bash~ mkdir -p  /var/lib/pgsql/wals/
bash~ mkdir -p  /var/lib/pgsql/backups/
bash~ chown postgres:postgres -R /var/lib/pgsql/backups/
bash~ chown postgres:postgres -R /var/lib/pgsql/wals/

wal_level=archive
archive_mode=on
archive_command = 'test ! -f /var/lib/pgsql/wals/%f && cp %p /var/lib/pgsql/wals/%f'

su - postgres
psql -c "SELECT pg_start_backup('label');" postgres 
tar -C /var/lib/pgsql/data/ -czvf /var/lib/pgsql/backups/pg_basebackup_backup.tar.gz .
psql -c "SELECT pg_stop_backup();" postgres

bash~  su - postgres
bash~  createdb mydb
bash~  psql -s mydb

bash~ /etc/init.d/postgresql stop

bash~ cd /var/lib/pgsql/
bash~ rm -rf data/

bash~ /etc/init.d/postgresql initdb
bash~ /etc/init.d/postgresql start

bash~ /etc/init.d/postgresql stop

bash~  tar xvf /var/lib/pgsql/backups/pg_basebackup_backup.tar.gz -C /var/lib/pgsql/data

bash~ cd /var/lib/pgsql/data
bash~ cat recovery.conf 
restore_command = 'cp /var/lib/pgsql/wals/%f %p'

bash~ /etc/init.d/postgresql start

bash~ cd /var/lib/pgsql/data
bash~ cat recover.done