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·	cat ,more, Less区别

·	cat ,more, Less区别

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cat ,more, Less区别

<DIV>使用cat more less都可以查看文本内容，但是它们三者有什么区别呢？ more和less的功能完全重复吗？ 以下是我个人的总结，欢迎大家一起来分享 cat&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;连续显示、查看文件内容 more&nbsp; &nbsp; &nbsp; &nbsp; 分页查看文件内容 less&nbsp; &nbsp; &nbsp; &nbsp; 分页可控制查看文件内容 通俗点说： cat一次性把文件内容全部显示出来，管你看不看得清，显示完了cat命令就返回了，不能进行交互式操作，适合察看内容短小、不超过一屏的文件； more比cat强大一点，支持分页显示，你可以ctrl+B ctrl+F .....上下滚屏，但是不支持像shift+G（跳到文件尾）这种操作； less比more更强大一点，支持各种命令，随便翻页、跳转、查找.....想怎么看，就怎么看，爱怎么看，就怎么看。 附less的帮助内容 [code] &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; SUMMARY OF LESS COMMANDS &nbsp; &nbsp;&nbsp; &nbsp;Commands marked with * may be preceded by a number, N. &nbsp; &nbsp;&nbsp; &nbsp;Notes in parentheses indicate the behavior if N is given. &nbsp;&nbsp;h&nbsp;&nbsp;H&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Display this help. &nbsp;&nbsp;q&nbsp;&nbsp;:q&nbsp;&nbsp;Q&nbsp;&nbsp;:Q&nbsp;&nbsp;ZZ&nbsp; &nbsp;&nbsp;&nbsp;Exit. --------------------------------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;MOVING &nbsp;&nbsp;e&nbsp;&nbsp;^E&nbsp;&nbsp;j&nbsp;&nbsp;^N&nbsp;&nbsp;CR&nbsp;&nbsp;*&nbsp;&nbsp;Forward&nbsp;&nbsp;one line&nbsp; &nbsp;(or N lines). &nbsp;&nbsp;y&nbsp;&nbsp;^Y&nbsp;&nbsp;k&nbsp;&nbsp;^K&nbsp;&nbsp;^P&nbsp;&nbsp;*&nbsp;&nbsp;Backward one line&nbsp; &nbsp;(or N lines). &nbsp;&nbsp;f&nbsp;&nbsp;^F&nbsp;&nbsp;^V&nbsp;&nbsp;SPACE&nbsp;&nbsp;*&nbsp;&nbsp;Forward&nbsp;&nbsp;one window (or N lines). &nbsp;&nbsp;b&nbsp;&nbsp;^B&nbsp;&nbsp;ESC-v&nbsp; &nbsp;&nbsp; &nbsp;*&nbsp;&nbsp;Backward one window (or N lines). &nbsp;&nbsp;z&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Forward&nbsp;&nbsp;one window (and set window to N). &nbsp;&nbsp;w&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Backward one window (and set window to N). &nbsp;&nbsp;ESC-SPACE&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;*&nbsp;&nbsp;Forward&nbsp;&nbsp;one window, but don't stop at end-of-file. &nbsp;&nbsp;d&nbsp;&nbsp;^D&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Forward&nbsp;&nbsp;one half-window (and set half-window to N). &nbsp;&nbsp;u&nbsp;&nbsp;^U&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Backward one half-window (and set half-window to N). &nbsp;&nbsp;ESC-)&nbsp;&nbsp;RightArrow *&nbsp;&nbsp;Left&nbsp;&nbsp;one half screen width (or N positions). &nbsp;&nbsp;ESC-(&nbsp;&nbsp;LeftArrow&nbsp;&nbsp;*&nbsp;&nbsp;Right one half screen width (or N positions). &nbsp;&nbsp;F&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Forward forever; like "tail -f". &nbsp;&nbsp;r&nbsp;&nbsp;^R&nbsp;&nbsp;^L&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;Repaint screen. &nbsp;&nbsp;R&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Repaint screen, discarding buffered input. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;--------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Default "window" is the screen height. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Default "half-window" is half of the screen height. --------------------------------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;SEARCHING &nbsp;&nbsp;/pattern&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Search forward for (N-th) matching line. &nbsp;&nbsp;?pattern&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Search backward for (N-th) matching line. &nbsp;&nbsp;n&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Repeat previous search (for N-th occurrence). &nbsp;&nbsp;N&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Repeat previous search in reverse direction. &nbsp;&nbsp;ESC-n&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Repeat previous search, spanning files. &nbsp;&nbsp;ESC-N&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Repeat previous search, reverse dir. &amp; spanning files. &nbsp;&nbsp;ESC-u&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Undo (toggle) search highlighting. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;--------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Search patterns may be modified by one or more of: &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;^N or !&nbsp;&nbsp;Search for NON-matching lines. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;^E or *&nbsp;&nbsp;Search multiple files (pass thru END OF FILE). &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;^F or @&nbsp;&nbsp;Start search at FIRST file (for /) or last file (for ?). &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;^K&nbsp; &nbsp;&nbsp; &nbsp; Highlight matches, but don't move (KEEP position). &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;^R&nbsp; &nbsp;&nbsp; &nbsp; Don't use REGULAR EXPRESSIONS. --------------------------------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;JUMPING &nbsp;&nbsp;g&nbsp;&nbsp;&lt;&nbsp;&nbsp;ESC-&lt;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Go to first line in file (or line N). &nbsp;&nbsp;G&nbsp;&nbsp;&gt;&nbsp;&nbsp;ESC-&gt;&nbsp; &nbsp;&nbsp; &nbsp; *&nbsp;&nbsp;Go to last line in file (or line N). &nbsp;&nbsp;p&nbsp;&nbsp;%&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Go to beginning of file (or N percent into file). &nbsp;&nbsp;t&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Go to the (N-th) next tag. &nbsp;&nbsp;T&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Go to the (N-th) previous tag. &nbsp;&nbsp;{&nbsp;&nbsp;(&nbsp;&nbsp;[&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Find close bracket } ) ]. &nbsp;&nbsp;}&nbsp;&nbsp;)&nbsp;&nbsp;]&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;Find open bracket { ( [. &nbsp;&nbsp;ESC-^F &lt;c1&gt; &lt;c2&gt;&nbsp;&nbsp;*&nbsp;&nbsp;Find close bracket &lt;c2&gt;. &nbsp;&nbsp;ESC-^B &lt;c1&gt; &lt;c2&gt;&nbsp;&nbsp;*&nbsp;&nbsp;Find open bracket &lt;c1&gt; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;--------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Each "find close bracket" command goes forward to the close bracket &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; matching the (N-th) open bracket in the top line. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Each "find open bracket" command goes backward to the open bracket &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; matching the (N-th) close bracket in the bottom line. &nbsp;&nbsp;m&lt;letter&gt;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;Mark the current position with &lt;letter&gt;. &nbsp;&nbsp;'&lt;letter&gt;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;Go to a previously marked position. &nbsp;&nbsp;''&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Go to the previous position. &nbsp;&nbsp;^X^X&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;Same as '. &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;--------------------------------------------------- &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;A mark is any upper-case or lower-case letter. %2

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发表于:2007-06-26 ┆ 阅读(554) ┆ 评论(0)

cat ,more, Less区别

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2007年03月05日

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APACHE FileUpload parseRequest 异常

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