echo"hello there"
echo hello there
echo "*.txt"
NAME = Jessica
NAME= Jessica
NAME=Jessica
echo "Hello there, $NAME"
echo "Hello there, $NAMEs"
echo "Hello there, ${NAME}s"
$NAME
echo $NAM
echo $NAME
FILE=`ls -1 *.txt | sort | tail -1`
echo $FILE
FILE="ls -1 *.txt | sort | tail -1"
x=5
y=6
z="$x + $y"
echo $z
let z="$x + $y"
echo $z
y="Jessica"
let z="$x + $y"
echo $z
echo hello$z
echo $zhello
echo \$
echo $PS1
echo $SHELL
echo $PATH
planets.sh
echo $PATH
PATH="${PATH}:/."
echo $PATH
PATH="${PATH}:./"
unset PATH
echo $PATH
grep "jessica" planets.sh