Open The Main (Free Web Host) KDE Menu And Choose UserMode

Open the main KDE menu and choose UserMode Linux.LIDS On. 2.When the happy penguin appears, log in as user root(the password is 12qwaszx) (see Figure 58-1). Figure 58-1: The UML login screen. When you re inside a UML VM, you have com- plete access to the hostfile system through thedirectory /mnt/host. If you peek at /mnt/host, you ll see subdirectories like /mnt/host/bin, /mnt/host/etc, /mnt/host/usr, and /mnt/host/ home. Those directories correspond to the /bin, /etc, /usr, and /homedirectories on the hostcomputer. That s not a good arrangement when you re trying to block off access to those files. 3.To close that security hole, find a directory thatyou do want to expose to the jail (or better yet, just create an empty directory) and grant theVM access to that directory instead. For example, create a staging area like this: # mkdir /tmp/uml/jailRun that command in the host, not in the UML VM. Be sure that the /tmp/uml/jaildirectorycontains no symbolic links to the rest of thehost system. Use the ls -lcommand to listthe directory contents; if any of the permis- sions begin with an l, they re symbolic linksand should be deleted. Any files that you put into /tmp/uml/jailwillappear inside the VM in the directory /mnt/host. After you create the jail and add files to it, adjust thescript that boots your VM: 1.Open the file /usr/bin/umlwith your favoriteeditor. 2.Find the line (near the top of the file) that the line to readLIDS_KERNEL= Don t forget the quotes, or your UML VMwon t boot. 4.Find the line that line should be just below the line in Step 2.5.Change the line to readSELINUX_KERNEL= 6.Save your work and close the editor. Now you can easily copy files between the host andthe VM to populate your UML jail. You can copyfiles into (or out of) /tmp/uml/jailfrom your hostsystem. Inside the VM, copy files into (or out of) /mnt/host. It doesn t get any quicker or easier than that.
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