make Linux shell executable script in 3 steps!

open new file

syntetik@syntetik-desktop:~/Documents$ gedit my_cmd

1: edit

#!/usr/bin/python

def main():

print 'hello from my_cmd!'

main()

2: add executable permission

chmod +x my_cmd

get file path by typing pwd

syntetik@syntetik-desktop:~/Documents$ pwd

/home/syntetik/Documents

3: add this path to environment variable

export PATH=$PATH:/home/syntetik/Documents/

now you can run the script as a command

syntetik@syntetik-desktop:~/Documents$ my_cmd

hello from my_cmd!