KFSCMD(8)                                               KFSCMD(8)

          kfscmd, ksync - kfs administration

          disk/kfscmd [-n name] cmd ...


          Kfs is a local user-level file server for a Plan 9 terminal
          with a disk.  Kfscmd transmits commands to the kfs server
          (see kfs(4)). The -n option changes the name of the kfs ser-
          vice to kfs.name (by default, full name is just kfs).

          Ksync executes the sync command for all active kfs servers.

          The known commands are described below.  Note that some com-
          mands are multiple words and should be quoted to appear as a
          single argument to rc(1).

          allow     Turn permission checking off (to simplify adminis-


          disallow  Turn permission checking on.

          noauth    Disable authentication of users.

          halt      Write all changed blocks and stop the file system.

          start     The opposite of halt; restart the file system.

          help      Print the list of commands.

          rename file name
                    Change the name of file to name. Name may be a
                    single path element or a full path; if it is a
                    full path, every element along the path must exist
                    except the last.

          newuser user
                    Add user to /adm/users and make the standard
                    directories needed for booting.

          remove file
                    Remove file and place its blocks on the free list.

          clri file Remove file but do not place the blocks on the
                    free list.  This command can be used to remove

     KFSCMD(8)                                               KFSCMD(8)

                    files that have duplicated blocks.  The non-
                    duplicate blocks can be retrieved by checking the
                    file system with option f (see below).

          create file owner group mode [adl]
                    Create the file.  Owner and group are users in
                    /adm/users and mode is an octal number.  If pre-
                    sent, `a' creates an append only file, `d' creates
                    a directory, and `l' creates a file that is

          sync      Write to disk all of the dirty blocks in the mem-
                    ory cache.

          atime     Toggle whether atimes are updated as files and
                    directories are accessed.  By default, atimes are
                    updated.  On laptops it can be useful to turn off
                    atime updates to reduce disk accesses.

          stats     Report statistics about the performance of the
                    file system.

          user      Re-initialize authentication information by read-
                    ing /adm/users.

                    Each time kfs rereads /adm/users, it looks for a
                    group named write.  If such a group exists, then
                    the entire file system will appear read-only to
                    users not in the group.  If a write group exists
                    but no one is in it, it will be impossible to edit
                    /adm/users to correct the problem.  To resolve
                    this, the nowritegroup command turns off write
                    group checking until the next time /adm/users is

          cfs filsys
                    Change the `console' to the named file system
                    (default is the main system).

          chat      Toggle tracing of 9P messages.

          check [cdfpPqrtw]
                    Check the file system and print summary informa-
                    tion.  The options are
                    c    fix bad tags and clear the contents of the
                    d    delete redundant references to a block, fix
                         bad UTF filenames.
                    f    rebuild the list of free blocks.
                    p    print the names of directories as they are

     KFSCMD(8)                                               KFSCMD(8)

                    P    print the names of all files as they are
                    q    quiet mode: report errors, but suppress sum-
                         mary information
                    r    read all of the data blocks and check the
                    t    fix bad tags.
                    w    write all of the blocks that are touched.

          listen [address]
                    Start a listener to serve the network at address,
                    default tcp!*!564.  This feature is intended to
                    facilitate small networks of a couple machines in
                    the situation when convenience is more important
                    than performance.  This command is only useful on
                    machines with (possibly simulated) NVRAM, which
                    needs to be readable to the kfs processes; see
                    readnvram in authsrv(2). The production file
                    server (see fs(4)) is strongly encouraged for any-
                    thing more than casual use.

                    When listening to the network, the default behav-
                    ior is that the user none may only attach over
                    connections that have already authenticated as
                    someone else.  This prevents just anyone from
                    being able to dial your server and attach as none.
                    The noneattach command toggles whether none can
                    attach without such a chaperone.


          kfs(4), mkfs(8), prep(8), sd(3)