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 service 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 commands are
multiple words and should be quoted to appear as a single argument to
allow Turn permission checking off (to simplify administration).
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.
Add user to /adm/users and make the standard directories
needed for booting.
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 files that have duplicated
blocks. The non-duplicate blocks can be retrieved by check‐
ing 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 present, creates an append only
file, creates a directory, and creates a file that is exclu‐
sync Write to disk all of the dirty blocks in the memory 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
stats Report statistics about the performance of the file system.
user Re-initialize authentication information by reading
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 reread.
Change the `console' to the named file system (default is the
chat Toggle tracing of 9P messages.
Check the file system and print summary information. The
c fix bad tags and clear the contents of the block.
d delete redundant references to a block, fix bad UTF
f rebuild the list of free blocks.
p print the names of directories as they are checked.
P print the names of all files as they are checked.
q quiet mode: report errors, but suppress summary infor‐
r read all of the data blocks and check the tags.
t fix bad tags.
w write all of the blocks that are touched.
Start a listener to serve the network at address, default
tcp!*!564. This feature is intended to facilitate small net‐
works 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 anything more than casual use.
When listening to the network, the default behavior 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.
SEE ALSOkfs(4), mkfs(8), prep(8), sd(3)KFSCMD(8)