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Unix Disk Space Usage Command

  • By on May 8, 2009 | No Comments

    Disk usage, du is a good Unix command to check on the disk space usage in Unix platform. To list down the files and directories usage in kB, refer the Unix command below: –

    UNIX> du -sk *
    52704   oracle
    4312    tmp
    3064    var
    480     core
    96      log
    48      database
    40      applications
    24      temp
    20      dbf
    20      opt
     
    -s was instead of the default output, report only the 
    total sum for each of the specified files.
    -k was write the files size in units of 1024 bytes, rather 
    than the default 512-byte units.
    UNIX> du -sh *
    4.0K    oracle.xml
    20K     wordpress.php
    8.0K    sap.xml
    4.0K    index.php
    4.0K    space.sh
    4.0K    tools.php
    4.0K    datafiles.dbf
    4.0K    indexfiles.dbf
     
    -s was instead of the default output, report only the 
    total sum for each of the specified files.
    -h option provides "Human-readable" output.

    If you need to sort the file according to the size, you may use the sorting function in Unix together with the du command as below: –

    UNIX> du -sk .[A-z]* *|sort -n
    24      php.ini
    48      sitemap.xml
    480     smartoptimizer
    3064    wp-admin
    4312    wp-includes

    To show the largest ten files or directories in the current directory, you can use the Unix command as below: –

    UNIX> du -s * | sort -nr | head
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