How to use Tail,Head,More,less Commands ?

Tail Commands :-

tail  is used to  output the last part of files
# tail <filename>                         It willl list the last part of files.
# tail -f <filename>                     It will list the  output appended data as the file grows
#cat /var/log/messages |tail -5    It will list last 5 files

Head Commands :- 

head Is used to output the first part of files
#head <filename>
#cat /var/log/messages | head -5 

more Command :- 

more <filename>

Less Command :-

  less <filename>