uberftp.1

.\" @(#)uberftp.1c 1.34 90/02/15 SMI; from UCB 4.3
.TH UBERFTP 1 "22 Jul 2022"
.SH NAME
uberftp \- GridFTP-enabled client
.SH SYNOPSIS
.B uberftp
.RB [options]
.RB [host
.RB options]
.RB [\fIhost\fR]

.B uberftp
.RB [options]
.RB [host
.RB options]
.RB host
\*(lq\fIcmd\fR\*(rq

.B uberftp
.RB [options]
\fIsrcurl\fR
\fIdsturl\fR

.B uberftp
.RB [options]
.RB -f 
\fIurlfile\fR

.B uberftp
.RB [options]
.RB -cmd
\fIurl\fR

.SH DESCRIPTION
.IX "uberftp command"  ""  "\fLuberftp\fP \(em file transfer"
.IX GridFTP grid files transfer
.IX "file transfer protocol"  "uberftp command"  ""  "\fLuberftp\fP command"
.LP
.B uberftp 
is a GridFTP-enabled client that supports both interactive use and 
FTP commands on the \fBuberftp\fR command line to transfer files between two 
computers. It is intended for use with computers that have a GridFTP 
server installed. \fBUberftp\fR supports GSI authentication, parallel data
channels and striping. For more information about GridFTP, see the GridFTP
URL in the "SEE ALSO" section below.

Only the first usage shown above will create an interactive session. If
\fIhost\fR is specified,
.B uberftp
immediately attempts to establish a connection to the
.SM GridFTP
server on 
\fIhost\fR, 
enters its command interpreter and awaits commands from the user. If
\fIhost\fR is not specified,
.B uberftp
immediately drops into the command interpreter without connecting to any
.SM GridFTP
server.

The second usage option denotes a non interactive session in which
\*(lq\fIcmd\fR\*(rq
is a series of one or more commands as described in the 
.B COMMANDS
section below to run once the control connection is established. These 
commands are run exactly as if they had been entered from the interactive
prompt. This list must be enclosed in quotes. Multiple commands
are semicolon or comma delimited. uberftp will execute these commands and
then exit.
.B Uberftp
will exit upon the first error encountered.

The third and forth usage statements use the URL style format for specifying
the source and destination for the files to transfer. The third usage statement
places these URLs on the command line. The forth usage allows the user to 
specify multiple URL pairs in a separate file for
.B Uberftp
to transfer one at a time. The supported URL syntaxes are gsiftp://[user@]host[:port]/file,
ftp://[user[:pass]@]host[:port]/file and file://path.

The fifth usage statement allows for commands that take pathnames to accept
URLs instead. The allowable commands are listed in the
.B -cmds
section below.

.SH HOST OPTIONS
.TP
.B \-P \fIport\fR
Connect to \fIport\fR instead of the default. The default for GSI 
authentication is 2811. The default for password authentication
is 21.
.TP
.B \-u \fIuser\fR
Connect as \fIuser\fR. This is useful for both password and GSI
authentication mechanisms.
.TP
.B \-p \fIpass\fR
Use \fIpass\fR when authenticating. If \fIpass\fR equals X, UberFTP will
prompt for the password with character echoing turned off.


