LSNS(8) System Administration LSNS(8) (NAME) lsns - (Namespaces) (SYNOPSIS) lsns [options] [namespace ID] (DESCRIPTION) lsns (namespaces) (namespace) . namespace inode . . . (--tree --list) --output . NSFS net --type . <<,>> --nowrap . lsns /proc (non-root) . /proc (unshared) PID ( unshare --mount-proc ). lsns (persistent namespaces) bind mount /proc/pid/ns/type . (OPTIONS) -H, --list-columns --output . --json --raw . -J, --json JSON. -l, --list . -n, --noheadings . -o, --output list . --help . list +list ( lsns -o +PATH) . --output-all . -P, --persistent ( persistent) (bind mount) /proc/pid/ns/type . -p, --task PID PID. -Q, --filter expr (expr) . (EXPERIMENTAL) . scols-filter(5) . root : lsns --filter 'USER != "root" and NPROCS > 1' -r, --raw . -t, --type type (type) . mnt net ipc user pid uts cgroup time. . -u, --notruncate . -W, --nowrap . -T, --tree[=rel] . process rel () . --tree . parent () / . owner () / . rel owner . -h, --help . -V, --version . (EXIT STATUS) lsns : 0 . 1 . 2 ioctl . (ENVIRONMENT) LSNS_DEBUG=all lsns . LIBSMARTCOLS_DEBUG=all libsmartcols . LIBSMARTCOLS_DEBUG_PADDING=on . LIBSMARTCOLS_JSON=compact|lines JSON --json. compact JSON lines JSON ( JSON ). JSON (pretty-printed) . (AUTHORS) Karel Zak (SEE ALSO) nsenter(1), unshare(1), clone(2), namespaces(7), ioctl_ns(2), ip-netns(8), scols-filter(5) (REPORTING BUGS) . . (AVAILABILITY) lsns util-linux . . util-linux 2.42.3 2026-09-02 LSNS(8)