The disk space is not released after files are deleted.

After the file is deleted, the disk space will not be released and an alarm will be triggered. the disk space will soon be full. $ Df-h www.2cto.com file system capacity used available % mount point/dev/sda2 15G 937 M 13G 7%/dev/sda3 473G 105G 344G 24%/u02/ dev/sda8 8.6G 7.3G 819 M 91%/tmp/dev/sda7 9.5G 412 M 8.6G 5%/home/dev/sda6 15G 1.9G 12G 14%/usr/dev /sda5 15G 1015 M 13G 8%/var/dev/sda1 122 M 11 M 105 M 10%/boottmpfs 24G 92 K 24G 1%/dev/shm/dev/sdb1 1.4 T 864G 437G 67%/u01 went to the tmp directory, the 7.1G tmp_collect_msg_u02_io_peien_20111130.log file is large, so rm is dropped. However, df found that the disk space was not released. $ Rm tmp_collect_msg_u02_io_peien_20111130.log $ df-H file system capacity in use available % mount point/dev/sda2 15G 937 M 13G 7%/dev/sda3 473G 105G 344G 24%/ u02/dev/sda8 8.6G 7.3G 819 M 91%/tmp/dev/sda7 9.5G 412 M 8.6G 5%/home/dev/sda6 15G 1.9G 12G 14%/usr /dev/sda5 15G 1015 M 13G 8%/var/dev/sda1 122 M 11 M 105 M 10%/boottmpfs 24G 92 K 24G 1%/dev/shm/dev/ sdb1 1.4 T 864G 437G 67%/u01172.23.142.7: /nas/mysql_bak0535T 23 T 12 T 66 %/Bak3306 is not released because the file is opened. So ps aux | grep tmp found the following process: $ ps axu | grep tmpmysql 6007 0.0 0.0 8700 960? Ss 2011/bin/sh-c/home/mysql/collect_msg_u02_io_peien_20111123.sh>/tmp/batch 2> & 1 mysql 6008 0.0 0.0 8700 964? Ss 2011/bin/sh-c/home/mysql/collect_msg_u01_io_peien_20111123.sh>/tmp/secrets 2> & 1 mysql 6009 0.0 0.0 8704 756? S 2011/bin/sh-c/home/mysql/collect_msg_u02_io_peien_20111123.sh>/tmp/batch 2> & 1 mysql 6011 0.0 0.0 8704 764? S 2011/bin/sh-c/home/mysql/collect_msg_u01_io_peien_20111123.sh>/tmp/batch 2> & 1 mysql 31669 0.0 0.0 8700 956? Ss 2011/bin/sh-c/home/mysql/collect_msg_u02_io_peien_20111123.sh>/tmp/batch 2> & 1 mysql 31670 0.0 0.0 8704 756? S 2011/bin/sh-c/home/mysql/collect_msg_u02_io_peien_20111123.sh>/tmp/batch 2> & 1 mysql 31674 0.0 0.0 8700 960? Ss 2011/bin/sh-c/home/mysql/collect_msg_u01_io_peien_20111123.sh>/tmp/secrets 2> & 1 mysql 31678 0.0 0.0 8704 760? S 2011/bin/sh-c/home/mysql/collect_msg_u01_io_peien_20111123.sh>/tmp/timeout 2> & 1 11 years of processes, these people are really unreliable, test scripts, it should be cleared after completion. Kill these processes. Release disk space. $ Df-H file system capacity in use % available mount point/dev/sda2 15G 937 M 13G 7%/dev/sda3 473G 105G 344G 24%/u02/dev /sda8 8.6G 190 M 7.9G 3%/tmp/dev/sda7 9.5G 412 M 8.6G 5%/home/dev/sda6 15G 1.9G 12G 14%/usr/dev/ sda5 15G 1015 M 13G 8%/var/dev/sda1 122 M 11 M 105 M 10%/boottmpfs 24G 92 K 24G 1%/dev/shm/dev/sdb1 1.4 T 864G 437G 67%/u01172.23.142.7: /nas/mysql_bak0535T 24 T 12 T 66%/bak3306