Update cheatsheets

linux/dmesg

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dmesg
+
+> Write the kernel messages to `stdout`.
+> More information: <https://manned.org/dmesg>.
+
+- Show kernel messages:
+
+`dmesg`
+
+- Show kernel error messages:
+
+`dmesg --level err`
+
+- Show kernel messages and keep reading new ones, similar to `tail -f` (available in kernels 3.5.0 and newer):
+
+`dmesg -w`
+
+- Show how much physical memory is available on this system:
+
+`dmesg | grep -i memory`
+
+- Show kernel messages 1 page at a time:
+
+`dmesg | less`
+
+- Show kernel messages with a timestamp (available in kernels 3.5.0 and newer):
+
+`dmesg -T`
+
+- Show kernel messages in human-readable form (available in kernels 3.5.0 and newer):
+
+`dmesg -H`
+
+- Colorize output (available in kernels 3.5.0 and newer):
+
+`dmesg -L`