add disk usage wikipage

wiki/pages/disk-usage.md

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+---
+author: ~ben
+published: true
+title: disk usage tools and guidelines
+description: tips and tricks for keeping track of your disk usage on tilde.team and elsewhere
+category: 
+    - main
+---
+
+# disk usage
+
+files tend to keep growing and growing until you run out of disk space all of a sudden.
+
+let's take a look at some tools to keep an eye on disk usage.
+
+### du
+
+`du` (short for `d`isk `u`sage) is the go-to tool.
+
+common switches include:
+
+* `-h`: human readable
+* `-s`: summarize
+* `-c`: total
+
+example:
+
+to see the disk usage of the current directory, run:
+    du -sh
+
+check the manpage for more information and additional switches
+
+### ncdu
+
+`ncdu` (short for `nc`urses `d`isk `u`sage) is extremely useful for visualizing
+disk usage. 
+
+call `ncdu` with no args to recurse starting in the current directory or
+pass a dir name to start there
+
+try it on your `$HOME` and see which files and dirs are taking up the most
+space.
+
+press `?` to see additional keybinds once you've started it up. you can change
+the sort order, open a shell, and delete files without closing the program.
+
+### df
+
+`df` (short for `d`isk `f`ree) lists mounted disks with usage, free space,
+and capacity. try it out from your shell to get a quick glance at total
+disk usage
+
+don't forget to use `-h` to get human readable units.
+
+
+## tilde.team guidelines
+
+even though we have plenty of disk space to go around on tilde.team,
+we request that you try to keep your usage below 1 gb.
+
+a good rule of thumb is to consider if _all_ teammates
+were to use the same amount of resources and how that would affect
+the experience for everyone else.
+
+admins occasionally take a look at disk usage in `/home` and may
+request that you delete large or unnecessary files.
+
+please check with admins if you expect to use a lot of disk
+for a short period of time so we don't bother you excessively.
+