输出内容含有大量的 overlay、/var/lib/kubelet、/run/containerd
# df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 1.5G 5.7M 1.5G 1% /run
/dev/vda1 40G 22G 16G 59% /
tmpfs 7.4G 0 7.4G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/vdb1 98G 8.5G 85G 10% /data
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/073402d85851c2d4f2d4747427c5867f2fd2f4861eceb96fe10310f69d74ed23/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/d55ebdf460ec9c5db7470443b3caf6c0669374d2bbb8f9f72c9a2d0f9b730adb/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/8b7fc8309db978b47febba1a0d0eb466d03a9d69bebde77fed54cb78076a8eb3/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/818b68e136081914cb1a5b73381ae05a2ef8dc2bc86d1e682d67ebcada4957a5/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/073402d85851c2d4f2d4747427c5867f2fd2f4861eceb96fe10310f69d74ed23/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/818b68e136081914cb1a5b73381ae05a2ef8dc2bc86d1e682d67ebcada4957a5/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/d55ebdf460ec9c5db7470443b3caf6c0669374d2bbb8f9f72c9a2d0f9b730adb/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/8b7fc8309db978b47febba1a0d0eb466d03a9d69bebde77fed54cb78076a8eb3/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/be2f828bddd88b11be2cec55ff03809b4b6174b71352cf8e26d6a872d5fae90e/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/595f81fc5c532459b66bd6dd4d7a38c7d7d145c5b3c739d1639cdfb65088cddb/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/4d1f2c0bdcada98a0e96ef4a4ea50fac3f46776716653abc2d806373179b73b5/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/719d810ed029241828ba2c9f930f18b82a5873dbf1ac6dfeea62d3ce408c2373/rootfs
tmpfs 15G 8.0K 15G 1% /var/lib/kubelet/pods/c22cb6c2-f42b-4810-a781-304489b942bd/volumes/kubernetes.io~secret/typha-certs
tmpfs 15G 8.0K 15G 1% /var/lib/kubelet/pods/f2e51469-7a2d-414c-9bd7-91905dfb4b5b/volumes/kubernetes.io~secret/calico-apiserver-certs
tmpfs 15G 8.0K 15G 1% /var/lib/kubelet/pods/0349be4b-29f8-46d5-b19d-b9de0c7d104b/volumes/kubernetes.io~secret/calico-apiserver-certs
tmpfs 15G 8.0K 15G 1% /var/lib/kubelet/pods/d94c1302-0e81-4859-ba22-162f0b92ff4e/volumes/kubernetes.io~secret/node-certs
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/d94c1302-0e81-4859-ba22-162f0b92ff4e/volumes/kubernetes.io~projected/kube-api-access-jxqwm
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/3b31d809-d9ab-4f7e-a219-4b0387ffee50/volumes/kubernetes.io~projected/kube-api-access-86sbg
tmpfs 170M 12K 170M 1% /var/lib/kubelet/pods/02edfda0-010a-4d45-b20f-70ade4f659e2/volumes/kubernetes.io~projected/kube-api-access-98mz2
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/0349be4b-29f8-46d5-b19d-b9de0c7d104b/volumes/kubernetes.io~projected/kube-api-access-rr2ql
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/a3b0cb40-0610-49d9-ac37-5ad747490d89/volumes/kubernetes.io~projected/kube-api-access-k52z2
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/ea56f8b8-15ef-4693-84c7-26a7581a3397/volumes/kubernetes.io~projected/kube-api-access-cgzd8
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/f2e51469-7a2d-414c-9bd7-91905dfb4b5b/volumes/kubernetes.io~projected/kube-api-access-gj7sh
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/c22cb6c2-f42b-4810-a781-304489b942bd/volumes/kubernetes.io~projected/kube-api-access-kq24g
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/ab8ffdcc-9b6e-4511-accb-43acb4dc1617/volumes/kubernetes.io~projected/kube-api-access-rmwv2
tmpfs 1.0G 12K 1.0G 1% /var/lib/kubelet/pods/0bda88af-8ad1-4912-9e1f-2e0d4a8a0dca/volumes/kubernetes.io~projected/kube-api-access-xjztw
