Shell Programming and Scripting

while read s1 ; do
url=http://ichart.finance.yahoo.com/table.csv?s=
s="&a=3&b=14&c=2012&d=03&e=20&f=2012&g=d&ignore.csv"
  wget -a wget.log $url$s1$s ;
  sleep 5;
  cat header.txt > $s1.txt;
  chmod 777 $s1.txt;
  sed '1d' table.csv?s\=$s1 >> $s1.txt;
rm -Rf table*
done < nasdaqsymbollist

while read s1
do
    url=http://ichart.finance.yahoo.com/table.csv?s=
    s="&a=3&b=14&c=2012&d=03&e=20&f=2012&g=d&ignore.csv"
    (cat header.txt; wget -O - --quiet $url$s1$s | sed 1d) > $s1.txt
    sleep 5
done < nasdaqsymbollist

while read sl
do 
  ....
  cat header.txt
  wget   ...    "$url$s1$s" | ...
done < nasdaqsymbollist > "$s1.txt"

$ cat in
x
y
z

$ while read s1
do
  cat /etc/hosts
  uname -a
done < in > "$s1.txt"

$ ls -lart
total 16
-rw-r--r--  1 user user    6 2012-05-02 08:15 in
drwxrwxrwt 14 root root 4096 2012-05-02 08:17 ..
drwxr-xr-x  2 user user 4096 2012-05-02 08:19 .
-rw-r--r--  1 user user  960 2012-05-02 08:19 .txt