Carlos Stange Yáñez

## Description of the Pull Request (PR): Write your description of the PR here. Be sure to include as much background, and details necessary for the reviewers to understand exactly...

## Description of the Pull Request (PR): `singularity.conf` now accepts setting the `allow uts ns` option, and can invalidate the use of the `--uts` and `--hostname` flags. ### This fixes...

### Example: file-generating/URL-to-PDF\ api - Locally building the image works on both `arm64` and `x86_64`, but it gets a lot of 404 errors when trying to access the Debian repositories....

### Example: database/redis The build process fails. Many 404 errors appear when trying to access Debian repositories. ``` $ sudo singularity build redis.sif redis.def INFO: Starting build... INFO: Using cached...

### Example: database/mongodb The build process fails. Many 404 errors appear when trying to access Debian repositories. ``` $ sudo singularity build mongodb.sif mongodb.def INFO: Starting build... INFO: Downloading library...

### Example: database/mariadb When following the instructions in README.md, you reach a point where the example stops working. Specifically in the "Secure our installation" section: ``` > mysql_secure_installation ... Enter...

### Example: file-generating/ronn Example builds and runs without problem in `x86_64`, it would be nice if this worked on `arm64` too.

Added a line about `instance run`.

1

- Fixes #244

Ref: https://github.com/sylabs/singularity/issues/3083