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Core dumps are not specific to ROS (1 or 2), managed by it or created by any of the client libraries, but a feature of your OS. See #q260977 for a previous Q&A about them.
They're actually a very useful thing to have after a crash, as they allow a developer to debug a process post-mortem (ie: after it has already crashed and been terminated by the OS).
As to disabling their generation, you could take a look at the Arch documentation on Core dumps.
The Docker image you mention (ros:galactic-ros-core) is based on Ubuntu Focal. Canonical doesn't appear to have any documentation specifically about the configuration of core dumps (that I can find). The ulimit section in the Arch documentation should work however, as it's for Bash in general. This SO post also has some information.
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Core dumps are not specific to ROS (1 or 2), managed by it or created by any of the client libraries, but a feature of your OS. See #q260977 for a previous Q&A about them.
They're actually a very useful thing to have after a crash, as they allow a developer to debug a process post-mortem (ie: after it has already crashed and been terminated by the OS).
As to disabling their generation, you could take a look at the Arch documentation on Core dumps.
The Docker image you mention (ros:galactic-ros-core) is based on Ubuntu Focal. Canonical doesn't appear to have any documentation specifically about the configuration of core dumps (that I can find). The ulimit section in the Arch documentation should work however, as it's for Bash in general. This SO post also has some information.
Edit: I'm hesitant to duplicate information that's so easily found already, but to make this answer more self-contained:
To disable core dumps in the current Bash session: ulimit -c 0.
Or edit /etc/security/limits.conf and set soft core for * (ie: all users) to 0 (see again the Arch documentation linked earlier).
And just to reiterate: this is OS-level configuration. Not ROS.
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