Background: receive zabbix monitor, a machine disk alarm offline
Login server, view the directory at the root path size
Now occupied by the size of the discovery has been inconsistent use of space, thought might lead to a file handle is not released
View file handles still in use: lsof | grep -i deleted
The above is marked red to capture before executing the command issue analysis, suspicious.
Directly kill the process: kill 14867
Check disk space again:
Disk space has been released, the problem is solved.
The next check can be cleared by emptying the file descriptor file, so you can respond to a situation to deal with some of the services are running:
# Clear fd
> /proc/${pid}/fd/${id}
# Direct call or truncate command
truncate -s 0 /proc/${pid}/fd/${id}