Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION Instrukcja Użytkownika Pobierz pdf (Strona 256)

244 You Are Here

Summary: Piping allows you to send the output of one command as the input of an-

other command. For example: ls -al /etc | more pipes the output of the ls com-

mand to the more utility for easy viewing.

16.11 Stringing Commands Together

Linux allows you to enter multiple commands at one time. The only requirement is that you separate

the commands with a semicolon (you can see an example in Figure 16.14).

Want to see how long you’ve been online using Netscape? Just combine the date command with

Netscape’s command.

date; netscape; date

Remember that commands are case sensitive, so the command to start Netscape must be in lower-

case to start the browser.

In the xterm window, we’ll see something like this:

[billy@localhost billy]$ date; netscape; date

Saturday Mar 27 21:26:27 EST 1999

We’ll see the second date entry when we close out of Netscape. Then, our screen will look like this:

[billy@localhost billy]$ date; netscape; date

Fri Mar 26 13:26:27 EST 1999

Fri Mar 26 14:28:32 EST 1999

[billy@localhost billy]$

And the prompt will return. The discrepancy between the two results from the date command

shows that we were using Netscape for just over an hour.

16.12 Ownership and Permissions

Earlier in this chapter, when we tried to cd to root’s login directory, we received the following

friendly message:

[billy@localhost billy]$ cd /root

bash: /root: Permission denied

[billy@localhost billy]$

1 2 ... 251 252 253 254 255 256 257 258 259 260 261 ... 299 300

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Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION Instrukcja Użytkownika Strona 256