FreeBSD 2.0 äëÿ ÷àéíèêîâ


         

Ïpè íàëè÷èè èäóùèõ ïîäpÿä ïóñòûõ


                               ¦              ¦

                               ¦ 1  Number 1  ¦

                               ¦ 2  Number 2  ¦

                               ¦ 3  Number 3  ¦

                               ¦ 4  Number 4  ¦

                               ¦ 5            ¦

                               ¦ 6            ¦

                               ¦ 7  Number 5  ¦

                               L---------------

    7. Ïpè íàëè÷èè èäóùèõ ïîäpÿä ïóñòûõ ñòpîê âûâîäèòü òîëüêî îäíó.

                               ---------------¬

                               ¦ cat -s file1 ¦

                               L---------------

    8. Âûâîäèòü ñèìâîëû òàáóëÿöèè, êàê ^I:

                               ---------------¬

                               ¦ cat -t file1 ¦

                               +--------------+

                               ¦  Number 1    ¦

                               ¦  ^INumber 2  ¦

                               ¦  ^INumber 3  ¦

                               L---------------

                             14.6. Êîìàíäà ECHO.

    Ïîçíàêîìèìñÿ åùå ñ îäíîé êîìàíäîé,  àíàëîã êîòîpîé èìååòñÿ â  DOS-ñèòåìàõ.

Ýòî êîìàíäà "echo" (ýõî).

    Îíà èìååò ôîpìàò:

                          ------------------------¬

                          ¦ echo [-n] [arg ...]   ¦

                          ¦                       ¦

                          ¦ /bin/echo [ arg ] ... ¦

                          L------------------------

    Êîìàíäà "echo" âûâîäèò íà óñòðîéñòâî ñòàíäàðòíîãî âûâîäà çàäàííûå åé àðãó-

ìåíòû, ðàçäåëÿÿ èõ ïðîáåëàìè è çàâåðøàÿ èõ ñèìâîëîì íîâîé ñòðîêè (\n).

    Ýòà êîìàíäà  óäîáíà äëÿ ôîðìèðîâàíèÿ äèàãíîñòè÷åñêèõ ñîîáùåíèé â êîìàíäíûõ

ôàéëàõ è äëÿ ïåðåäà÷è èçâåñòíûõ äàííûõ â ïðîãðàììíîì êàíàëå.

    Âîçìîæåí ïàðàìåòð:

     -n     Íå âûâîäèòü çàâåpøaþùèé ñèìâîë ïåðåâîäà ñòðîêè.


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