notes

hard_disks.md

@@ -14,5 +14,12 @@ Mounting the new VD
 * create an access folder, maybe at //mnt/backup
 * run the mount `mount /dev/sdb1 /mnt/backup`
 * edit fstab by adding
+    * using device name
+    ```
     //dev/sdb1  /mnt/backup ext4    defaults    1   2
+    ```
+    * using UUID (do `sudo blkid` to get the UUID)
+    ```
+    UUID="86e81045-a0dc-4881-8ddb-5ef25834ea5a" /datadrive  xfs     defaults,nofail 1       2
+    ```
 * somehow in the process an new systemctl service module is loaded based on fstab at runs at boot

postgres/install.sh

@@ -0,0 +1,4 @@
+sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+sudo apt-get update
+sudo apt-get -y install postgresql

postgres/move_data_directory.md

@@ -1,3 +1,14 @@
 https://www.digitalocean.com/community/tutorials/how-to-move-a-postgresql-data-directory-to-a-new-location-on-ubuntu-18-04
 
+copy the data
+`sudo rsync -av /var/lib/postgresql /target_dir`
 
+rename original as a backup
+`sudo mv /var/lib/postgresql/10/main /var/lib/postgresql/10/main.bak`
+
+point postgres to the new data directory
+`sudo vim //etc/postgresql/14/main/postgres.conf`
+`   data_directory = '/mnt/volume_nyc1_01/postgresql/10/main'`
+
+remove the old data
+`sudo rm -Rf /var/lib/postgresql/10/main.bak`