Update cheatsheets

stdbuf

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# stdbuf
+
+> Run a command with modified buffering operations for its standard streams.
+> More information: <https://www.gnu.org/software/coreutils/stdbuf>.
+
+- Change `stdin` buffer size to 512 KiB:
+
+`stdbuf --input={{512K}} {{command}}`
+
+- Change `stdout` buffer to line-buffered:
+
+`stdbuf --output={{L}} {{command}}`
+
+- Change `stderr` buffer to unbuffered:
+
+`stdbuf --error={{0}} {{command}}`