## Database

### postgres

- Host: postgres

```bash
$ create-postgres-user-and-database foo bar # create user `foo` and give him access to database `bar`
```

Administration shell:

```bash
$ sudo psql -h postgres -U postgres
psql> \l                    # list databases
psql> \c <database>         # connect to database
psql> \d                    # show tables
$ sudo pg_dump -h postgres -U postgres <dbname> > dump.sql # backup
$ sudo psql -h postgres -U postgres < dump.sql             # restore
```


### mysql

- Host: mysql

```bash
$ create-mysql-user-and-database foo # create database and user `foo`
```

## List zfs snapshots

```bash
$ cd /data/containers/<name>/rootfs/.zfs # .zfs directory is hidden and will not be shown by `ls -a`
$ ls
```

## Ldap

Administration: https://ldap.higgsboson.tk

| objectclass | description                  |
| ----------- | ---------------------------- |
| mailaccount | access imap/smtp             |
| owncloud    | https://cloud.higgsboson.tk  |
| gitlab      | https://git.higgsboson.tk    |
| ttrss       | https://rss.higgsboson.tk    |
| jabber      | xmpp                         |

## Mail

| Key         | Value                        |
| ----------- |----------------------------- |
| Imap        | imap.higgsboson.tk, Port 143 |
| Smtp        | smtp.higgsboson.tk, Port 567 |
| Webmail     | https://mail.higgsboson.tk   |
| Encryption  | STARTTLS or TLS              |
| MX-Record   | mail.higgsboson.tk           |
| SRV-Record  | v=spf1 a:mail.higgsboson.tk ip6:2a01:4f8:210:31fd:1::10 -all |

## LXC

```bash
$ lxc-attach -n <name>        # login
$ systemctl start lxc@<name>  # start container
$ systemctl stop lxc@<name>   # stop container
```

## Get logs

`lxc-log <CONTAINER> <SERVICE>`

example:
```bash
$ lxc-log mail postfix # get logs of postfix service in the mail container
$ lxc-log mail postfix -f # Additional parameter are passed to journalctl
```