**bpftool** [*OPTIONS*] **link** *COMMAND*

*OPTIONS* := { |COMMON_OPTIONS| | { **-f** | **--bpffs** } | { **-n** | **--nomount** } }

*COMMANDS* := { **show** | **list** | **pin** | **help** }

**bpftool link { show | list }** [*LINK*]
	  Show information about active links. If *LINK* is
	  specified show information only about given link,
	  otherwise list all links currently active on the system.

	  Output will start with link ID followed by link type and
	  zero or more named attributes, some of which depend on type
	  of link.

	  Since Linux 5.8 bpftool is able to discover information about
	  processes that hold open file descriptors (FDs) against BPF
	  links. On such kernels bpftool will automatically emit this
	  information as well.

**bpftool link pin** *LINK* *FILE*
	  Pin link *LINK* as *FILE*.

	  Note: *FILE* must be located in *bpffs* mount. It must not
	  contain a dot character ('.'), which is reserved for future
	  extensions of *bpffs*.

**bpftool link detach** *LINK*
	  Force-detach link *LINK*. BPF link and its underlying BPF
	  program will stay valid, but they will be detached from the
	  respective BPF hook and BPF link will transition into
	  a defunct state until last open file descriptor for that
	  link is closed.

**bpftool link help**
	  Print short help message.

.. include:: common_options.rst

-f, --bpffs
	  When showing BPF links, show file names of pinned
	  links.

-n, --nomount
	  Do not automatically attempt to mount any virtual file system
	  (such as tracefs or BPF virtual file system) when necessary.

10: cgroup  prog 25
        cgroup_id 614  attach_type egress
        pids test_progs(223)

[{
        "type": "cgroup",
        "prog_id": 25,
        "cgroup_id": 614,
        "attach_type": "egress",
        "pids": [{
                "pid": 223,
                "comm": "test_progs"
            }
        ]
    }
]

-rw------- 1 root root 0 Apr 23 21:39 link