我有一台运行 CentOS-6 和 Linux 2.6.32-696.18.7.el6.x86_64（是的，很旧）的主机，并且我的根文件系统上的磁盘空间不足。
文件系统的大小为 16G，du显示文件使用了大约 3G。当然，我运行了lsof +L1，找到了保存之前已取消链接的大日志文件的进程（是的，有几个这样的进程，所以我杀死了它们），但文件系统仍然已满，任何东西都可以写入它（不，inode 很好，没有可用的块）。
lsof +L1仍然显示一些文件，但这些文件占用的空间并不大，所以我很确定我可以忽略它：
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NLINK NODE NAME
init 1 root 9r REG 253,0 10406312 0 131692 /var/lib/sss/mc/initgroups (deleted)
pickup 2761 postfix 8r REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
dbus-daem 5232 dbus 4r REG 253,0 10406312 0 131692 /var/lib/sss/mc/initgroups (deleted)
hald 5271 haldaemon 19r REG 253,0 10406312 0 131692 /var/lib/sss/mc/initgroups (deleted)
ntpd 5528 ntp 4r REG 253,0 10406312 0 131730 /var/lib/sss/mc/initgroups (deleted)
qmgr 5631 postfix 8r REG 253,0 10406312 0 131730 /var/lib/sss/mc/initgroups (deleted)
crond 5655 root 8r REG 253,0 8406312 0 131792 /var/lib/sss/mc/passwd (deleted)
sssd 9042 root 16r REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
sssd_be 9045 root 18r REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
qemu-kvm 9606 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 16799 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 17419 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
polkitd 28420 root 8r REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
qemu-kvm 28802 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 30171 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 32110 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 32419 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 32563 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 34762 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 37823 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 39088 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
qemu-kvm 41613 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
nrpe 45821 nrpe 4r REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
sshd 52715 root 4w REG 253,0 10406312 0 134123 /var/lib/sss/mc/initgroups (deleted)
qemu-kvm 55329 root txt REG 253,0 4056888 0 397695 /usr/libexec/qemu-kvm (deleted)
我还应该尝试做什么（我很确定重新启动会有所帮助，但我想避免这样做）？
谢谢！