Since you didn't specify whether you are running on Windows or Unix I'll try to cover both.
Unix
bcp is located in $SYBASE/$SYBASE_OCS/bin/
Windows
bcp is located in %SYBASE%\%SYBASE_OCS%\bin
Export
bcp DB_NAME..TABLE_NAME out TABLE_NAME.bcp -Sservername -Uusername -Ppassword -[c or n]
Choose either -c or -n depending if you want the file to be human readable or not. I recommend using -n unless you have a compelling need to use -c TABLE_NAME.bcp can be any filename, with any extension.
Import
$SYBASE/$SYBASE_OCS/bin/bcp DB_NAME..TABLE_NAME in TABLE_NAME.bcp -Sservername -Uusername -Ppassword -[c or n]
There are many more options and flags available, but these are the basics to get it to work.
More information abou the bcp utility can be found here:
http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc30191.1570/html/utilityguide/BABGCCIC.htm
and
http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc30191.1570/html/utilityguide/X14951.htm
