New post: ncdu disk usage

content/ncdu_disk_usage.md

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+---
+title: "Cleaning up a server? Find big files and folders with ncdu"
+author: Marius Mather
+date: 2024-04-19
+Category: Misc
+Tags: shell,terminal
+---
+
+You might have used disk space analyzers like [WizTree](https://diskanalyzer.com/)
+to find what's using up your hard drive space on your computer. 
+If you're running out of room on a server, though, it can be a bit tougher to work
+out what's chewing up space.
+
+The first step is usually the `df` command to see how much space is used on
+different volumes (the `-h` flag makes this more readable):
+
+```
+$ df -h
+Filesystem    Size  Used Avail Use% Mounted on
+devtmpfs       863M     0  863M   0% /dev
+tmpfs          893M  168K  893M   1% /dev/shm
+tmpfs          893M  9.5M  883M   2% /run
+tmpfs          893M     0  893M   0% /sys/fs/cgroup
+/dev/map       17G  6.9G   11G  41% /
+```
+
+For a better idea of the biggest directories and files though, you can use
+[ncdu](https://dev.yorhel.nl/ncdu), which scans your entire filesystem
+for you and finds the largest ones.
+
+Run `sudo ncdu /` and you'll get an interactive interface like:
+
+![Example ncdu results](images/ncdu_disk_usage/ncdu_screenshot.png)
+
+You can navigate into directories to see exactly which subfolders are taking up room.
+
+You can install it in Ubuntu via `sudo apt install ncdu`, or on MacOS via `brew install ncdu`.