export whole database

The FULL parameter indicates that a complete database export is required. The following is an example of the full database export and import syntax.

    expdp system/password@db10g full=Y directory=TEST_DIR dumpfile=DB10G.dmp logfile=expdpDB10G.log

    impdp system/password@db10g full=Y directory=TEST_DIR dumpfile=DB10G.dmp logfile=impdpDB10G.log

reference from oracle-base

in your case, you just have to add

FULL=Y

in your parameter file, you don't need schemas clause

Please make it parfile way

Remember that directory here is an alias, pointing to some physical path.  It will require read write permissions inside the database: http://www.orafaq.com/wiki/Datapump.

We name this file exportjob.par

and go to the os level
and give

nohup exportjob.par


Is that enough..

nohup $ORACLE_HOME/bin/expdp parfile=<some path to the directory for>par_file.par

Assuming your other ORACLE environment variables are right....  I generally don't use the nohup option, as there's an internal way to monitor status.  Your call.

nohup $ORACLE_HOME/bin/expdp parfile=exportjob.par
This suffices as per your file name

Agree with dvz
There is an option in Dba_datapump_jobs data dictionary to check progress of data pump job
Anyway its ur call.. if you wish to monitor the process at is level its fine

@wasimibm -- doesn't your syntax imply that the parameter file is in the default directory?
We may be confusing one another with the author's question (ID: 39989754).

Yeah may be.. let's leave it out for authors knowledge.. I logged in from my mobile.. was bit slow in typing.. haven't seen your first comment.. after I saw it posted another one which I agreed with you..
@Tony -try out and we are there in case of any further help ...!!!

You might have changed the requirement a little bit now and would have asked out this probably

https://www.experts-exchange.com/questions/28409087/all-schema-export.html

probably, you better explore data pump utility as a whole, you can find a lot of interesting things with many options

all schemas is as good as whole data base, however you can do that, instead of
full=y

you have use schemas clause like
schemas=schema1,schema2

eg:
schemas=scott,hr,system

and for par file

userid=system/<password>
directory=DATA_PUMP_DIR
dumpfile=expdp_PCHARTKWT_FCHARTKWT_04022014.dmp
logfile=expdp_PCHARTKWT_FCHARTKWT_04022014.log
schemas=system,scott,hr

For Startup's there is a good site, which shows illustration with commands,

http://www.oracle-base.com/articles/10g/oracle-data-pump-10g.php
check this out in your free time

I've requested that this question be closed as follows:

Accepted answer: 500 points for wasimibm's comment #a39989402

for the following reason:

This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

The asker's question migrated over the life of this thread. As your award to wasimibm for a revised answer ID: 39989402, one of my contributions, ID: 39989764, answers the author in ID: 39989754.

Please reconsider a split.

I agree ..!!!
dvz comment to be accepted as an assisted solution

Could you accept this ID: 39989402  and give him 500 points.