LPI 101-500 Exam With Confidence Using Practice Dumps

The mkdir command is used in a Linux environment to create a new directory. The mkdir command takes one or more arguments that specify the name and path of the directory to be created. For example, mkdir foo will create a directory named foo in the current working directory, while mkdir /home/bar will create a directory named bar in the /home directory. The mkdir command can also create multiple directories at once by using the -p option, which creates any missing parent directories along the path. For example, mkdir -p /tmp/a/b/c will create the directories /tmp, /tmp/a, /tmp/a/b and /tmp/a/b/c if they do not exist already. 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)

 The find command is used to search for files and directories that match certain criteria. The -uid option specifies the numeric user ID of the owner of the file or directory, while the -user option specifies the name of the owner. The -print option prints the full file name of the matching file or directory to the standard output. Therefore, both find /tmp -uid root -print and find /tmp -user root -print will print all files and directories within the /tmp directory or its subdirectories which are also owned by the user root. The other options are either invalid or do not perform the desired task. The -path option matches the whole path name, not just the starting directory. The -print option is implied if no other action is specified, but it is good practice to include it for clarity. References:

• LPIC-1 Exam 101 Objectives, Topic 103: GNU and Unix Commands, 103.4 Use streams, pipes and redirects
• LPIC-1 Linux Administrator 101-500 Exam FAQ, LPIC-1 Exam 101 Objectives, GNU and Unix Commands (Total Weight: 25)

The command that would disconnect the users and allow you to safely execute maintenance tasks on a disk partition is telinit 112. The telinit command is used to change the runlevel of the system, which is a mode of operation that defines what processes and services are running3. The runlevel 1, also known as single-user mode, is a mode that allows only the root user to log in, and disables all network services and graphical interfaces4. This mode is useful for performing system maintenance and recovery tasks, such as repairing a disk partition5.

The other options in the question are not correct because:

• B. shutdown -r now: This command would reboot the system immediately, without disconnecting the users gracefully or allowing you to do any maintenance tasks.
• C. killall -9 inetd: This command would kill the inetd process, which is a daemon that manages network services. This would not disconnect the users who are already logged in, and it would not stop other processes that might interfere with the maintenance tasks.
• D. /bin/netstop --maint: There is no such command in Linux.
• E. /etc/rc.d/init.d/network stop: This command would stop the network service, which would disconnect the users who are logged in remotely, but not the ones who are logged in locally. It would also not stop other processes that might interfere with the maintenance tasks.

References:

1: How to Change Runlevels (targets) in SystemD - Tecmint 2: How to Boot into Single User Mode in CentOS/RHEL 7 - Tecmint 3: Runlevel - Wikipedia 4: Single-user mode - Wikipedia 5: How to Repair a Corrupted Linux File System - Linux.com : [shutdown(8) - Linux manual page] : [inetd(8) - Linux manual page] : [How to Start/Stop or Enable/Disable firewalld on CentOS 7 - Tecmint]