????2??????y???????????????????????
????kill?????????????????y??????os????????????
??????linux?????????????Linux???????????????/proc/ ??/proc/nnnn/fd/????nnnn?pid???????????????pid???????????????????????????????????fd???????y???????????????fd??fd??file descriptor??
????kill????????????proc??????е????????????????????????????????????
root@instance-zo0fkfng:~# service php5-fpm restart
root@instance-zo0fkfng:~# lsof|grep deleted
init          1             root   10w      REG              253??1        283     155958 /var/log/upstart/network-manager.log.1 (deleted)
init          1             root   12w      REG              253??1        314     155934 /var/log/upstart/mountall.log.1 (deleted)
init          1             root   13w      REG              253??1        508     131203 /var/log/upstart/modemmanager.log.1 (deleted)
init          1             root   17w      REG              253??1        881     155967 /var/log/upstart/mysql.log.1 (deleted)
init          1             root   24w      REG              253??1         63     155949 /var/log/upstart/dbus.log.1 (deleted)
mysqld     1159            mysql    4u      REG              253??1          0        374 /tmp/ibkjeh3Z (deleted)
mysqld     1159            mysql    5u      REG              253??1          0       3458 /tmp/ibdbHetZ (deleted)
mysqld     1159            mysql    6u      REG              253??1          0      29466 /tmp/ibQSxcTY (deleted)
mysqld     1159            mysql    7u      REG              253??1          0        282 /tmp/ibxSgZNX (deleted)
mysqld     1159            mysql   11u      REG              253??1          0      29469 /tmp/ibXTzqnX (deleted)
mysqld     1159  1185      mysql    4u      REG              253??1          0        374 /tmp/ibkjeh3Z (deleted)
mysqld     1159  1185      mysql    5u      REG              253??1          0       3458 /tmp/ibdbHetZ (deleted)
mysqld     1159  1185      mysql    6u      REG              253??1          0      29466 /tmp/ibQSxcTY (deleted)
mysqld     1159  1185      mysql    7u      REG              253??1          0        282 /tmp/ibxSgZNX (deleted)
mysqld     1159  1185      mysql   11u      REG              253??1          0      29469 /tmp/ibXTzqnX (deleted)
mysqld     1159  1186      mysql    4u      REG              253??1          0        374 /tmp/ibkjeh3Z (deleted)
mysqld     1159  1186      mysql    5u      REG              253??1          0       3458 /tmp/ibdbHetZ (deleted)
mysqld     1159 18149      mysql    4u      REG              253??1          0        374 /tmp/ibkjeh3Z (deleted)
mysqld     1159 18149      mysql    5u      REG              253??1          0       3458 /tmp/ibdbHetZ (deleted)
mysqld     1159 18149      mysql    6u      REG              253??1          0      29466 /tmp/ibQSxcTY (deleted)
mysqld     1159 18149      mysql    7u      REG              253??1          0        282 /tmp/ibxSgZNX (deleted)
mysqld     1159 18149      mysql   11u      REG              253??1          0      29469 /tmp/ibXTzqnX (deleted)
mysqld     1159 18150      mysql    4u      REG              253??1          0        374 /tmp/ibkjeh3Z (deleted)
mysqld     1159 18150      mysql    5u      REG              253??1          0       3458 /tmp/ibdbHetZ (deleted)
mysqld     1159 18150      mysql    6u      REG              253??1          0      29466 /tmp/ibQSxcTY (deleted)
mysqld     1159 18150      mysql    7u      REG              253??1          0        282 /tmp/ibxSgZNX (deleted)
mysqld     1159 18150      mysql   11u      REG              253??1          0      29469 /tmp/ibXTzqnX (deleted)
php5-fpm  18132             root    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18135         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18136         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18137         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18138         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18139         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18140         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18141         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18142         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18143         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18144         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
php5-fpm  18147         www-data    3u      REG              253??1          0      28407 /tmp/.ZendSem.hIpOFr (deleted)
???????????php5-fpm??????
?????????????????????
????: > /path/to/the/file.log
????: > "/proc/$pid/fd/$fd"