.SH OPTIONS
.TP
.B \-active
Use ACTIVE mode for data transfers.
.TP
.B \-ascii
Use ASCII mode for data transfers.
.TP
.B \-binary
Use BINARY mode for data transfers.
.TP
.B \-blksize \fIn\fR
Set the internal buffer size to \fIn\fR.
.TP
.B \-cksum [\fIon\fR|\fIoff\fR]
Enable/Disable CRC checks after file transfers.
.TP
.B \-cos \fIname\fR
Set the storage class of service to \fIname\fR. Used with HPSS installations.
Use the class of service name \fIdefault\fR to allow the remote
server to decide which class of service to use.
.TP
.B \-d
Enable debugging. Same as '-debug 3'. Deprecated.
.TP
.B \-debug \fIn\fR
Set the debug level to \fIn\fR.
.TP
.B \-family \fIname\fR
Set the storage family to \fIname\fR. Use the family name \fIdefault\fR to allow the remote
server to decide which family to use.
.TP
.B \-glob [\fIon\fR|\fIoff\fR]
Enable/Disable filename expansion.
.TP
.B \-hash
Enable printing of hash marks during transfers.
.TP
.B \-keepalive \fIn\fR
Send control channel keepalive messages every \fIn\fR seconds
during data transfers.
.TP
.B \-mode [\fIE\fR|\fIS\fR]
Switch the transfer mode to extended block (\fIE\fR) or
streams mode (\fIS\fR).
.TP
.B \-parallel \fIn\fR
Use \fIn\fR parallel data channels during extended block transfers.
.TP
.B \-passive
Use PASSIVE mode for data transfers.
.TP
.B \-pbsz \fIn\fR
Set the data protection buffer size to \fIn\fR n bytes.
.TP
.B \-prot [\fIC\fR|\fIS\fR|\fIE\fR|\fIP\fR]
Set the data protection lelvel to clear (\fIC\fR), safe (\fIS\fR),
confidential (\fIE\fR) or private (\fIP\fR).
.TP
.B \-retry \fIn\fR
Retry commands that fail with transient errors \fIn\fR times.
.TP
.B \-resume \fIpath\fR
Retry the recursive transfer starting at \fIpath\fR.
.TP
.B \-tcpbuf \fIn\fR
Set the TCP read/write buffers to \fIn\fR bytes.
.TP
.B \-wait
This will cause the client to wait for remote files to stage before
attempting to transfer them.
.TP
.B \-v
Print UberFTP version information and exit.
.TP
.B \-version
Print UberFTP version information and exit.
.TP
.B \-versions
Print version information about all used globus modules and exit.

.SH Supported \-cmds
.TP
.B \-cat \fIurl\fR
Print to stdout the contents of the remote file. See \fBCAT BEHAVIOUR\fR below for
details about the behaviour of this functionality.
.TP
.B \-chgrp [\fI-r\fR] \fIgroup\fR \fIurl\fR
Set the group ownership of the remote object(s).
.TP
.B \-chmod [\fI-r\fR] \fIperms\fR \fIurl\fR
Set the permissions of the remote object(s).
.TP
.B \-dir [\fI-r\fR] \fIurl\fR
List the contents of the remote object.
.TP
.B \-link \fIurl\fR \fIpath\fR
Create a hardlink named <path> to the remote object.
.TP
.B \-ls [\fI-r\fR] \fIurl\fR
List the contents of the remote object.
.TP
.B \-mkdir \fIurl\fR
Create the remote directory.
.TP
.B \-rename \fIurl\fR \fIpath\fR
Rename the remote object to the given path.
.TP
.B \-rm [\fI-r\fR] \fIurl\fR
Remove the remote object(s).
.TP
.B \-rmdir \fIurl\fR
Remove the remote directory.
.TP
.B \-size \fIurl\fR
Return the size of the remote object.
.TP
.B \-stage [\fI-r\fR] \fIseconds\fR \fIurl\fR
Attempt to stage the remote object(s) over the time
period given in seconds.
.TP
.B \-symlink \fIurl\fR \fIpath\fR
Create a symlink named <path> to the remote object.

.SH DEFAULT TRANSFER MODE
.LP
By default, without any special environment variables, command line options
or commands, \fBuberftp\fR will transfer files in PASSIVE STREAMS mode.
PASSIVE means that the client will initiate the data connection which is
useful for users behind firewalls. STREAMS mode implies that GRIDFTP features
including striping and parallel data connections are not used. In order to
take advantage of these features with GridFTP capable servers, you must either
change the mode directly using \-m command line switch or the 
.B mode
interactive command, or you can change the mode indirectly by specifying 
more than one parallel data connection using the \-c command line switch or
by using the
.B parallel
interactive command.

