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  • df, du and tree in Linux

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    df, du and tree in Linux


    The 'df' command is the simplest tool to view disk usage. Using it without any switches will display the result in block of usage which is not understandable especially for home users. Use the '-h' switch to make it human readable form i.e. the displayed disk usage will be in Megabytes, Kilobytes or Gigabytes. To check the inode usage use '-i'  switch.


    Filesystem Size Used Avail Use% Mounted on
    /dev/hda7 996M 525M 420M 56% /
    /dev/hda2 3.0G 1.1G 1.8G 39% /anup
    /dev/hda6 99M 9.2M 85M 10% /boot
    /dev/shm 236M 0 236M 0% /dev/shm
    /dev/hda8 487M 11M 451M 3% /home
    /dev/hda10 996M 35M 910M 4% /tmp
    /dev/hda12 7.2G 3.6G 3.3G 53% /usr
    /dev/hda11 996M 157M 787M 17% /var


    The 'du' show file and directory usage otherwise it is much similar to the 'df' command. By using again the command without the switch can be grasped only by a hi-fi system admin working on over five hundred server machines. To make it understandable use 'du -h /foldername'. If you have tried this command along with us, then you know it shows a recursive output digging into every file and folder under the folder name your have specified. To avoid recursive output and obtain just the file size of the single directory or folder issue 'du - hs/directory'.


    /root@amuk etc/# du -hs/digit/
    1.1G /digit

    The tree command is not unique to Linux. It was there in MS -DOS too, but Microsoft discontinued it in Windows. This command gives a diagrammatic representation of the directory structure much like the pstree command..


    Thanks for reading..

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