#+title: home computer info
#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="_share/media/css/computer.css" />
#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="_share/media/css/org-media-sass/content-overview.css" />
#+OPTIONS: H:6



* router
** wifi
| category  | value        |
|-----------+--------------|
| ssid      | ronny-wifi   |
| password  | 2reishit2ara |
| router-ip | 192.169.0.1  |

** internet
| category            |           value |
|---------------------+-----------------|
| internet ip address |  94.159.253.187 |
| subnet mask         | 255.255.255.255 |
| default gateway     |   82.102.129.99 |
| primary dns         |   80.179.52.100 |
| secondary dns       |   80.179.55.100 |

** dhcp
| category        | value                       |
|-----------------+-----------------------------|
| dhcp server     | enabled                     |
| ip address pool | 192.168.0.2 - 192.168.0.253 |


* raspberry-pi
| category | value        |
|----------+--------------|
| username | ronny        |
| password | 2reishit2ara |
| hostname | ronberrypi   |

** to be able to ping the raspberry-pi
#+begin_src bash
ping ronberrypi.local
#+end_src


* storage
** External Hard Drive Info
This table keeps track of the Raspberry Pi's external storage setup.

| Device    | Filesystem | Label   | Mount Point  | Mount Options                |
|-----------+------------+---------+--------------+------------------------------|
| /dev/sda2 | ext4       | storage | /mnt/storage | defaults,relatime,commit=600 |

| Device    | UUID                                 |
|-----------+--------------------------------------|
| /dev/sda2 | 5bb54030-2df7-4798-afb5-bd2878ae0def |


** Hard Drive commands

| purpose                          | command                            |
|----------------------------------+------------------------------------|
| find the UUID                    | lsblk -f                           |
| verify mount point               | df -h  : grep storage              |
| check filesystem typ             | sudo blkid / dev/sda2              |
| remount drive without rebooting  | sudo mount -o remount /mnt/storage |
| check if new optinos are applied | mount : grep storage               |
| verify changes                   | cat /etc/fstab : grep storage      |

** mount options available

| Option            | Description                                                                  |
|-------------------+------------------------------------------------------------------------------|
| defaults          | Uses the default options: `rw, suid, dev, exec, auto, nouser, async`.        |
| rw                | Mounts the filesystem as **read/write** (default).                           |
| ro                | Mounts the filesystem as **read-only**.                                      |
| noexec            | Prevents execution of binaries on the mounted filesystem.                    |
| exec              | Allows execution of binaries (default).                                      |
| nosuid            | Blocks `setuid`/`setgid` binaries from running.                              |
| nodev             | Ignores device files (e.g., `/dev/null`) on this filesystem.                 |
| noatime           | **Disables access time updates** to improve performance.                     |
| nodiratime        | Disables directory access time updates (for performance).                    |
| relatime          | **Updates access time only if the file is modified**, balancing performance. |
| strictatime       | **Always updates access time** (not recommended for performance reasons).    |
| sync              | Writes changes to disk **immediately** instead of caching them.              |
| async             | Writes changes to disk **asynchronously** (default, better performance).     |
| commit=600        | Delays disk writes for **600 seconds (10 minutes)**, reducing wear.          |
| nofail            | Allows booting even if the mount fails (useful for external drives).         |
| errors=remount-ro | If an error occurs, remounts the filesystem as **read-only**.                |

** performance options
 | performance status                    | mount options                             |
 |---------------------------------------+-------------------------------------------|
 | maximum                               | defaults, noatime, nodiratime, commit=600 |
 | accurate file access times            | defaults, relatime, commit=600            |
 | extra safety in case of drive failure | errors=remount-ro, nofail                 |

* installed apps via brew
- kubuntu
  - to read ext4