.SH GETTING YOUR GSI PROXY
.LP
.B By default, \fBuberftp\fR requires a GSI certificate. If you do not 
already have a certificate, see the following web page to learn how to get one:

http://www.ncsa.uiuc.edu/UserInfo/Grid/Security/GetUserCert.html

Once you have a certificate, use the \fBgrid-proxy-init\fR command to get
a valid proxy.

.SH COMMANDS
.TP
.B ! [\fIcommand\fR]
Run the command using a shell on the local machine. If no command is given,
invoke an interactive shell.
.TP
.B ? [\fIcommand\fR]
If \fIcommand\fR is given, print a (hopefully) helpful blurb about it.
Otherwise, list all commands.
.TP
.B active
Change to ACTIVE mode which causes the server to initiate the data
connection. The default is PASSIVE mode unless the variable
UBERFTP_ACTIVE_MODE is set in the environment. If you are behind a
firewall you must use PASSIVE mode.
.TP
.B ascii
Change the data transfer type to ASCII which causes the server to do some
simple transformations to the file being transferred. This is mostly useful
for changing EOL (end of line) in text files when moving between platforms.
This option is almost never necessary today. The default is BINARY mode
also known as IMAGE mode.
.TP
.B binary
Change the data transfer type to BINARY (aka IMAGE) which causes the server
to not perform transformations to the file being transferred. This is the
default and is faster than an ASCII transfer.
.TP
.B blksize \fIsize\fR
Change the size of the memory buffer used to read and write data to disks
to \fIsize\fR bytes. The default block size is 1024*1024 (1048576) bytes but it can be changed at compile time. The
block size can be increased to improve file transfer performance. This is
not related to the extended block mode block size used to determine the
ratio of data to header for data transferred on the data channel.
.TP
.B bugs
Prints information regarding bug reporting and feature requests.
.TP
.B bye
Close all control and data connections and exit.
.TP
.B cat \fIfile1\fR [\fIfile2\fR ... \fIfilen\fR]
Print the contents of the remote file(s) to stdout. See \fBCAT BEHAVIOUR\fR below for
details about the behaviour of this functionality.
.TP
.B cdup
Change the remote working directory up one level.
.TP
.B cd [\fIdir\fR]
Change the remote working directory to \fIdir\fR. If \fIdir\fR is not given,
the client will make every attempt to change to the user's home directory.
'~' expansion and '-' previous directory are supported.

.TP
.B chgrp [\fI-r\fR] \fIgroup\fR \fIobject\fR [\fIobject2\fR ... \fIobjectn\fR]
Change group ownership on the remote object(s).
.br
\fI-r\fR   Recursively chgrp everything in the given directory.

