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This makes ping(8) work without CAP_NET_ADMIN and CAP_NET_RAW because those aren't effective inside rootless Podman containers. It's quite useful when using OSTree based operating systems like Fedora Silverblue, where development environments are often set up using rootless Podman containers with helpers like Toolbox [1]. Not having a basic network utility like ping(8) work inside the development environment can be inconvenient. See: https://lwn.net/Articles/422330/ http://man7.org/linux/man-pages/man7/icmp.7.html https://github.com/containers/libpod/issues/1550 The upper limit of the range of group identifiers is set to 2147483647, which is 2^31-1. Values greater than that get rejected by the kernel because of this definition in linux/include/net/ping.h: #define GID_T_MAX (((gid_t)~0U) >> 1) That's not so bad because values between 2^31 and 2^32-1 are reserved on systemd-based systems anyway [2]. [1] https://github.com/debarshiray/toolbox [2] https://systemd.io/UIDS-GIDS.html#summary
systemd - System and Service Manager
Details
General information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.
Stable branches with backported patches are available in the stable repo.