Ubuntu – Run executable file on terminal

bashcommand line

I'm new to Ubuntu and currently on it because of assignment. I would like to ask few questions:

How do I make new command to run a shell script?
For example, when you type passwd on terminal it runs the executable file on /usr/bin/passwd.
How do I make it the same like my file?
How do I change my shell script into a executable file like the passwd?

Your script should look like:

#!/bin/bash

passwd

Save it in a file, let say password.sh or simple password, then make it executable using next commands in terminal:

cd /path/to/password.sh  #or cd /path/to/password
chmod +x password.sh     #or chmod +x password

To run it from terminal, just use the following command:

./password.sh            #or ./password

/path/to/password.sh     #or /path/to/password

To run it only using:

password.sh              #or password

you must to add the path of the script to the PATH. See How to add a directory to the PATH? in this sense.

There are two things you need to do:

Reference the script interpreter at the beginning of the script:
```
#!/bin/bash
```
Set the permissions to make it executable:
```
chmod +x myscript.sh
```

you can use script in following manner

#!/bin/bash
clear    
for var in "$@"
  do
    shred -n 3 -zvfu "$var"
  done

Or A shorter version

#!/bin/bash
clear    
for var
  do
    shred -n 3 -zvfu "$var"
  done

Run your script followed by the file name you want to shred. You can use multiple file separated by space.