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File/Diffutils/Less  

2009-01-13 13:09:09|  分类: linux-system |  标签: |举报 |字号 订阅

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The File package contains a utility for determining the type of a given file or files.

file
    Tries to classify each given file; it does this by performing several tests—file system tests, magic number tests, and language tests


libmagic
    Contains routines for magic number recognition, used by the file program
=====================================================================================
The Diffutils package contains programs that show the differences between files or directories.

cmp
    Compares two files and reports whether or in which bytes they differ
diff
    Compares two files or directories and reports which lines in the files differ
diff3
    Compares three files line by line
sdiff
    Merges two files and interactively outputs the results

====================================================================================
The Less package contains a text file viewer.

less
    A file viewer or pager; it displays the contents of the given file, letting the user scroll, find strings, and jump to marks
lessecho
    Needed to expand meta-characters, such as * and ?, in filenames on Unix systems
lesskey
    Used to specify the key bindings for less
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