BASH

BASH Script

Hello World

#!/bin/bash
STR="Hello World"
echo $STR

Variables

Local Variables

#!/bin/bash
HELLO=Hello 
function hello {
        local HELLO=World
        echo $HELLO
}
echo $HELLO
hello
echo $HELLO

Loops

While

#!/bin/bash
COUNTER=0
while [ $COUNTER -lt 10 ]; do
    echo The counter is $COUNTER
    let COUNTER=COUNTER+1
done

For

#!/bin/bash
for i in $( ls ); do
    echo item: $i
done

Conditional

if

#!/bin/bash
T1="foo"
T2="bar"
if [ "$T1" = "$T2" ]; then
    echo expresion evaluated as true
else
    echo expresion evaluated as false
fi

case

#!/bin/bash
case $yn in
    [YySs]* ) adduser $user; break;;
    [Nn]* ) echo no se creo usuario $user; break;;
    * ) echo "Elije y/n";;
esac