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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 rc(1).
allow Turn permission checking off (to simplify administration).
allowoff
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
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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.
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newuser user
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Add user to /adm/users and make the standard directories needed
for booting.
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remove fileRemove 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 checking the
file system with option f (see below).
create file owner group mode [adl]
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Create the file. Owner and group are users in /adm/users and mode
is an octal number. If present, a creates an append only file,
d creates a directory, and l creates a file that is exclusive–use.
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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 accesses.
stats Report statistics about the performance of the file system.
user Re–initialize authentication information by reading /adm/users.
nowritegroup
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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.
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cfs filsys Change the `console' to the named file system (default
is the main system).
chat Toggle tracing of 9P messages.
check [cdfpPqrtw]
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Check the file system and print summary information. The options
are
c fix bad tags and clear the contents of the block.
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 checked.
P print the names of all files as they are checked.
q quiet mode: report errors, but suppress summary information
r read all of the data blocks and check the tags.
t fix bad tags.
w write all of the blocks that are touched.
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listen [address]
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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 anything more than casual use.
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noneattach
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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.
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