n: add nextcloud.md for future emergency self-reference

n/nextcloud.md

@@ -0,0 +1,37 @@
+---
+layout: mini
+permalink: /n/nextcloud.html
+sitemap: false
+lang: en
+---
+
+# Nextcloud survival instructions
+
+**_This does not concern you, go away, unless this actually concerns you._**
+
+## General
+
+- Install NextCloud desktop. Figure it out yourself, if it's not mentioned here.
+
+### flatpak
+
+```bash
+sudo flatpak install flathub com.nextcloud.desktopclient.nextcloud --assumeyes
+sudo flatpak override com.nextcloud.desktopclient.nextcloud --filesystem=~/Nextcloud:create
+```
+
+## Sysadmin
+
+**_Go away._** This is likely highly specific to an undisclosed location.
+
+```bash
+cd /var/www/html
+# Untested
+sudo -u www-data php --define apc.enable_cli=1 occ --help
+# Example: self-repair?
+sudo -u www-data php --define apc.enable_cli=1 occ maintenance:repair
+# Disable maintenance-mode
+sudo -u www-data php --define apc.enable_cli=1 occ maintenance:mode --off
+# Self-upgrade?
+sudo -u www-data php --define apc.enable_cli=1 occ upgrade
+```