bootc-usr-overlay - Man Page

bootc usr-overlay [-h|--help]

Adds a transient writable overlayfs on `/usr` that will be discarded on reboot.

## Use cases

A common pattern is wanting to use tracing/debugging tools, such as `strace` that may not be in the base image.  A system package manager such as `apt` or `dnf` can apply changes into this transient overlay that will be discarded on reboot.

## /etc and /var

However, this command has no effect on `/etc` and `/var` - changes written there will persist.  It is common for package installations to modify these directories.

## Unmounting

Almost always, a system process will hold a reference to the open mount point. You can however invoke `umount -l /usr` to perform a "lazy unmount".

-h,  --help

Print help (see a summary with '-h')

v1.1.0

bootc(8).