lsof -n | grep deleted 解决/dev/vda1使用率100%问题

// 查看磁盘使用率为100%
root@kms-01:/# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            471M     0  471M   0% /dev
tmpfs            99M   13M   86M  13% /run
/dev/vda1        20G   20G     0 100% /
tmpfs           493M     0  493M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           493M     0  493M   0% /sys/fs/cgroup
tmpfs            99M     0   99M   0% /run/user/0

// 目录下文件磁盘使用并没有那么大
root@kms-01:/# du -sh *
12M	bin
107M	boot
4.0K	data
5.1M	etc
59M	export
4.0K	home
842M	lib
4.0K	lib64
16K	lost+found
12K	media
4.0K	mnt
4.0K	opt
1.3M	root
13M	run
8.5M	sbin
4.0K	srv
948M	swapfile
40M	tmp
1.8G	usr
540M	var

// 查看已删除空间却没有释放的进程
root@kms-01:/# lsof -n |grep deleted
tcpdump     894                  root    4w      REG              252,1 8207761408    1048639 /tmp/2000.cap (deleted)
tcpdump     992                  root    4w      REG              252,1 8207761408    1048639 /tmp/2000.cap (deleted)
tcpdump   31869                  root    4w      REG              252,1 8213934080    1050091 /tmp/1010.cap (deleted)

// 删除这些进程
root@kms-01:/# kill -9 894
root@kms-01:/# kill -9 992
root@kms-01:/# kill -9 31869

// 磁盘空间已经释放
root@kms-01:/# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            471M     0  471M   0% /dev
tmpfs            99M   13M   86M  13% /run
/dev/vda1        20G  4.3G   15G  24% /
tmpfs           493M     0  493M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           493M     0  493M   0% /sys/fs/cgroup
tmpfs            99M     0   99M   0% /run/user/0
root@kms-01:/#