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!