.TP
.B chmod [\fI-r\fR] \fIperms\fR \fIobject\fR [\fIobject2\fR ... \fIobjectn\fR]
Change permissions on the remote object(s).
.br
\fI-r\fR   Recursively chmod everything in the given directory.
.TP
.B close
Close the control connection to the remote host.
.TP
.B cksum [\fIon\fR|\fIoff\fR]
Enable file cksum comparison after each file transfer. This only works with
NCSA's mass storage system.
.br
\fIon\fR    Enable checksum comparison
.br
\fIoff\fR   Disable checksum comparison
.TP
.B cos \fIname\fR
Sets the HPSS class of service to \fIname\fR on the FTP service if the service
supports it. If \fIname\fR is omitted, the current class of service is printed.
Use the class of service name \fIdefault\fR to allow the remote
server to decide which class of service to use.
.TP
.B dcau [\fIN\fR|\fIA\fR|\fIS\fR \fIsubject\fR]
Change the data channel authentication settings. If the service does not
support DCAU, these settings are ignored.
.br
\fIN\fR  Disabled dcau.
.br
\fIA\fR  Expect the remote identity to be mine. (Default)
.br
\fIS\fR \fIsubject\fR Expect the remote identity to be \fIsubject\fR.
.TP
.B debug [\fI0-3\fR]
Turn debug statements on/off. If no value is given, this command will
toggle between debug(2) and non debug(1) mode. Otherwise the debug level
is set to the given level.
.br
0  Only errors are printed
.br
1  Default. Errors and some helpful messages are printed
.br
2  Print useful control channel information
.br
3  Print all information
.TP
.B family \fIname\fR
Sets the tape family to \fIname\fR on the FTP service if the service
supports it. If \fIname\fR is omitted, the current family is printed.
Use the family name \fIdefault\fR to allow the remote
server to decide which family to use.
.TP
.B glob [\fIon\fR|\fIoff\fR]
Enable or disable filename globbing. If no option is given, this command
will toggle the current setting.
.br
\fIon\fR    Enable filename globbing
.br
\fIoff\fR   Disable filename globbing
.TP
.B dir [\fI-r\fR] [\fItarget\fR]
List the contents of the remote target directory. If \fItarget\fR is not given,
then the current working directory is used.
.br
\fI-r\fR      Recursively list \fItarget\fR.
.br
\fItarget\fR  Directory or file to list. '.' is used by default.
.TP
.B get [\fI-r\fR] \fIsource\fR [\fIdestination\fR]
Retrieve file(s) from the remote service. If \fIsource\fR implies multiple
transfers, either through regular expressions or by using the recursive
feature, then \fIdestination\fR must be a directory. If \fIdestination\fR is not
specified, \fIsource\fR is used.
.br
\fI-r\fR   Recursively transfer the given directory.
.TP
.B hash
Print hash marks during data transfers. This does not work during third
party transfers.
.TP
.B help [\fIcommand\fR]
If \fIcommand\fR is given, print a helpful blurb about \fIcommand\fR.
Otherwise, list all commands.
.TP
.B keepalive [\fIseconds\fR]
Attempts to keep the control channel from being blocked by firewalls during
long data channel operations. UberFTP sends a NOOP command to the service
at intervals equal to the specified number of \fIseconds\fR. Setting it to zero
will disable keepalive. If \fIseconds\fR are not given, the current timeout is
displayed. This feature is disabled by default.
.br
seconds  number of seconds between NOOPs. Disabled if zero.
.TP
.B lcat \fIfile1\fR [\fIfile2\fR ... \fIfilen\fR]
Print the contents of the local file(s) to stdout. See \fBCAT BEHAVIOUR\fR below for
details about the behaviour of this functionality.
.TP
.B lcd [\fIdir\fR]
Change the local working directory to \fIdir\fR. If \fIdir\fR is not given,
the client will make every attempt to change to the user's home directory.
'~' expansion and '-' previous directory are supported.
.TP
.B lcdup
Change the local working directory up one level.
.TP
.B lchgrp [\fI-r\fR] \fIgroup\fR \fIobject\fR [\fIobject2\fR ... \fIobjectn\fR]
Change group ownership on the local object(s).
.br
\fI-r\fR   Recursively chgrp everything in the given directory.

