vda1use 100%

查看文件的占用

1 [root@VM-16-16-centos ~]# df -h
2 Filesystem      Size  Used Avail Use% Mounted on
3 devtmpfs        1.8G     0  1.8G   0% /dev
4 tmpfs           1.8G   24K  1.8G   1% /dev/shm
5 tmpfs           1.8G  266M  1.6G  15% /run
6 tmpfs           1.8G     0  1.8G   0% /sys/fs/cgroup
7 /dev/vda1        50G  50G   0G  100% /
8 tmpfs           368M     0  368M   0% /run/user/0

查看各目录下文件占用：

[root@VM-xx-xx-centos /]# du -h --max-depth=1 /
292K /tmp
8.0K /CVIS
64K /home
169M /opt
du: cannot access ‘/proc/18870’: No such file or directory0 /proc
131M /boot
274M /run
50G /root

继续查看是哪个目录比较大，重复步骤2，找到大目录或者文件使用rm -rf 删除

重点其实删除完之后系统并没有真正的释放内存,使用lsof 查看已删除空间却没有释放的进程，找到对应的进程号 kill掉即可

 1 [root@VM-16-16-centos /]# lsof -n / |grep deleted
 2 systemd-j     538   root  txt    REG  253,1   153896 273324 /usr/lib/systemd/systemd-journald (deleted)
 3 dbus-daem     619   dbus  txt    REG  253,1   245680 262631 /usr/bin/dbus-daemon (deleted)
 4 dbus-daem     619   dbus    8r   REG  253,1  6940392 133804 /var/lib/sss/mc/group (deleted)
 5 dbus-daem     619   dbus   16r   REG  253,1  9253600 133788 /var/lib/sss/mc/passwd (deleted)
 6 dbus-daem     619   dbus   19r   REG  253,1 11567160 133811 /var/lib/sss/mc/initgroups (deleted)
 7 systemd-l     809   root  txt    REG  253,1   250928 273326 /usr/lib/systemd/systemd-logind (deleted)
 8 NetworkMa     944   root  txt    REG  253,1  3430952 278321 /usr/sbin/NetworkManager (deleted)
 9 NetworkMa     944   root   13r   REG  253,1  9253600 133736 /var/lib/sss/mc/passwd (deleted)
10 atd          1272   root    3r   REG  253,1  9253600 133736 /var/lib/sss/mc/passwd (deleted)
11 atd          1272   root    5r   REG  253,1  6940392 133738 /var/lib/sss/mc/group (deleted)
12 agetty       1691   root  txt    REG  253,1    64016 278328 /usr/sbin/agetty (deleted)
13 agetty       1691   root    3r   REG  253,1  6940392 133804 /var/lib/sss/mc/group (deleted)
14 agetty       1692   root  txt    REG  253,1    64016 278328 /usr/sbin/agetty (deleted)
15 agetty       1692   root    3r   REG  253,1  6940392 133804 /var/lib/sss/mc/group (deleted)