welcome.sh
chmod u+x welcome.sh
./welcome.sh
vi welcome.sh
./welcome.sh
AGE=14
NAME=Josh
echo $AGE
echo "My name is $NAME"
x=5
y=6
z="$x + $y"
echo $z
let z="$x + $y"
echo $z
which let
man let
FILE="myfile.txt"
echo $FILE
echo "$FILEmodified"
echo "${FILE}modified"
x=3
x
$x
3
echo $x
echo "$x"
echo `$x`
`x`
echo $PS1
PS1=`whoami`@`hostname`:$
ls
./welcome.sh
welcome.sh
cd cse390a
welcome.sh
cd..
ls
cd ..
ls
echo $PATH
PATH=$PATH:~
echo $PATH
welcome.sh
cd cse390a
welcome.sh
PATH=""
ls
ls
x=3
export x
exit
bash
echo $x