tailieunhanh - Unix for mac your visual blueprint to maximizing the foundation of mac osx phần 3

Như với các lệnh cp và mv, xóa các tập tin có thể nguy hiểm vì mọi người có thể mắc sai lầm. Bạn có thể sử dụng tùy chọn-i để cho lệnh rm để xác nhận rằng bạn muốn xóa một tập tin, nếu bạn làm, bạn có thể gõ y cho có, và nhấn Return. | WORK WITH TEXT 4 u . i .r- Additional options in the Ipr and enscript commands give you even greater control over the appearance of your printed page. The -o option of Ipr allows you to set specific printing options. -O OPTION PRINT EFFECT -o landscape Print in landscape or wide mode. -o media Legal Print on legal-sized paper. -o media A4 Print on A4 European standard paper. -o number-up 2 Print two pages per sheet of paper. -o number-up 4 Print four pages per sheet of paper. -o number-up 8 Print eight pages per sheet of paper. -o number-up 16 Print sixteen pages per sheet of paper. -o prettyprint Print a header with the date and filename. The enscript command has even more options that you can use to generate or print PostScript output. For a more complete list see the manual page for the enscript command by typing man enscript. PRINT A FILE ON A POSTSCRIPT PRINTER L n Type enscript and a space. 0 Type the name of a file and press Return. The printer prints the file. PRINT AN UNDERLAY__ -n Type enscript --underlay . 0 Type the underlay text in single quotes and a space. H Type the name of the file and press Return. The printer outputs the file with the text running diagonally beneath it. 59 UNIX FOR MAC OPEN A FILE WITH PICO You can edit text files with Pico a basic and easy-to-use text editor. The function of a text editor is to enable you to open edit and save plain-text files. Mac OS X provides several text editors for this purpose. Text editors are less complex than word processors they do not allow you to select fonts layouts or other factors that affect the look of the printed page. Three shell editors come with Mac OS X they are Pico vi and emacs. Although they accomplish the same basic task of editing text each one has its own strengths and limitations. Pico is the simplest to use because all keystroke commands appear on-screen and there are not many to learn. Because of its simplicity Pico is a good choice for new users of the Mac OS X shell as well