term% ls -F
term% cat index.txt
CFS(4)                     Kernel Interfaces Manual                     CFS(4)

       cfs - cache file system

       cfs -s [-dknrS] [-f partition]

       cfs -a netaddr [-dknrS] [-f partition] [mtpt]

       cfs -F srvfile [-dknrS] [-f partition] [mtpt]

       Cfs is a user-level file server that caches data from remote files onto
       a local disk.  It is normally started  by  the  kernel  at  boot  time,
       though users may start it manually.  Cfs is interposed between the ker‐
       nel and a network connection to a remote file server to improve the ef‐
       ficiency of access across slow network connections such as modem lines.
       On each open of a file cfs checks the consistency of cached information
       and discards any old information for that file.

       Cfs mounts onto mtpt (default /) after connecting to the file server.

       The options are:

       a netaddr
              dial the destination netaddr to connect to a remote file server.
              Exclusive with -F.

       d      turn on debugging.

       f partition
              use file partition as the cache disk partition.

       F srvfile
              open srvfile (often a file under /srv) to connect  to  a  remote
              file server.  Exclusive with -a.

       k      keep  cache contents even if they might have come from a differ‐
              ent server.  Cfs will obey -r even if -k is given.

       n      mount the remote file server without authentication; often  use‐
              ful with -F.

       r      reformat the cache disk partition.

       s      the  connection to the remote file server is on file descriptors
              0 and 1.

       S      turn on statistics gathering.  A file called cfsctl at the  root
              of  the  caching  file system can be read to get statistics con‐
              cerning number of calls/bytes on client and server sides and la‐

       All  9P messages except read, clone, and walk (see intro(5)) are passed
       through cfs unchanged to the remote server.  If  possible,  a  read  is
       satisfied  by  cached  data.  Otherwise, the file server is queried for
       any missing data.

              Default file used for storing cached data.