postgresql hot standby replication

snippet.txt

[1]
listen_addresses = 'localhost,IP_address_of_THIS_host'
wal_level = 'hot_standby'
archive_mode = on
archive_command = 'cd .'
max_wal_senders = 1
hot_standby = on

[2]
host    replication     rep     10.125.159.101/32  md5

[3]
host replication rep IP_address_of_slave/32 md5

[4]
listen_addresses = 'localhost,IP_address_of_THIS_host'
wal_level = 'hot_standby'
archive_mode = on
archive_command = 'cd .'
max_wal_senders = 1
hot_standby = on

[5]
psql -c "select pg_start_backup('initial_backup');"
rsync -cva --inplace --exclude=*pg_xlog* --exclude postmaster.pid --exclude server.* /var/lib/postgresql/9.1/main/ postgres@bjmirr:/var/lib/postgresql/9.1/main/
psql -c "select pg_stop_backup();"

[6]
sudo - postgres
pg_basebackup -h 10.125.159.101 -p 5432 -D /var/lib/postgresql/9.1/backup -U rep -v -P -x

[7]
vim /var/lib/postgresql/9.1/main/recovery.conf

standby_mode = 'on'
primary_conninfo = 'host=10.125.159.101 port=5432 user=rep password=xxx'
trigger_file = '/tmp/postgresql.trigger.5433'

[8]
kernel.shmmax = 536870912