.TP
.B lchmod [\fI-r\fR] \fIperms\fR \fIobject\fR [\fIobject2\fR ... \fIobjectn\fR]
Change permissions on the local object(s).
.br
\fI-r\fR   Recursively chmod everything in the given directory.
.TP
.B lclose
Close the control connection to the local host.
.TP
.B ldir [\fI-r\fR] [\fItarget\fR]
List the contents of the local \fItarget\fR directory. If \fItarget\fR is not given,
then the current working directory is used.
.br
\fI-r\fR      Recursively list \fItarget\fR.
.br
target  Directory or file to list. '.' is used by default.
.TP
.B link [\fIoldfile\fR] [\fInewfile\fR]
Create a hardlink to oldfile named newfile on the remote service.
.TP
.B llink [\fIoldfile\fR] [\fInewfile\fR]
Create a hardlink to oldfile named newfile on the local service.
.TP
.B lls [\fI-r\fR] [\fItarget\fR]
List the contents of the local \fItarget\fR directory. If \fItarget\fR is not given,
then the current working directory is used.
.br
\fI-r\fR      Recursively list \fItarget\fR.
.br
target  Directory or file to list. '.' is used by default.
.TP
.B llscos
List the available class of services on the local server (HPSS only).
.TP
.B llsfam
List the available tape families on the local server (HPSS only).
.TP
.B lmkdir  \fIdir1\fR [\fIdir2\fR ... \fIdirn\fR]
Create the local directory(ies).
.TP
.B lopen [\fI-P port\fR] [\fI-u user\fR] [\fI-p pass\fR | \fIX\fR] \fIhost\fR
Opens a control channel to \fIhost\fR and that host becomes the 'local' machine.
After using lopen, all local (l*) commands perform their respective
operations on \fIhost\fR rather than the local machine. This is how third
party transfers are accomplished. GSI authentication is used unless the
\fI-p\fR option is used.
.br
\fI-P port\fR   Connect to port (Default 2811 for GSI, 21 for password).
.br
\fI-u user\fR   Connect as alternate user.
.br
\fI-p pass\fR | \fIX\fR
.br
          Use password \fIpass\fR when authenticating with \fIhost\fR.
.br
          If \fIpass\fR equals \fIX\fR, read the password from STDIN with
.br
          character echoing turned off.
.br
\fIhost\fR      Connect to \fIhost\fR.
.TP
.B lpwd
Prints the current local working directory.
.TP
.B lrename \fIsrc\fR \fIdst\fR
Rename the local object \fIsrc\fR to \fIdst\fR.
.TP
.B lrm [\fI-r\fR] \fIobject1\fR [\fIobject1\fR...\fIobjectn\fR]
Removes the local file system object(s).
.br
\fI-r\fR   Recursively remove the given directory.
.TP
.B lrmdir \fIdir1\fR [\fIdir2\fR...\fIdirn\fR]
Removes the given directories from the local service.
.TP
.B lquote \fIcmd\fR
Pass \fIcmd\fR to the local FTP service. This allows the user to use
server-specific commands that are not available through the uberftp
interface.
.TP
.B ls [\fI-r\fR] [\fItarget\fR]
List the contents of the remote target directory. If [\fItarget\fR] is not given,
then the current working directory is used.
.br
\fI-r\fR      Recursively list \fItarget\fR.
.br
\fItarget\fR  Directory or file to list. '.' is used by default.
.TP
.B lscos
List the available class of services on the remote server (HPSS only).
.TP
.B lsfam
List the available tape families on the remote server (HPSS only).
.TP
.B lsize \fIfile1\fR [\fIfile2\fR...\fIfilen\fR]
Prints the size of the given object(s).
.TP
.B lstage [\fI-r\fR] \fIseconds\fR \fIobject1\fR [\fIobject2\fR...\fIobjectn\fR]
Attempt to stage all matching files within the given number of \fIseconds\fR
on the local service.
.br
seconds  number of seconds to attempt staging
.br
\fI-r\fR       Recursively stage all files in the given subdirectory.
.TP
.B lsymlink [\fIoldfile\fR] [\fInewfile\fR]
Create a symlink to oldfile named newfile on the local service.
.TP
.B mput [\fI-r\fR] \fIobject1\fR [\fIobject2\fR...\fIobjectn\fR]
Retrieve file(s) from the remote service. This is similiar to making
multiple calls to get without specifying a destination.
.br
\fI-r\fR   Recursively transfer the given directory.
.TP
.B mkdir \fIdir\fR
Create the remote directory.
.TP
.B mode [\fIE\fR|\fIS\fR]
Toggle the data transfer mode between Streams mode and Extended Block
mode. The default is Streams mode. If no option is given, it will
display the current mode.
.br
E   Extended block mode
.br
S   Streams mode
.TP
.B mput [\fI-r\fR] \fIobject1\fR [\fIobject2\fR...\fIobjectn\fR]
Store file(s) to the remote service. This is similiar to making
multiple calls to put without specifying a destination.
.br
\fI-r\fR   Recursively transfer the given directory.
.TP
.B open [\fI-P port\fR] [\fI-u user\fR] [\fI-p pass\fR | \fIX\fR] \fIhost\fR
Opens a control channel to \fIhost\fR and that host becomes the 'remote'
machine. GSI authentication is used unless the -p option is used.
.br
\fI-P port\fR   Connect to \fIport\fR (Default 2811 for GSI, 21 for password).
.br
\fI-u user\fR   Connect as \fIuser\fR.
.br
\fI-p pass\fR | \fIX\fR
.br
          Use password \fIpass\fR when authenticating with \fIhost\fR.
.br
          If \fIpass\fR equals \fIX\fR, read the password from STDIN with
.br
          character echoing turned off.
.br
\fIhost\fR      Connect to \fIhost\fR.
.TP
.B order [\fItype\fR]
Changes the order of lists returned from ls and lls to the given scheme.
If \fItype\fR is not given, the current order is displayed.
.br
\fItype\fR    Ordering scheme to use. Value options are:
.br
           none  Do not order listings
.br
           name  Order listings by name
.br
           size  Order listings by size
.br
           type  Order listings by type
.TP
.B parallel [\fInumber\fR]
Set the number of parallel data connections to \fInumber\fR. This is only
