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If you need to find the PID for your Samba server, the first thing to do is use ps aux | grep smbd This command generates a listing of all processes, filters only the lines that have smbd (the Samba daemon), and displays them oes # ps aux | grep smbd root 4621 00 03 9029 3212 Ss 08:48 0:00 /usr/sbin/smbd root 11919 00 00 1696 644 pts/50 S+ 12:39 0:00 grep smb 2 Notice that most times, a command like ps aux | grep smbd shows you two lines The first line is the one that matters: it displays information about the Samba daemon The second line is the result of the command itself; here it s grep smb You can safely ignore this line 3.

will be displayed. (You can find all the options available in the YUI Library documentation for the Tooltip control.) If you now run the page and hover the mouse over the search text field, you should see the tooltip pop up after a short delay, as shown in Figure 8-15.

From the output of ps aux | grep smbd, you have learned that the process ID of the Samba daemon is 4621 Thus, the next step is to restart this process by sending it the SIGHUP signal Use kill SIGHUP 4621 to do so..

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It s very important to know how Linux permissions are applied. Although in Open Enterprise Server all management of users and files is performed from the Novell management tools, let s take a look at the classic method for handling permissions on a Linux system. This is useful knowledge if you ever need to do any serious troubleshooting on your Open Enterprise Server or configure it to exchange information with other Linux-based systems.

Figure 8-15. Activated YUI Library Tooltip control It is possible to implement standard browser tooltips without having to use a third-party library such as the YUI Library. The purpose of this example was simply to demonstrate how integrating third-party libraries is not as difficult as it might first appear.

Note The source code presented here is not meant to necessarily show the best way to code a .NET web

Note As compared to the advanced possibilities Novell offers to work with permissions, users, and groups, the use of Linux permissions is rather limited. Refer to 9 for more information about the way permissions are handled in a Novell environment. Be aware, however, that these permissions can only be applied if you re using NSS (see 11) as the file system or NCP (see 10 as well) as the file access protocol.

Summary

The basic element needed to work with permissions on a Linux system is the Linux user. In the most elementary way, this user is defined in the ASCII text file /etc/passwd (see Listing 4-2). A long time ago (for some brands of UNIX not so long ago) encrypted passwords were stored in this

The goal of this chapter was to show how easily you can use Ajax and JavaScript to add a little something extra to your applications, and it really only scratched the surface of what you can do with Ajax (since entire books have been devoted to that subject) But please do not go away thinking that every application you write from now on must use Ajax! You should exercise some common sense when thinking about if and where to use this sort of functionality There are many examples of web sites on the Internet that are truly dreadful to use, simply because they have tried to use Ajax everywhere For example, one news-related web site s performance was somewhere between horrendous and absolutely dire.

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