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--- linux [2022/07/16 21:11] – roger
+++ linux [2024/11/17 12:59] (current) – external edit 127.0.0.1
@@ Line 141: / Line 141: @@
 This command in particular is very usefull to check if all the JSON files in a repository are well formated in a CI/CD step.
+===== ncdu =====
+Ncdu is a disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where you don’t have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed.
+Usage:
+<code bash>
+ncdu -x /
+</code>
+Where ''/'' is the filesystem you want to check
+===== awk =====
+==== Print the first column of a string ====
+<code bash>
+echo "This is a string" | awk '{print ($1)}'
+# Output: "This"
+</code>
+==== Print a full string in lowercase or uppercase ====
+<code bash>
+echo "This Is A CaPiTaLiZeD String" | awk '{print tolower($0)}'
+# Output: "this is a capitalized string"
+echo "This Is A CaPiTaLiZeD String" | awk '{print toupper($0)}'
+# Output: "THIS IS A CAPITALIZED STRING"
+</code>