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In computing, the utility diff is a data comparison tool that computes and displays the differences between the contents of files. Unlike edit distance notions used for other purposes, diff is line-oriented rather than character-oriented, but it is like Levenshtein distance in that it tries to determine the smallest set of deletions and insertions to create one file from the other.
Removes (deletes) files, directories, device nodes and symbolic links rmdir: Removes empty directories shred: Overwrites a file to hide its contents, and optionally deletes it sync: Flushes file system buffers touch: Changes file timestamps; creates file truncate: Shrink or extend the size of a file to the specified size vdir: Is exactly like ...
Displaying the differences between two or more sets of data, file comparison tools can make computing simpler, and more efficient by focusing on new data and ignoring what did not change. Generically known as a diff [ 1 ] after the Unix diff utility , there are a range of ways to compare data sources and display the results.
Xdelta [3] is a command line tool for delta encoding, which stores or transmits the difference (deltas) between sequential data, instead of entire files.This is similar to diff and patch, except diff computes and shows the difference between two complete files, while patch is primarily designed for human-readable text files; Xdelta is designed for binary files and does not generate human ...
The difference is an exact number of quarters of an hour up to 95 (same minutes modulo 15 and seconds) if the file was transported across zones; there is also a one-hour difference within a single zone caused by the transition between standard time and daylight saving time (DST). Some, but not all, file comparison and synchronisation software ...
comm finds lines in common between two files, -23 suppresses lines unique to the second file, and those that are common to both, leaving only those that are found only in the first file named. The - in place of a filename causes comm to use its standard input (from the pipe line in this case).
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In computing, cmp is a command-line utility on Unix and Unix-like operating systems that compares two files of any type and writes the results to the standard output.By default, cmp is silent if the files are the same; if they differ, the byte and line number at which the first difference occurred is reported.