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+# EMAIL FROM SERVER
+
+apparmor _WILL_ conflict: https://linuxconfig.org/how-to-disable-apparmor-on-ubuntu-20-04-focal-fossa-linux and must exempt msmtp with these two commands:
+ln -s /etc/apparmor.d/usr.bin.msmtp /etc/apparmor.d/disable/
+apparmor_parser -R /etc/apparmor.d/disable/usr.bin.msmtp
+
+## Installation: apt-get install msmtp msmtp-mta -y
+
+## Config file for MSMTP with GMAIL
+
+```
+###################################################
+## Config file in /etc/msmtprc
+##
+## Set defaults for all accounts
+defaults
+auth on
+tls on
+tls_trust_file /etc/ssl/certs/ca-certificates.crt
+account gmail
+host smtp.gmail.com
+port 587
+from "DEVOPS" gzadmalrt@gmail.com
+user gzadmalrt@gmail.com
+password brlkecifcxddsebm
+account default : gmail
+aliases /etc/msmtp_aliases
+####################################################
+```
+
+(note, need to set up 2fa in gmail first then create an app password which is what is used for the password here)
+
+## Aliases file contents (/etc/msmtp_aliases):
+
+```
+root: gzmailadmin@gmail.com
+postmaster: gzmailadmin@gmail.com
+default: gzmailadmin@gmail.com
+```
+
+## Testing
+
+`(echo "Subject: Test"; echo 'Body of the email') | msmtp cardjohn@ayanova.com`
+
+## Email on boot or shutdown of server
+
+Make this script in /etc/init.d/bootemail
+
+```bash
+#! /bin/sh
+
+### BEGIN INIT INFO
+
+# Provides: bootemail
+
+# Required-Start:
+
+# Required-Stop:
+
+# Default-Start: 1 2 3 4 5
+
+# Default-Stop: 0 6
+
+# Short-Description: on boot and shutdown send a email.
+
+# Description:
+
+### END INIT INFO
+
+
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+
+. /lib/lsb/init-functions
+
+case "$1" in
+start|status)
+(echo "Subject: Server start"; echo 'The server has started') | msmtp gzmailadmin@gmail.com
+date +"%Y-%m-%d %H:%M:%S --start" >> /var/log/bootemail.log
+;;
+restart|reload|force-reload)
+echo "Error: argument '$1' not supported" >&2
+exit 3
+;;
+stop)
+(echo "Subject: Server stopped"; echo 'The server is powering off') | msmtp gzmailadmin@gmail.com
+date +"%Y-%m-%d %H:%M:%S --stop" >> /var/log/bootemail.log
+;;
+\*)
+echo "Usage: $0 start|stop" >&2
+exit 3
+;;
+esac
+
+return 0
+
+```
+
+Make it executable, from /etc/init.d folder execute: `chmod +x bootemail`
+Enable: `update-rc.d bootemail defaults`
+
+# System restart required info
+
+https://linuxhandbook.com/system-restart-required-ubuntu/
+
+# SSH
+
+## Add existing user manually
+
+(joeblogs is the user folder here, to create user need to use adduser add to sudo group etc, lots of guides online for that)
+
+## Create the .ssh directory, and set its permissions
+
+mkdir ~joebloggs/.ssh
+chown joebloggs ~joebloggs/.ssh
+chmod 0700 ~joebloggs/.ssh
+
+## Create the authorized keys file, and set its permissions
+
+nano ~joebloggs/.ssh/authorized_keys <--- Here, paste in the key from digitalocean keys in account settings security
+chown joebloggs ~joebloggs/.ssh/authorized_keys
+chmod 0700 ~joebloggs/.ssh/authorized_keys
+
+# LETSENCRYPT
+
+## Expanding / changing certificate
+
+Changing a Certificate’s Domains
+
+The --cert-name flag can also be used to modify the domains a certificate contains, by specifying new domains using the -d or --domains flag.