useful for extended block mode transfers. The default number of data
connections is one. If no number is given, the current setting for the
number of parallel connects is printed.
.TP
.B passive
Change to PASSIVE mode which causes the client to initiate the data
connection. This is the default mode unless the variable
UBERFTP_ACTIVE_MODE is set in the environment. If you are behind a
firewall you must use PASSIVE mode.
.TP
.B pbsz [\fIsize\fR]
Change the length of the protection buffer. The protection buffer is used
to encrypt data on the data channel. The length of the protection buffer
represents the largest encoded message that is allowed on the data channel.
By default, the protection buffer is grown to match the internal buffer
used. For efficient transfers, pbsz should be sufficiently larger than
blksize so that the wrapped buffer fits within the protection buffer.
Otherwise, the blksize buffer is broken into multiple pieces so that each
write is less than pbsz when wrapped. If \fIpbsz\fR is not given, the
current size is displayed.
.br
\fIsize\fR   length of protection buffer. 0 will set it to its default.
.TP
.B pget \fIoffset\fR \fIsize\fR \fIsrcfile\fR [\fIdestfile\fR]
Retrieve only the specified portion of the file(s). If srcfile is a regular
expression and expands to multiple files, and destination is given,
destination must refer to a directory.
.br
\fIoffset\fR   Offset within the file
.br
\fIsize\fR     Amount of data to retrieve
.br
\fIsrcfile\fR  Name of remote file
.br
\fIdestfile\fR Name of local file. srcfile is used if destfile
.br
is not specified
.TP
.B pput \fIoffset\fR \fIsize\fR \fIsrcfile\fR [\fIdestfile\fR]
Store only the specified portion of the file(s). If srcfile is a regular
expression and expands to multiple files, and destination is given,
destination must refer to a directory.
.br
\fIoffset\fR   Offset within the file
.br
\fIsize\fR     Amount of data to retrieve
.br
\fIsrcfile\fR  Name of local file
.br
\fIdestfile\fR Name of remote file. srcfile is used if destfile
.br
         is not specified
.TP
.B prot [\fIC\fR|\fIS\fR|\fIE\fR|\fIP\fR]
This command configures the level of security on the data channel after
data channel authentication has completed. Clear means that the data will
not be protected. Safe means that the data will be integrity protected
meaning that altered data will be detected. Confidential means that the data
will be unreadable to third parties. Private mode means the data will be
confidential and safe.
.br
\fIC\fR  Set protection level to clear.
.br
\fIS\fR  Set protection level to safe.
.br
\fIE\fR  Set protection level to confidential.
.br
\fIP\fR  Set protection level to private.
.TP
.B put [\fI-r\fR] \fIsource\fR [\fIdestination\fR]
Store file(s) to the remote service. If \fIsource\fR implies multiple
transfers, either through regular expressions or by using the recursive
feature, then \fIdestination\fR must be a directory. If \fIdestination\fR is not
specified, \fIsource\fR is used.
.br
\fI-r\fR   Recursively transfer the given directory.
.TP
.B pwd
Prints the current working directory.
.TP
.B quit
Close all control and data connections and exit.
.TP
.B quote \fIcmd\fR
Pass \fIcmd\fR to the remote FTP service. This allows the user to use
server-specific commands that are not available through the uberftp
interface.
.TP
.B rename \fIsrc\fR \fIdst\fR
Rename the remote object \fIsrc\fR to \fIdst\fR.
.TP
.B retry [\fIcnt\fR]
Configures retry on failed commands that have transient errors. \fIcnt\fR
represents the number of times a failed command is retried. A value of
zero effectively disables retry. Zero is the default. If no value is given
the current setting is displayed.
.br
\fIcnt\fR    Number of times a failed command is retried.
.TP
.B resume [\fI-d\fR] \fIpath\fR
Sets a restart point for recursive transfers. If a long recursive transfer
fails, you can set resume to the path that failed and UberFTP will skip
all file and directory creations up to the given path.
.br
\fIpath\fR   Path to resume transfer at. If \fIpath\fR is not given, print the current
.br
       resume target.
.br
\fI-d\fR     Remove the current resume path.
.TP
.B rm [\fI-r\fR] \fIobject1\fR [\fIobject1\fR...\fIobjectn\fR]
Removes the remote file system object(s).
.br
\fI-r\fR   Recursively remove the given directory.
.TP
.B rmdir \fIdir1\fR [\fIdir2\fR...\fIdirn\fR]
Removes the given directories from the remote service.
.TP
.B runique
Toggles the client to store files using unique names during put operations.
.TP
.B size \fIfile1\fR [\fIfile2\fR...\fIfilen\fR]
Prints the size of the given object(s).
.TP
.B stage [\fI-r\fR] \fIseconds\fR \fIobject1\fR [\fIobject2\fR...\fIobjectn\fR]
Attempt to stage all matching files within the given number of seconds
on the remote service.
.br
\fIseconds\fR  number of seconds to attempt staging
.br
\fI-r\fR       Recursively stage all files in the given subdirectory.
.TP
.B sunique
Toggles the client to store files using unique names during get operations.
.TP
.B symlink [\fIoldfile\fR] [\fInewfile\fR]
Create a symlink to oldfile named newfile on the remote service.
.TP
.B tcpbuf [\fIsize\fR]
Set the data channel TCP buffer size to \fIsize\fR bytes. If \fIsize\fR is not
given, the current TCP buffer size will be printed.
.TP
.B versions
Prints the versions of all Globus modules being used.
.TP
.B wait
Toggles whether the client should wait for files to stage before attempting
to retrieve them.


