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raspberry pi: setup and minor troubleshooting added

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This commit is contained in:
Marten B. Kante
2025-12-16 04:08:12 +01:00
parent abc3d7c7c6
commit 5ab0efdf25
2 changed files with 52 additions and 17 deletions
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18
wiki/linux/disk-management.md
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@@ -23,7 +23,6 @@ Then the swap file can be changed using the following commands.
`<location>` is the location of the swap file (for example `/swap.img`).
`<size>` describes the new size of the swap file (for example `16G`)
```sh
swapoff <location>
fallocate -l <size> <location>
@@ -176,12 +175,25 @@ The following list shows some options to quickly clean up space.
- [Package Mangers](/wiki/linux/package_manager.md)
- [ViFM Trash Bin](/wiki/linux/vifm.md#empty-trash)
## Accessing Disks as User
Sometimes - for example when flashing an SD card for a
[Raspberry Pi](/wiki/linux/raspberry_pi.md#setup) - it may be useful to do so with your default
user and not using the root user.
For this to work the user can be added to the `disk` group permanently.
Please note that this however reduces the systems security.
A command to do so, may look like the following (given the `$USER` variable is set correctly).
```sh
usermod -a -G disk $USER
```
## Error solving
This section addresses various problems that can occur and are related to
disk-management.
### sudo: unable to open ... Read-only file system
### `sudo: unable to open ... Read-only file system`
Ususally the filesystem will go into read-only mode whe the system is running
and there is a consistency error.
@@ -193,7 +205,7 @@ To fix it run:
you may want to try using the ext4-specific fsck:
- `fsck.ext4 -f /dev/sda1`
### cannot access: Transport endpoint is not connected
### `cannot access: Transport endpoint is not connected`
This error message can occur if a mounted directory is left mounted due to a
crash of the filesystem but not accessible anymore.

23
wiki/linux/raspberry_pi.md
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@@ -2,6 +2,29 @@
A [Rapberry Pi](https://www.raspberrypi.com) is a single board comuter.
## Setup
For setting up a classic Raspberry Pi an SD card is needed that contains the operating system.
For this an image has to be flashed.
The images of the operating systems can be found on the
[official website](https://www.raspberrypi.com/software/operating-systems).
A command to flash may look similar to the following example, where `<img-path>` is the path to the
image and `<disk-path>` is the path to the device to flash to (for example `/dev/sdb1`).
```sh
dd if=<img-path> of=<disk-path> status=progress
```
This however can also be done using the Raspberry Pi imager - which most
[package managers](/wiki/linux/package_manager.md) package under `rpi-mager`.
It too can also be found on the [official website](https://www.raspberrypi.com/software).
When using the imager as a non-root user this user may have to be given rights to access disks or
at least the SD card as described in the
[corresponding article](/wiki/linux/disk-management.md#accessing-disks-as-user).
The setup using the imager is guided and easier.
## Hardware Additions
There are various hardware additions which can be used with the Raspberry Pi.