How to write a custom command on linux

I want to create a custom command on linux (ubantu) which I need to execute regularly.

steps are:

  1. create a shell-script
  2. place the shell script in /usr/bin/ dir
  3. name of shell-script file is custom command


I want kill node processes running by just typing “killnode”


#fileName /usr/bin/killnode

#echo "the folder is `pwd`"
#echo "The folder which contains files are `ls`"

nodeKaPids=`pidof node`
echo "Pids of node are: ${nodeKaPids}"
`kill -9 ${nodeKaPids}`
echo 'nodes are killed'

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