tmpfs 170M 12K 170M 1% /var/lib/kubelet/pods/06403239-0be7-4942-9ecb-b313c7323bcb/volumes/kubernetes.io~projected/kube-api-access-kvq7n
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/13d4d5be-6bc5-4477-b96f-f041002b353c/volumes/kubernetes.io~projected/kube-api-access-tqt4r
tmpfs 1.0G 12K 1.0G 1% /var/lib/kubelet/pods/8f1765f1-1669-43da-b83e-923d2876583b/volumes/kubernetes.io~projected/kube-api-access-6qm2p
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/cad4d87a-8899-4674-b2b8-8016047d6c45/volumes/kubernetes.io~projected/kube-api-access-4kbpl
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/5088d0cc-112b-4936-a87f-6dfb8d9b2c4d/volumes/kubernetes.io~projected/kube-api-access-z9p6n
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/d4f7f61e1296a5a290774513f759871bf421c62b189ea4a1af9c9d343bf54f87/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/d4f7f61e1296a5a290774513f759871bf421c62b189ea4a1af9c9d343bf54f87/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/3fafa2e0e47ce3d0965f600727f8032b113c7cde091c25d9d07ebf67da788716/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/3fafa2e0e47ce3d0965f600727f8032b113c7cde091c25d9d07ebf67da788716/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/dc3bbb5418ac03a5e8a897a66a9d4dcf5e8c4c87136908a07dc76e4b4a3aaccc/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/dc3bbb5418ac03a5e8a897a66a9d4dcf5e8c4c87136908a07dc76e4b4a3aaccc/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/55f179cf7725bf69e788e19d167153a8dbea0d1e48e6769e917367b0055be819/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/55f179cf7725bf69e788e19d167153a8dbea0d1e48e6769e917367b0055be819/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/26fb785cb90d819f9377d70ef83a26e51cbc045d1c96facd597984fac200c0e7/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/43a70cf8a4a10c8b0c447b96dfed568885625df9e115a5a8ae479209639f70e2/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/e580918a1e367e4ce170c796c02d6ad4675b80df3d11096e9b4f16cf185762b4/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/e580918a1e367e4ce170c796c02d6ad4675b80df3d11096e9b4f16cf185762b4/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/5221433ed04bcae94b3f0449f98197429d494662135ba9b50f75dbc2a966fcff/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/86314275c2878d9d5ef9202a888742c53ee3465e3ab95a669c66fa46d85e65b3/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/7cab9d41cb622b2e07545e9ab86830af14c42fb8b21ce0e35425299ad6e25edd/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/86314275c2878d9d5ef9202a888742c53ee3465e3ab95a669c66fa46d85e65b3/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/7cab9d41cb622b2e07545e9ab86830af14c42fb8b21ce0e35425299ad6e25edd/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/bc5c1c527631981820520348b5e358bf2d7ed5e994a15b0701d6b883f8a9b053/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/3575b19e0a613246637d28ee1348e1f432d043a3b73e0a2eb44a36cd61ab44cc/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/1b7683b0d51821a2cd8ac23d1b04c51c79bb3e69f711b6c7b8a63ebbc3ab4cc0/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/89c6eaf5463b1e40346deb1da1c4d749184053adf23978e1091484605e6aba2d/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/1b7683b0d51821a2cd8ac23d1b04c51c79bb3e69f711b6c7b8a63ebbc3ab4cc0/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/89c6eaf5463b1e40346deb1da1c4d749184053adf23978e1091484605e6aba2d/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/f25205de183f44712e6e90677f1bbcd2863212ab821ddd81ee387f0cea30a59e/