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              Linux 磁盤管理之df【每日一個知識點第148期-Linux】

              df

              df命令參數功能:檢查文件系統的磁盤空間占用情況。可以利用該命令來獲取硬盤被占用了多少空間,目前還剩下多少空間等信息。

              語法:

              df [-ahikHTm] [目錄或文件名]

              選項與參數:

              • -a :列出所有的文件系統,包括系統特有的 /proc 等文件系統;
              • -k :以 KBytes 的容量顯示各文件系統;
              • -m :以 MBytes 的容量顯示各文件系統;
              • -h :以人們較易閱讀的 GBytes, MBytes, KBytes 等格式自行顯示;
              • -H :以 M=1000K 取代 M=1024K 的進位方式;
              • -T :顯示文件系統類型, 連同該 partition 的 filesystem 名稱 (例如 ext3) 也列出;
              • -i :不用硬盤容量,而以 inode 的數量來顯示

              實例 1

              將系統內所有的文件系統列出來!

              [root@www ~]# df
              Filesystem      1K-blocks      Used Available Use% Mounted on
              /dev/hdc2         9920624   3823112   5585444  41% /
              /dev/hdc3         4956316    141376   4559108   4% /home
              /dev/hdc1          101086     11126     84741  12% /boot
              tmpfs              371332         0    371332   0% /dev/shm

              在 Linux 底下如果 df 沒有加任何選項,那么默認會將系統內所有的 (不含特殊內存內的文件系統與 swap) 都以 1 Kbytes 的容量來列出來!

              實例 2

              將容量結果以易讀的容量格式顯示出來

              [root@www ~]# df -h
              Filesystem            Size  Used Avail Use% Mounted on
              /dev/hdc2             9.5G  3.7G  5.4G  41% /
              /dev/hdc3             4.8G  139M  4.4G   4% /home
              /dev/hdc1              99M   11M   83M  12% /boot
              tmpfs                 363M     0  363M   0% /dev/shm

              實例 3

              將系統內的所有特殊文件格式及名稱都列出來

              [root@www ~]# df -aT
              Filesystem    Type 1K-blocks    Used Available Use% Mounted on
              /dev/hdc2     ext3   9920624 3823112   5585444  41% /
              proc          proc         0       0         0   -  /proc
              sysfs        sysfs         0       0         0   -  /sys
              devpts      devpts         0       0         0   -  /dev/pts
              /dev/hdc3     ext3   4956316  141376   4559108   4% /home
              /dev/hdc1     ext3    101086   11126     84741  12% /boot
              tmpfs        tmpfs    371332       0    371332   0% /dev/shm
              none   binfmt_misc         0       0         0   -  /proc/sys/fs/binfmt_misc
              sunrpc  rpc_pipefs         0       0         0   -  /var/lib/nfs/rpc_pipefs

              實例 4

              將 /etc 底下的可用的磁盤容量以易讀的容量格式顯示

              [root@www ~]# df -h /etc
              Filesystem            Size  Used Avail Use% Mounted on
              /dev/hdc2             9.5G  3.7G  5.4G  41% /
              
              

              《Linux學習每日一個知識點》欄目是馬哥教育Linux云計算年薪20萬+的學員社群特別發起,分享Linux工具、Linux語法、Linux項目等知識點,幫助大家快速的了解Linux學習,快速步入Linux高薪的快車道。

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