[wln@localhost python]$ cat 01.py
#!/usr/bin/env python
import os ,sys

"""A basic fork in action"""

import os
print '01'*5
child = os.fork()
if child == 0:
    cmd = 'sudo top -b > a.top'
    os.system(cmd)
    print '001'*5
else:
    print '110'*5

#!/usr/bin/sh

p=`ps -ef | grep 01.py | awk '{print$2}'`
for i in $p
do
    sudo kill -9 $i
done

q=`ps -ef |  grep top | awk '{print$2}'`

for i in $q
do
    sudo  kill -9 $i
done