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/82798bdd55ec1d389d04338f90d5e1e4f996f3d5045b928ec64bbc6f955fa7dd/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/77efc67965dd35a62ef40fd9563ed6b05fb3716a627478545a5aaa429a9e45bc/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/77efc67965dd35a62ef40fd9563ed6b05fb3716a627478545a5aaa429a9e45bc/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/6e6fafc98ee744f6e1c6dbee5f0457df96751bcef875522a0b5306cff26e633d/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/6e6fafc98ee744f6e1c6dbee5f0457df96751bcef875522a0b5306cff26e633d/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/fe9c077b37ce2e258414cc1f819321d1a80a373b0a0efdfd6d2aa330d50a89ea/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/647565aeab88a2217dc24e9cb02f7e5516540b3244ceb7136ac848d63ff690a3/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/913dc8e7569be57b0cc2ace69a623de867741aea5f60395125464496fb1e9118/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/647565aeab88a2217dc24e9cb02f7e5516540b3244ceb7136ac848d63ff690a3/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/913dc8e7569be57b0cc2ace69a623de867741aea5f60395125464496fb1e9118/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/1887ce22b141af22deeb123604a9bb1c0d28e4fdc9ef68be1ee5a970ff4e5463/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/6de011518309256febef532c27907f7b5984f9fe179bcc1b7dfd32caeecf02e6/rootfs
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/09b094ba8cb34d84ec6da7583b1904b98f5182af0aa81477067eb1e58bff2ba6/shm
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/a4c9ac32b3b4e743dcc5e20e9f8802a2cd83339d78535db4fe684e350de399b6/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/09b094ba8cb34d84ec6da7583b1904b98f5182af0aa81477067eb1e58bff2ba6/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/a4c9ac32b3b4e743dcc5e20e9f8802a2cd83339d78535db4fe684e350de399b6/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/1545dfac39344f698c9840ed736a5a45490f8efeed29a755971ed6730f3ba27c/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/f5d0fff057a810182dc522a943528afd361fae376d8e1cd64679cf4bf30459f6/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/dc193f1ce06bd34c51a07dff1443ea165849923844fdff874401f81c9ca96756/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/2f800c5e9a91bd9d639b94443b59a47b8751523693c9302eb5072b5a2e4c79b5/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/418ab8ee4365ba510e0177e03ea1b894f3b5016b6f46bd9b4e3cda239a4b718e/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/ce329b935549377fe7b709478210d1afb5a3a062f52f71ca53f6707cd8f10281/rootfs
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/49d733d1cf955ba59277912c921634f81a20417bc25cb4b784788911621c3560/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/7533e7698f0772a9670b0ed0f70325e8c4d333d0d2b5631cf6e09b91a3fde994/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/3e835aff7da0c1d1d0aefb64932aae2873735648fc67848eb477efe4cd39424b/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/db84d30ee63c7d133a0dc0768265fc09664cafff6cf09e04a8ec97539c210832/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/58db89d367dfe6605916a8cd9120f626992c5e3f2c1518b461f9ec4e7cf744fe/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/8e433aada8c5d5e711aec81c62c70a73b9173a049085bbc7155afef5ea3849d0/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/999f643e39b86329030470c1843ac96324ceeadd10d6d91f370fc40fb10171a5/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/8e8dec227b284da23ce287a1b984d113edf5c5f5eb81e86d40b8858eed9acb82/merged
