关于Redirection and Pipes的问题 [复制链接]

本帖最后由 afton 于 2010.-03-14 05:12 编辑. .

http://upload.bbs.csuboy.com/Mon_1004/93_7070_9b620f33a380b5e.gif[/img]  http://upload.bbs.csuboy.com/Mon_1004/93_7070_7bb66ec37685087.jpg[/img]下载 (16.34 KB)            杀毒

2.010-03-14 05:03电影

1。Write a single command that will sort the .contents of file4 reversely cr.eated in the question above, and appen.d the sorted content.s to file3, meanwhile display .it on the screen one page at a time. Your current working directo.ry is /home Use relative paths only.学习

我写的是：sort -r sue./dir1/file4|tee -a tom/docs/fil.e3.

2。 Use the echo command to display .the text "Last li.ne" but instead. of displaying    健康
   th.e tex.t on the screen append it to the file called m.ail2 in the mail directory. Use an absolute pathname.             汽车

我写的是:. echo "Last line" > /m.ail/mail2.

但是最后说我的不对，请问，问题出在哪里.呢？.

谢谢高手帮忙


对了，我的第一个问题前面的问题是Write a single command that will list all of the users currently logged in to the system sorted by user name, redirecting the output to a file c.alled file4 .in the dir1 dir.ectory. Use r.elative paths only. Y.our curr.ent working directory is /home/sue          婚庆
这个我已经做出来了。

没有人回答吗

QUOTE:但是最后说我的不对


什么提示？谁说的？有错误提示么？

第一个提示是：The command is: sort and you need an option
You will need the tee command with an option
You will need to pipe the final output to another command

第二个问题提示：The command is: echo "Last line"
You will need to use output redirection

这个是shell的提示么？还是你在用什么在线考试系统？

都没有人知道吗

第二个问题我自己解决了，现在就剩第一个问题了。