+If certificate example.com previously contained example.com and www.example.com, it can be modified to only contain example.com
+by specifying only example.com with the -d or --domains flag. Example:
+
+certbot certonly --cert-name example.com -d example.com
+
+The same format can be used to expand the set of domains a certificate contains, or to replace that set entirely:
+
+certbot certonly --cert-name example.com -d example.org,www.example.org
+
+SO FOR EXAMPLE for HelloAyaNova.com
+
+certbot --nginx --cert-name helloayanova.com -d test.helloayanova.com,helloayanova.com,www.helloayanova.com,1665.helloayanova.com,7331.helloayanova.com,8888.helloayanova.com,a261.helloayanova.com
+
+# NGINX
+
+## Log
+
+View dynamic errors and access logs using tail command:
+tail -f /var/log/nginx/error.log
+//view access log
+tail -f /var/log/nginx/access.log
+
+USEFUL COMMANDS
+
+Get NGINX version from containerized nginx:
+docker container exec -it \[container-id\] nginx -v
+
+SUDO -> ROOT for session
+sudo -i
+(use exit to go back to john account)
+
+Connect shell to running container:
+docker exec -it \[container-id\] bash (or ash on alpine)
+
+CERTBOT DRY RUN
+append --dry-run to command
+
+BACKUP FOLDERS AND FILES
+cp -R pecklist pecklist_backup
+
+REMOVE OLD .NET RUNTIMES:
+Some of these commands get the job done
+cd /usr/share/dotnet/shared
+apt-cache pkgnames Microsoft\*
+apt-cache pkgnames
+apt list --installed
+apt-get remove dotnet-runtime-3.0
+
+# APT package manager
+
+## Kept back package
+
+If a package has been "kept back":
+https://superuser.com/questions/1107334/apt-says-packages-have-been-kept-back-what-to-do/1108268
+
+## Uninstall and purge package
+
+sudo apt-get --purge remove package_name
+apt-get autoremove
+
+# SPACES BACKUP
+
+Setup spaces utilities:
+s3cmd: https://www.digitalocean.com/docs/spaces/resources/s3cmd/
+
+manually copy a file to spaces:
+
+```bash
+/usr/bin/s3cmd put filename.zip s3://gztw1
+```
+
+# POSTGRES
+
+## control service
+
+sudo systemctl stop postgresql
+sudo systemctl start postgresql
+sudo systemctl restart postgresql
+sudo systemctl status postgresql
+
+## PSQL RUN SQL COMMANDS
+
+Commands must be terminated with a semicolon or it will wait until it sees one
+
+Open sql console as postgres admin user:
+sudo -u postgres psql
+
+### Quit psql
+
+`\q`
+
+### List all dbs
+
+`\l`
+
+### Get disk size of db
+
+In bytes:
+`select pg_database_size('AyaNova');`
+
+Prettified to human readable sizes:
+
+```sql
+SELECT
+    pg_size_pretty (
+        pg_database_size ('AyaNova')
+    );
+```
+
+Display the size of _all_ databases in human readable format
+
+```sql
+SELECT
+    pg_database.datname,
+    pg_size_pretty(pg_database_size(pg_database.datname)) AS size
+    FROM pg_database;
+```
+
+# LOG FILES
+
+show log file usage of system logs
+
+```bash
+root@devops:/var/ayanova/data/logs# du -h /var/log/
+```
+
+## Cleaning out log files
+
+https://support.hostway.com/hc/en-us/articles/360001972270-How-to-clean-log-files-in-Linux
+https://linuxhandbook.com/clear-systemd-journal-logs/
+
+## Linux system journal logs cap
+
+If down the road need to cap system journal logs size:
+Add this to the standard server config script
+cap system journal logs in linux to 250mb or some reasonable value
+https://linuxhandbook.com/clear-systemd-journal-logs/
+
+## Viewing huge log files
+
+Use Less command, it has special commands to jump to start and end of file g G = go
+q to quit
+page up down and more if look online
+
+# FIND BIG FILES
+
+Find the biggest folders from any directory:
+
+```bash
+root@devops:/# du -h --max-depth=1 | sort -rh
+```
+
+Then go into each folder and run again to limit to that folder and subfolders
+
+# DISK USAGE
+
+```bash
+df -h
+```
diff --git a/docs/mkdocs.yml b/docs/mkdocs.yml
index c7e323c..014819a 100644
--- a/docs/mkdocs.yml
+++ b/docs/mkdocs.yml
@@ -40,5 +40,8 @@ nav:
   - 'Deploy AyaNova': 'deploy-ayanova.md'
   - 'Deploy QBI': 'deploy-qbi.md'
   - 'Deploy Rockfish': 'deploy-rockfish.md'
+- Troubleshooting:
+  - 'How to misc': 'howto.md'
+