overlay 40G 22G 16G 59% /var/lib/docker/overlay2/f5d14ed47befa5d9213a82aa87ae2762ef56d58daf67b849baa639a01e4e3f19/merged
tmpfs 1.0G 12K 1.0G 1% /var/lib/kubelet/pods/af2d3b42-759e-456a-86de-174dbf2739a8/volumes/kubernetes.io~projected/kube-api-access-g96vr
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/4a539bb29c676e1f468e3b21f2c32a943beb4c11504ee48ae15e9c58dc97042c/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/4a539bb29c676e1f468e3b21f2c32a943beb4c11504ee48ae15e9c58dc97042c/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/13b66d041fdadd869ca4fec06a428288904db12ccadfa7ecfd713475f53b8e8c/rootfs
tmpfs 1.0G 12K 1.0G 1% /var/lib/kubelet/pods/832c1f4f-2b84-480a-8238-f119ef4d55e5/volumes/kubernetes.io~projected/kube-api-access-nblmq
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/b507f8b1ebd681ca0640c2a06f6a7d01ffe09551bf6e0ffde810496efca84ff7/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/b507f8b1ebd681ca0640c2a06f6a7d01ffe09551bf6e0ffde810496efca84ff7/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/674fdd0c3f6df1c1fc191855ca7c18743f36ff856eb298ede1ca72a431284ed0/rootfs
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/4693945f-4f48-4369-bd65-298fce62a842/volumes/kubernetes.io~projected/kube-api-access-m4kh5
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/62fa01c3b0f74fc0f1bbfa8da6beca49d46187fa21de3af3652dccdaa8119be0/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/62fa01c3b0f74fc0f1bbfa8da6beca49d46187fa21de3af3652dccdaa8119be0/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/1c8d3a2fd428e77ce1f2763052c5511dd7e68cd166e787c20e9a7d5dd0368f17/rootfs
tmpfs 15G 12K 15G 1% /var/lib/kubelet/pods/eb2e4814-dd62-4098-b622-9ad51104d628/volumes/kubernetes.io~projected/kube-api-access-65c5m
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/6f23d06267bc376fb2c1737dd7f85b103f7434b66eb8388c5cfafa7df6c9c10e/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/6f23d06267bc376fb2c1737dd7f85b103f7434b66eb8388c5cfafa7df6c9c10e/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/4e18d1a4d3cdaa4c240fd5e17dd785270be1a39f3c1d4bfbbe54eea41713a869/rootfs
tmpfs 1.0G 12K 1.0G 1% /var/lib/kubelet/pods/576168d0-1072-4871-8219-3c7a0e8963ee/volumes/kubernetes.io~projected/kube-api-access-575vz
shm 64M 0 64M 0% /run/containerd/io.containerd.grpc.v1.cri/sandboxes/0fd63fa635e11a987340a36262e41f886d68c9d71894f3decca681a007f2914a/shm
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/0fd63fa635e11a987340a36262e41f886d68c9d71894f3decca681a007f2914a/rootfs
overlay 40G 22G 16G 59% /run/containerd/io.containerd.runtime.v2.task/k8s.io/33661beb1d1930e73bf6e83283cdfb090abe71a7097b0d01316a77a5672e5ba0/rootfs
tmpfs 1.5G 12K 1.5G 1% /run/user/0
这台服务器上正在运行 Kubernetes (K8s) 或者 Docker/Containerd 容器服务。
为什么会这样？
df -h 会列出所有“挂载点”。在容器环境下，每一个运行的容器（Pod）都需要自己独立的、隔离的文件系统环境，所以系统挂载了大量虚拟出来的存储层。
具体来看这些乱七八糟的项是什么：
overlay:
这是容器最核心的文件系统（OverlayFS）。简单来说，每一个容器启动时，都会把“只读的镜像层”和“可写的容器层”堆叠在一起。你看到有多少个overlay，就说明这台机器上大概跑了多少个容器实例。/run/containerd/.../shm:
这是给容器分配的共享内存（Shared Memory），每个容器一小块，类似系统的/dev/shm。/var/lib/kubelet/.../tmpfs:
这是 Kubernetes 用来把 Secret（密钥）、ConfigMap（配置）或者 Token 挂载进 Pod 里的。它们存在内存里（tmpfs），不写入磁盘，为了安全和速度。
如何只看“真正的磁盘”？
只关心物理磁盘还剩多少空间。可以用以下几种方法过滤掉这些干扰项：
方法 1：只看物理硬盘
使用 grep 筛选以 /dev 开头的行，这是最简单直接的方法：
df -h | grep ^/dev
输出过滤后会变成这样：
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 40G 22G 16G 59% /
/dev/vdb1 98G 8.5G 85G 10% /data
一目了然了：系统盘用了 59%，数据盘只用了 10%。
方法 2：排除掉容器相关的类型
使用 df 自带的排除参数 -x (exclude)，排除掉 overlay 和 tmpfs：
df -h -x overlay -x tmpfs
方法 3：使用 lsblk 命令
如果你只是想看磁盘分区结构和大小，lsblk 往往比 df 更直观：
lsblk
总结
服务器磁盘状态是健康的，那些看着混乱的条目只是容器运行时的虚拟挂载点，不需要担心，也不要去手动清理它们（否则容器会崩溃）。