.SH IMPROVING FILE TRANSFER PERFORMANCE
.LP
Use the \fBactive\fR command to enable \fIactive\fR mode FTP when 
using NCSA's UniTree mass storage system if possible since it 
will give much better file transfer performance.
When tranferring files over long distances, use a large value (for example, 
16777216) for \fBtcpbuf\fR.
When there is high network traffic, you may be able to improve 
performance using the \fBparallel\fR command to increase the number of
parallel data connections to 2-4.
.SH THIRD-PARTY TRANSFERS
.LP
In order to perform a third-party transfer, you must log into two 
\fBFTP\fR servers. Typically, you connect to a single \fBFTP\fR service to 
"get" files to the local machine and "put" files to the remote service. 
For third-party transfers, you must connect to a second service 
thereby replacing the former local machine. In \fBUberFTP\fR terminology, 
it is referred to as "opening a new local service" since, from 
the perspective of the user, the new local service will appear 
as though the user initiated the FTP session from that machine. 

All remote service commands have "l*" counterparts that allow you 
to specify that the command is to be performed on the local service, 
whether that service is the local machine or a new local service. 
So to open a new local service, use the "l*" version of the open command: 

  UberFTP> lopen mss.ncsa.teragrid.org
  UberFTP> lclose
      
Once you have connected to both services, files can be transferred as 
before with the change that files you "get" go to the new local service 
and files you "put" are sent from the new local service. 
.SH CONTROLLING EPHEMERAL PORT SELECTION
.LP
By default, local port selection is managed by the operating system. However,
you may wish to specify which ports UberFTP should use for incoming and 
out going connections. This is useful when dealing with firewalls.

