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2. df (Unix) - Wikipedia

   en.wikipedia.org/wiki/Df_(Unix)

   Write the amount of free space of the file system containing the specified file Most implementations of df in Unix and Unix-like operating systems include extra options. The BSD and GNU coreutils versions include -h , which lists free space in human readable format displaying units with the appropriate SI prefix (e.g. 10 MB [ 5 ] ), -i , which ...

3. du (Unix) - Wikipedia

   en.wikipedia.org/wiki/Du_(Unix)

   du (abbreviated from disk usage) is a standard Unix program used to estimate file space usage—space used under a particular directory or files on a file system. A Windows commandline version of this program is part of Sysinternals suite by Mark Russinovich.

4. F2FS - Wikipedia

   en.wikipedia.org/wiki/F2FS

   F2FS (Flash-Friendly File System) is a flash file system initially developed by Samsung Electronics for the Linux kernel. [ 5 ] The motive for F2FS was to build a file system that, from the start, takes into account the characteristics of NAND flash memory -based storage devices (such as solid-state disks , eMMC , and SD cards), which are ...

5. List of POSIX commands - Wikipedia

   en.wikipedia.org/wiki/List_of_POSIX_commands

   Sort, merge, or sequence check text files Version 1 AT&T UNIX split: Misc Mandatory Split files into pieces Version 3 AT&T UNIX strings: C programming Mandatory Find printable strings in files 2BSD strip: C programming Optional (SD) Remove unnecessary information from executable files Version 1 AT&T UNIX stty: Misc Mandatory Set the options for ...

6. Free-space bitmap - Wikipedia

   en.wikipedia.org/wiki/Free-space_bitmap

   A separate array then stores the number of free sectors in each chunk, so chunks with insufficient space can be easily skipped over, and the total amount of free space is easier to compute. Finding free space now entails searching the summary array first, then searching the associated bitmap chunk for the exact sectors available. [1]

7. Btrfs - Wikipedia

   en.wikipedia.org/wiki/Btrfs

   Deleting this sparse file frees up the space and makes the conversion permanent. [67] In 4.x versions of the mainline Linux kernel, the in-place ext3/4 conversion was considered untested and rarely used. [67] However, the feature was rewritten from scratch in 2016 for btrfs-progs 4.6. [47] and has been considered stable since then.

8. ext3 - Wikipedia

   en.wikipedia.org/wiki/Ext3

   However, this strategy works only if the file system has enough free space. A true defragmentation tool does not exist for ext3. [21] However, as the Linux System Administrator Guide states, "Modern Linux filesystem(s) keep fragmentation at a minimum by keeping all blocks in a file close together, even if they can't be stored in consecutive ...

9. Trim (computing) - Wikipedia

   en.wikipedia.org/wiki/Trim_(computing)

   The support for TRIM also varies by what the particular filesystem driver on the operating system is capable of, since only a program with an understanding of what parts of the disk are free space can safely issue the command, and on the system level this ability tends to lie in the filesystem driver itself.