How to Start/Stop CRS

As root - set enviornment ( . oraenv and at prompt enter grid and press enter)
# cd /ora01/grid/11.2.0.4/grid/bin
# . ./oraenv
Type in grid

To stop Grid
# crsctl stop crs (will do one node at a time)
# ./crs_stop -all   (this will shutdown grid on both nodes, use only if directed by DBA)

To start grid
# ./crsctl start crs

To disable grid autostart
# crsctl disable crs  # to disable

To enable grid autostart(whenever we need to enable and start, the sequence is first enable then start)
# crsctl enable crs   # to enable

To check the grid status
# crsctl config crs

###FOR STANDALONE ORACLE SERVERS###

crsctl disable has
crsctl config has
crsctl enable has
crs_stat -t -v

to stop
crsctl stop has -f

to start
crsctl start has