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create code fences with backticks ` or tildes ~
```
like so
``` -
add language identifier to highlight code
```python
def function(foo):
print(foo)
``` - put returns between paragraphs
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$ sudo systemctl status postgresql ● postgresql.service - PostgreSQL RDBMS Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled) Active: active (exited) since Sun 2018-05-06 06:19:47 UTC; 2h 13min ago Process: 15349 ExecStart=/bin/true (code=exited, status=0/SUCCESS) Main PID: 15349 (code=exited, status=0/SUCCESS) May 06 06:19:47 myapp systemd[1]: Starting PostgreSQL RDBMS... May 06 06:19:47 myapp systemd[1]: Started PostgreSQL RDBMS.