linux快速删除大量文件方法

格式：
 rsync --delete-before -a -H -v --progress --stats 
选项：
--delete-before    接收者在传输之前进行删除操作
-progress     在传输时显示传输过程
-a       归档模式 表示以递归方式传输文件，并保持所有文件属性
-r        对子目录以递归方式处理
-H      保持硬连接的文件
-v       详细输出模式

举例说明：
/root/345/ 是一个空文件夹，/root/k8s_images目录下有很多文件，现在要将这个目录下的N多个文件清空

[root@bogon ~]# du -sh *
0 345
1.2G k8s_images

然后执行命令

[root@bogon ~]# rsync --delete-before -a -H -v --progress --stats /root/345/ /root/k8s_images
building file list ... 
1 file to consider
deleting docker_images/pause-amd64_3.0.tar
deleting docker_images/kubernetes-dashboard_v1.8.1.tar
deleting docker_images/kube-scheduler-amd64_v1.9.0.tar
deleting docker_images/kube-proxy-amd64_v1.9.0.tar
deleting docker_images/kube-controller-manager-amd64_v1.9.0.tar
deleting docker_images/kube-apiserver-amd64_v1.9.0.tar
deleting docker_images/k8s-dns-sidecar-amd64_1.14.7.tar
deleting docker_images/k8s-dns-kube-dns-amd64_1.14.7.tar
deleting docker_images/k8s-dns-dnsmasq-nanny-amd64_v1.14.7.tar
deleting docker_images/flannel_v0.9.1-amd64.tar
deleting docker_images/etcd-amd64_v3.1.10.tar
deleting docker_images/
deleting yum-utils-1.1.31-42.el7.noarch.rpm
deleting socat-1.7.3.2-2.el7.x86_64.rpm
deleting python-kitchen-1.1.1-5.el7.noarch.rpm
deleting lvm2-libs-2.02.171-8.el7.x86_64.rpm
deleting lvm2-2.02.171-8.el7.x86_64.rpm
deleting lsof-4.87-4.el7.x86_64.rpm
deleting libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
deleting libtool-ltdl-2.4.2-22.el7_3.x86_64.rpm
deleting libseccomp-2.3.1-3.el7.x86_64.rpm
deleting kubernetes-dashboard_v1.8.1.tar
deleting kubernetes-dashboard.yaml
deleting kubernetes-cni-0.6.0-0.x86_64.rpm
deleting kubelet-1.9.9-9.x86_64.rpm
deleting kubectl-1.9.0-0.x86_64.rpm
deleting kubeadm-1.9.0-0.x86_64.rpm
deleting kube-flannel.yml
deleting docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm
deleting docker-ce-17.03.2.ce-1.el7.centos.x86_64.rpm
deleting device-mapper-persistent-data-0.7.0-0.1.rc6.el7.x86_64.rpm
deleting device-mapper-libs-1.02.140-8.el7.x86_64.rpm
deleting device-mapper-event-libs-1.02.140-8.el7.x86_64.rpm
deleting device-mapper-event-1.02.140-8.el7.x86_64.rpm
deleting device-mapper-1.02.140-8.el7.x86_64.rpm
deleting container-selinux-2.33-1.git86f33cd.el7.noarch.rpm
./

Number of files: 1
Number of files transferred: 0
Total file size: 0 bytes
Total transferred file size: 0 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 19
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 29
Total bytes received: 15

sent 29 bytes received 15 bytes 88.00 bytes/sec
total size is 0 speedup is 0.00

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这个命令必须是目录对目录，文件对文件，如果岔了就报错：

[root@bogon ~]# rsync --delete-before -a -H -v --progress --stats /root/345/ /root/k8s_images.tgz 
building file list ... 
1 file to consider
ERROR: cannot overwrite non-directory with a directory
rsync error: errors selecting input/output files, dirs (code 3) at main.c(559) [Receiver=3.0.9]
rsync: connection unexpectedly closed (9 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(605) [sender=3.0.9]
[root@bogon ~]#

--------------------------------------------------------------------------------------------------------------

现在我们再演示一下删除大文件，如下

[root@bogon ~]# touch 123
[root@bogon ~]# du -sh *
0 123
354M k8s_images.tgz

然后执行删除命令，如下：

[root@bogon ~]# rsync --delete-before -a -H -v --progress --stats /root/123 /root/k8s_images.tgz 
building file list ... 
1 file to consider
123
 0 100% 0.00kB/s 0:00:00 (xfer#1, to-check=0/1)

Number of files: 1
Number of files transferred: 1
Total file size: 0 bytes
Total transferred file size: 0 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 21
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 67
Total bytes received: 31

sent 67 bytes received 31 bytes 196.00 bytes/sec
total size is 0 speedup is 0.00

查看一下k8s_images.tgz大小

[root@bogon ~]# du -sh *
0 123
0 k8s_images.tgz

--------------------------------------------------------------------------------------------------------------
好了，这样就搞定了

或者用

rsync --delete -rlptD /root/345/ /root/k8s_images

也可以删除，可以自由选择哈