write managing groups

system/managing_groups.md

@@ -0,0 +1,32 @@
+---
+title: "Managing Groups"
+tags: [ "system" ]
+---
+
+Check which groups you are in, and which are available:
+
+```sh
+cat /etc/group
+groups
+cat /etc/group | grep $USER
+```
+
+Remove yourself from all groups, and add yourself back to only `wheel`, `audio`, and your own group:
+
+```sh
+sudo usermod --groups wheel,audio,$USER
+```
+
+Add yourself to the `wheel` group:
+
+```sh
+su root -c "usermod --append --groups wheel $USER"
+```
+Add yourself to the `network` group:
+
+```sh
+sudo usermod -aG network $USER
+```
+
+The changes will not take effect until you log in again, so reboot or log into `localhost` with [ssh](../networking/ssh.md).
+