My script doesnt run ( Linux).. can someone help my please?

#!/bin/bash

# sysinfo_page - A script to produce a system information HTML file

##### Constants

TITLE="System Information for $HOSTNAME"

RIGHT_NOW=$(date +"%x %r %Z")

TIME_STAMP="Updated on $RIGHT_NOW by $USER"

##### Functions

system_info()

{

echo "

System release info

"

echo "

Function not yet implemented

"

} # end of system_info

show_uptime()

{

echo "

System uptime

"

echo "

"

uptime

echo ""

} # end of show_uptime

drive_space()

{

echo "

Filesystem space

"

echo "

"

df

echo ""

} # end of drive_space

home_space()

{

# Only the superuser can get this information

if [ "$(id -u)" = "0" ]; then

echo "

Home directory space by user

"

echo "

"

echo "Bytes Directory"

du -s /home/* | sort -nr

echo ""

fi

} # end of home_space

write_page()

{

# sysinfo_page - A script to produce a system information HTML file

##### Constants

TITLE="System Information for $HOSTNAME"

RIGHT_NOW=$(date +"%x %r %Z")

TIME_STAMP="Updated on $RIGHT_NOW by $USER"

##### Functions

system_info()

{

echo "

System release info

"

echo "

Function not yet implemented

"

} # end of system_info

show_uptime()

{

echo "

System uptime

"

echo "

"

uptime

echo ""

} # end of show_uptime

drive_space()

{

echo "

Filesystem space

"

echo "

"

df

echo ""

} # end of drive_space

home_space()

{

# Only the superuser can get this information

if [ "$(id -u)" = "0" ]; then

echo "

Home directory space by user

"

echo "

"

echo "Bytes Directory"

du -s /home/* | sort -nr

echo ""

fi

} # end of home_space

write_page()

{

cat <<-_EOF_

$TITLE

$TIME_STAMP

$(system_info)

$(show_uptime)

$(drive_space)

$(home_space)

_EOF_

}

usage()

{

echo "usage: sysinfo_page [[[-f file ] [-i]] | [-h]]"

}

##### Main

interactive=1

filename=~/sysinfo_page.html

while [ "$1" != "" ]; do

case $1 in

-f | --file )

shift

filename=$1

;;

-i | --interactive )

interactive=1

;;

-h | --help ) usage

exit

;;

* )

usage

exit 1

;;

esac

shift

done

# Test code to verify command line processing

if [ "$interactive" = "1" ]; then

response=

echo -n "Enter name of output file [$filename] > "

read -r response

if [ -n "$response" ]; then

filename=$response

fi

if [ -f "$filename" ]; then

echo -n "Output file exists. Overwrite? (y/n) > "

read -r response

if [ "$response" != "y" ]; then

echo "Exiting program."

exit 1

fi

fi

fi

if [ "$interactive" = "1" ]; then

echo "interactive is on"

else

echo "interactive is off"

fi

echo "output file = $filename"

# Write page (comment out until testing is complete)

write_page > $filename

if [ "$interactive" = "1" ]; then

response=

echo -n "Enter name of output file [$filename] > "

read response

if [ -n "$response" ]; then

filename=$response

fi

if [ -f $filename ]; then

echo -n "Output file exists. Overwrite? (y/n) > "

read response

if [ "$response" != "y" ]; then

echo "Exiting program."

exit 1

fi

fi

fi

mail -s "name.html" name@email -s "cjm.html" c-name@email

*** I will update my name and email***