NAME

       upclient - Initializes the client portion of the Update Server

SYNOPSIS

       upclient <hostname> [-crypt] [-clear] [-t <retry time>]
           [-verbose]* <dir>+ [-help]

DESCRIPTION

       The upclient command initializes the client portion of the Update Server. In the
       conventional configuration, its binary file is located in the /usr/lib/openafs directory
       on a file server machine.

       The upclient command is not normally issued at the command shell prompt but rather placed
       into a file server machine's /etc/openafs/BosConfig file with the bos create command. If
       it is ever issued at the command shell prompt, the issuer must be logged onto a database
       server machine as the local superuser "root".

       The upclient process periodically checks that all files in each local directory named by
       the dir argument match the files in the corresponding directory on the source machine
       named by the hostname argument. If a file does not match, the upclient process requests
       the source copy from the upserver process running on the source machine.

       By default, the upclient process requests that the upserver process encrypt the data
       before transferring it.  Use the -clear flag to request unencrypted transfer if
       appropriate. (The -crypt flag explicitly sets the default.)

       In the conventional configuration, separate instances of the upclient process request data
       from the /usr/lib/openafs and /etc/openafs/server directories, except on machines for
       which the system control machine is also the binary distribution machine for the machine's
       system type. The conventional names for the separate instances are "upclientbin" and
       "upclientetc" respectively.

       The upclient and upserver processes always mutually authenticate, whether or not the data
       they pass is encrypted; they use the key with the highest key version number in the
       /etc/openafs/server/KeyFile file to construct a server ticket for mutual authentication.

       This command does not use the syntax conventions of the AFS command suites. Provide the
       command name and all option names in full.

CAUTIONS

       Do not use the Update Server to distribute the contents of the /etc/openafs/server
       directory using the -clear option.  The contents of this directory are sensitive.

OPTIONS

       <hostname>
           Names either the cell's system control machine (if the requested directory is
           /etc/openafs/server), or the binary distribution machine for the local machine's CPU
           and operating system type (if the requested directory is /usr/lib/openafs).

       -crypt
           Requests the transfer of data from the upserver process in encrypted form. This is the
           default; this flag just sets the default explicitly.  Do not use this flag with the
           -clear flag.

       -clear
           Requests transfer of data from the upserver process in unencrypted form. Provide this
           flag or the -crypt flag, but not both.

       -t <retry time>
           Specifies how often to check for changes in each specified directory, as a number of
           seconds. If this argument is omitted, the default is 300 (5 minutes). This argument
           determines the maximum amount of time it takes for a change made on the source machine
           to propagate to this machine.

       -verbose*
           Writes a trace of the upclient process's operations on the standard output stream,
           which usually corresponds to the machine console. Provide one, two, or three instances
           of the flag; each additional instance generates increasingly numerous and detailed
           messages.

       <dir>+
           Names each directory to check for modified files. The conventional choices are the
           following:

           •   /usr/lib/openafs, in which case the recommended name for the process (assigned
               with the -instance argument to the bos create command) is "upclientbin". The
               hostname is the binary distribution machine for the local machine's system type.
               You may wish to use the -clear flag for the /usr/lib/openafs directory, since
               binaries are not particularly sensitive and encrypting them takes system
               resources.

           •   /etc/openafs/server, in which case the recommended name for the process (assigned
               with the -instance argument to the bos create command) is "upclientetc". The
               hostname is the cell's system control machine. Use the -crypt flag for the
               /etc/openafs/server directory, since it contains the KeyFile file and other data
               vital to cell security.

       -help
           Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following bos create command creates an "upclientbin" process on the machine
       "fs4.example.com" that refers to the machine "fs1.example.com" as the source for the
       /usr/lib/openafs directory (thus "fs1.example.com" is the binary distribution machine for
       machines of "fs4.example.com"'s type). The files in the /usr/lib/openafs directory are
       distributed every 120 seconds.  The command requests transfer in unencrypted form.

          % bos create  -server fs4.example.com -instance upclientbin -type simple \
                        -cmd "/usr/lib/openafs/upclient fs1.example.com -clear \
                        -t 120 /usr/lib/openafs"

PRIVILEGE REQUIRED

       The issuer must be logged in as the superuser "root" on a file server machine to issue the
       command at a command shell prompt. It is conventional instead to create and start the
       process by issuing the bos create command.

SEE ALSO

       BosConfig(5), bos_create(8), upserver(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted
       from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by
       Alf Wachsmann and Elizabeth Cassell.