You are trying to make a hard link to an ordinary file but ln returns an error. Which of the following could cause this?
Correct Answer: E
Explanation A hard link is a directory entry that refers to the same inode as another file. An inode is a data structure that stores the metadata and the location of the data blocks of a file. A hard link allows multiple names to refer to the same file content, as long as they are on the same filesystem. However, if the source and the target of the hard link are on different filesystems, the ln command will return an error, because the inode numbers are not consistent across different filesystems. Therefore, the ln command cannot create a hard link that crosses filesystem boundaries. The other options are either incorrect or not applicable. The source file being hidden, read-only, a shell script, or not owned by the user does not prevent the creation of a hard link, as long as the user has the permission to write to the target directory and the source and the target are on the same filesystem. References: * LPIC-1 Exam 101 Objectives, Topic 103: GNU and Unix Commands, 103.3 Perform basic file management * LPIC-1 Linux Administrator 101-500 Exam FAQ, LPIC-1 Exam 101 Objectives, GNU and Unix Commands (Total Weight: 25)
Question 132
Which of the following apt-get subcommands installs the newest versions of all currently installed packages?
Correct Answer: B
Explanation The apt-get subcommand that installs the newest versions of all currently installed packages is dist-upgrade. The dist-upgrade subcommand performs the same function as the upgrade subcommand, which is to install the latest versions of the packages that are already installed on the system, but it also intelligently handles the dependencies and removes the obsolete packages if necessary. The dist-upgrade subcommand is useful when upgrading the entire system to a new release or distribution12. The other options are either invalid or do not perform the desired task. The auto-update subcommand does not exist, and the update subcommand only updates the list of available packages from the repositories, but does not install any packages. The full-upgrade subcommand is an alias for the dist-upgrade subcommand, so it performs the same function, but it is not the standard name for the subcommand. The install subcommand installs new packages or specific versions of packages, but it does not upgrade all the currently installed packages. References: * Linux Essentials - Linux Professional Institute Certification Programs1 * Exam 101 Objectives - Linux Professional Institute2 * APT-GET Command in Linux {Detailed Tutorial With Examples} - phoenixNAP3 * How do I get help on apt-get's install subcommand? * APT Cheat Sheet | Packagecloud Blog
Question 133
In order to display all currently mounted filesystems, which of the following commands could be used? (Choose two.)
