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Subuid subgid - Gentoo Wiki SubUID GIDs are a range subordinate user group IDs that a user is allowed to use These are commonly used by containerization software, such as LXD and Podman, for creating privilege separated containers This article outlines a default configuration of subuid subgid that should work for most user workloads
Linux Howtos: manpages: subuid (5) NAME subuid - the subordinate uid file DESCRIPTION Each line in etc subuid contains a user name and a range of subordinate user ids that user is allowed to use This is specified with three fields delimited by colons (lq:rq) These fields are: * login name or UID * numerical subordinate user ID * numerical subordinate user ID count This file specifies the user IDs that ordinary users can use
Understanding rootless Podmans user namespace modes By default, rootless Podman containers map the user's user ID (UID) into the container as root of the user namespace The podman top command displays this
subgid (5) — Linux manual page - man7. org SUBGID(5) File Formats and Configuration SUBGID(5) NAME top subgid - the configuration for subordinate group ids DESCRIPTION top Subgid authorizes a group id to map ranges of group ids from its namespace into child namespaces The delegation of the subordinate gids can be configured via the subid field in etc nsswitch conf file
podman - Mapping of user ids - Stack Overflow Creating a file running as UID 2002 in the container would normally create a file with ownership UID 102001 on the host, if the etc subuid contains myuser:100000:65536 Are you maybe using --userns somehow?
How to create etc subuid and etc subgid - Stack Overflow My Manjaro installation did not configure etc subuid and etc subgid files which are required for rootless containers such as Docker to work For e g cat etc subuid returns a file not found erro
How to influence the assignment of subordinate UIDs GIDs when . . . - linux Is there a way to influence the assignment of subordinate UIDs GIDs in some way in modern enough shadow-utils to achieve a more human-readable assignment? If not, is it alright to simply overwrite the files etc subuid and etc subgid with conforming data to get what I want?
linux - Can subordinate user ID be used to grant file system . . . Bigger ranges or smarter mappings could be used, as allowed in etc subuid to affect more things or things more easily (eg: mapping 100000 to myuser instead, with newuidmap 13273 0 1001 1 1001 100000 1 would have allowed to simply run su myuser in term1, which should succeed despite a few non-fatal errors)