyword/Regular Expression):
+
+`logread -e {{pattern}}`
+
+- Print log messages as they happen:
+
+`logread -f`