UNIX for Dummies Questions & Answers

 vi 007
#!/bin/bash
FILE=$1

if [ -f $FILE ];then

  echo " hello "  # say hello to the user
  echo " $HOME "
  echo " $HOSTNAME "
  echo " $(uname) "
  echo " today is $(date) "
  echo " $(whoami) is currently logged in "

else
  touch file.007

fi

~
~
~
~
~
"007" [New file] 16 lines, 247 characters 
an12:/home/vbe $ chmod 750 007
an12:/home/vbe $ ./007 >file.007
an12:/home/vbe $ ./007 file.007 >file.007
an12:/home/vbe $ rm file.007
an12:/home/vbe $ ./007 file.007 >file.007
an12:/home/vbe $ more file.007
 hello 
 /home/vbe 
 an12 
 AIX 
 today is Fri Nov 18 17:08:06 NFT 2011 
 vbe is currently logged in 
file.007: END

an12:/home/vbe $ ./007 >file.007
an12:/home/vbe $ ./007 file.007 >file.007

#!/bin/sh
{
echo " hello "
echo " $HOME "
echo " $HOSTNAME "
echo " $(uname) "
echo " today is $(date) "
echo " $(whoami) is currently logged in "
} > "$1"

exit 0