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Anthony Reyes
Anthony Reyes

Posted on • Updated on

Basic Bash Scripting

#bash #beginners #scripting

Bash is a command language interpreter. It is widely available on various operating systems and is a default command interpreter on most GNU/Linux systems. The name is an acronym for the ‘Bourne-Again SHell’.

Table of Contents

Comments 

# Single line comment
: '
This is a
multi line
comment
'
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Variables 

#!/usr/bin/env bash

NAME="John"
echo "Hello $NAME!"
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Functions 

get_name() {
  echo "John"
}

echo "You are $(get_name)"
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Conditionals 

if [[ -z "$string" ]]; then
  echo "String is empty"
elif [[ -n "$string" ]]; then
  echo "String is not empty"
fi
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Loops 

for i in /etc/rc.*; do
  echo $i
done

for ((i = 0 ; i < 100 ; i++)); do
  echo $i
done

for i in {1..5}; do
    echo "Welcome $i"
done
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Execution

Make your bash script executable by running this command.

sudo chmod +x script.sh

./script.sh
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