Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION User Manual download pdf (Page 255)

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101

16.10 Pipes 243

One answer is to pipe the output to a utility called less. Known as a pager, less, (like more) allows

us to view information one page (or screen) at a time.

We use the vertical bar (|) to pipe the commands (as shown in Figure 16.15).

ls -al /etc | less

Now we can view the contents one screen at a time. To move forward a screen, just press

Space ;to

move back a screen, press

B ;toquit,justpress Q .

Figure 16.15: Piping the output of ls to the less pager

Actually, we’ve already been using pipes, before we even discussed what they were.

In previous references to man pages, we used the following to print out the man page entry:

man ls | col -b | lpr

Here, we’re sending the output of man ls to a ﬁlter called col with an option of -b to help format

the text for the printer, then we sent the output of that to the printer using the lpr command.

1 2 ... 250 251 252 253 254 255 256 257 258 259 260 ... 299 300

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