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In computer programming, a usage message or help message is a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program.
-c, display a grand total of the disk usage found by the other arguments-d #, the depth at which summing should occur. -d 0 sums at the current level, -d 1 sums at the subdirectory, -d 2 at sub-subdirectories, etc.-H, calculate disk usage for link references specified on the command line-k, show sizes as multiples of 1024 bytes, not 512-byte
Example of qgroup (quota group) of a Btrfs filesystem. A disk quota is a limit set by a system administrator that restricts certain aspects of file system usage on modern operating systems. The function of using disk quotas is to allocate limited disk space in a reasonable way. [1]
The last modification date stamp (and with DELWATCH 2.0+ also the file deletion date stamp, and since DOS 7.0+ optionally also the last access date stamp and creation date stamp), are stored in the directory entry with the year represented as an unsigned seven bit number (0–127), relative to 1980, and thereby unable to indicate any dates in ...
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Therefore, the creation date stored by ext4 is currently only available to user programs on Linux via the statx() API. [24] Project quotas Support for project quotas was added in Linux kernel 4.4 on 8 Jan 2016. This feature allows assigning disk quota limits to a particular project ID. The project ID of a file is a 32-bit number stored on each ...
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The term "real time" in this context refers to elapsed wall-clock time, like using a stop watch. The total CPU time (user time + sys time) may be more or less than that value. Because a program may spend some time waiting and not executing at all (whether in user mode or system mode) the real time may be greater than the total CPU time.