cat ,more, Less区别(转)

转:http://blog.chinaunix.net/u/4637/showart_328633.html

cat ,more, Less区别 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 连续显示、查看文件内容 more 分页查看文件内容 less 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] SUMMARY OF LESS COMMANDS Commands marked with * may be preceded by a number, N. Notes in parentheses indicate the behavior if N is given. h H Display this help. q :q Q :Q ZZ Exit. --------------------------------------------------------------------------- MOVING e ^E j ^N CR * Forward one line (or N lines). y ^Y k ^K ^P * Backward one line (or N lines). f ^F ^V SPACE * Forward one window (or N lines). b ^B ESC-v * Backward one window (or N lines). z * Forward one window (and set window to N). w * Backward one window (and set window to N). ESC-SPACE * Forward one window, but don't stop at end-of-file. d ^D * Forward one half-window (and set half-window to N). u ^U * Backward one half-window (and set half-window to N). ESC-) RightArrow * Left one half screen width (or N positions). ESC-( LeftArrow * Right one half screen width (or N positions). F Forward forever; like "tail -f". r ^R ^L Repaint screen. R Repaint screen, discarding buffered input. --------------------------------------------------- Default "window" is the screen height. Default "half-window" is half of the screen height. --------------------------------------------------------------------------- SEARCHING /pattern * Search forward for (N-th) matching line. ?pattern * Search backward for (N-th) matching line. n * Repeat previous search (for N-th occurrence). N * Repeat previous search in reverse direction. ESC-n * Repeat previous search, spanning files. ESC-N * Repeat previous search, reverse dir. & spanning files. ESC-u Undo (toggle) search highlighting. --------------------------------------------------- Search patterns may be modified by one or more of: ^N or ! Search for NON-matching lines. ^E or * Search multiple files (pass thru END OF FILE). ^F or @ Start search at FIRST file (for /) or last file (for ?). ^K Highlight matches, but don't move (KEEP position). ^R Don't use REGULAR EXPRESSIONS. --------------------------------------------------------------------------- JUMPING g < style="font: normal normal normal 12px/normal song, Verdana; "> G > ESC-> * Go to last line in file (or line N). p % * Go to beginning of file (or N percent into file). t * Go to the (N-th) next tag. T * Go to the (N-th) previous tag. { ( [ * Find close bracket } ) ]. } ) ] * Find open bracket { ( [. ESC-^F * Find close bracket . ESC-^B * Find open bracket --------------------------------------------------- Each "find close bracket" command goes forward to the close bracket matching the (N-th) open bracket in the top line. Each "find open bracket" command goes backward to the open bracket matching the (N-th) close bracket in the bottom line. m Mark the current position with . ' Go to a previously marked position. '' Go to the previous position. ^X^X Same as '. --------------------------------------------------- A mark is any upper-case or lower-case letter. %2