set postgres password

charles@charles-composer:~$ su
Password:
root@charles-composer:/home/charles# su postgres
postgres@charles-composer:/home/charles$ \password postgres
No command 'password' found, did you mean:
 Command 'assword' from package 'assword' (universe)
password: command not found
postgres@charles-composer:/home/charles$ psql
psql (9.5.19)
Type "help" for help.

postgres=# \password postgres
Enter new password:
Enter it again:
postgres=# \q
postgres@charles-composer:/home/charles$

HyperV Ubunt resolution

1. From within the Ubuntu virtual machine, open Terminal
2. Type sudo vi /etc/default/grub
3. Find GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
4. Append that line with video=hyperv_fb:[specify resolution, e.g. 1024x768]
5. Here is what it might look like: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1024x768"
6. Save changes and exit
7. Run the following command: sudo update-grub
8. Restart the VM