如何在Linux中让一个正在运行的任务转为后台执行？

[root@dispatch_19 gcc-4.8.1]# cd /home/machen/vv_cold_algorithm/movie_score_builder && /usr/local/bin/python view_record_manage.py save 1
13-12-28 13:50:49 ./logs/view_record.log INFO   start calculate delta data
13-12-28 13:50:49 ./logs/view_record.log INFO   hdfs:/data/dm/recommend/recom_yvv/20131227
first fresh...


ctrl+z
[1]+  Stopped                 /usr/local/bin/python view_record_manage.py save 1
[root@dispatch_19 movie_score_builder]#bg
[1]+ /usr/local/bin/python view_record_manage.py save 1 &
[root@dispatch_19 movie_score_builder]#jobs
[1]+  Running                 /usr/local/bin/python view_record_manage.py save 1 &
[root@dispatch_19 movie_score_builder]# disown  -h %1