Shell Script Introduction

Shell script usage

• Allow to run multiple commands together
• Allow if-else statements and loops
• Choose a file, create 1540 copies of it with different names and put those to different folders

Sequence of commands

• Ask file to copy
• Save file name in a variable
• Ask number of copies and locations to copy to
• Save those in other variables
• Create the desire folders
• Create a loop that copy the file, desired number of times in the desired locations

Edit and read script

Read more on Basic Bash

Change $PATH for a script

• Add the script files to the $PATH

var="newline${variable-name}"
echo ${variable-name}

• Add below into ~/.bashrc in droplet to define path to the script

# define my custom scripts
export PATH="/root/scripts:$PATH"

• Create name.sh file, add below content

#! /bin/bash
echo "what is your name"
read your-name
#2nd read option: 
#remove first 2 lines then: read -p "what is your name " your-name

echo "hello $yourname nice to meet you!"
echo -----------------------*

• Give the file an executable permission

chmod +x name.sh

• Once added, in terminal enter: name.sh, it just works in any directories.