Setting UBERFTP_TCP_PORT_RANGE in your environment will cause all inbound
connections to use the specified port range. Likewise, setting
UBERFTP_TCP_SOURCE_RANGE in your environment will cause all outbound connections
to use the specified port range.

The environment variables GLOBUS_TCP_PORT_RANGE and GLOBUS_TCP_SOURCE_RANGE
will also control the ephemeral port selection. These variables behave exactly
as their UBERFTP counterparts and are available for backwards compatibility with
older versions. The UBERFTP variables take precedence over the GLOBUS variables.

The values of the variables specify a port range, a minimum port number and a
maximum port number, separated by either a comma or a space. For example, to
set the inbound port range, you would set:

  UBERFTP_TCP_PORT_RANGE=40000,50000

Using the space delimiter, this format is also acceptable:

  UBERFTP_TCP_PORT_RANGE="40000 50000"

See your shell documentation for the proper syntax for settings variables within
your environment.

Setting the ephemeral port range to an unusable range will cause UberFTP connections
to fail. For instance, setting a port range from 10 to 100 with a non root process will
fail on most operating systems.

.SH CAT BEHAVIOUR
.LP
UberFTP 2.9.1 comes with an additional environment variable:

  UBERFTP_CAT_CORRECT

If this environment variable is present UberFTP omits the odd newline that is
otherwise printed out in addition to the file contents by the \fBcat\fR
functionality of previous versions of UberFTP for non-empty files. If it is not
present, the old behaviour is used for compatibility reasons. The content of
this environment variable is not evaluated, just its presence in your
environment. Also see:

  https://github.com/gridcf/UberFTP/issues/22

.SH EXIT VALUES
.LP
UberFTP will exit with a value of 0 if no errors occurred during the session,
otherwise it will exit with a value of 1. In non interactive, commandline mode,
it will exit after the first error occurs.
.SH EXAMPLES
.LP
Set the environment variable to set \fIactive\fR mode FTP 
(improves file transfer performance to the mass storage system).
Connect to NCSA's UniTree mass storage system interactively from 
NCSA's TeraGrid cluster:

  setenv UBERFTP_ACTIVE_MODE on
  % uberftp mss.ncsa.teragrid.org
  ...
  220 UNIX Archive FTP server ready.
  230 User consult logged in.
  UberFTP>

Use the command-line interface to copy a file from NCSA's TeraGrid cluster 
to the UniTree mass storage system. (There is no need to set
\fBtcpbuf\fR since it is over a LAN but \fIactive\fR mode is turned on
to improve file transfer performance to the mass storage system.):

  uberftp mss.ncsa.teragrid.org \\
     "active; cd work; get file.tar"

Copy a file from SDSC's TeraGrid cluster to NCSA's TeraGrid cluster.
(Note that \fBtcpbuf\fR is set to 16777216 since there is a long
network latency between NCSA and SDSC):

  uberftp tg-gridftp.sdsc.teragrid.org \\
     "tcpbuf 16777216; cd scr; put file.tar"
.SH "SEE ALSO"
.BR mssftp (1),
.BR msscmd (1),
.BR ftp (1),
.br
GridFTP:
.br
  https://gridcf.org/gct-docs/latest/gridftp/
.br
TCP Window Size:
.br
  http://www.vonwelch.com/report/tcp_windows/
  http://www.psc.edu/tcp-tune
.br
Active vs. Passive FTP: 
.br
  http://slacksite.com/other/ftp.html

\fBNote: The links above are not under the GridCF's control
so they may become obsolete.\fR