Linux Essentials Exam Questions with Verified Solutions

What are the differences between hard disk drives and solid state disks? Hard disks have a motor and moving parts, solid state disks do not. Reverse DNS assigns hostnames to IP addresses. How is the name of the IP address 198.51.100.165 stored on a DNS server? In the PTR record for . Which of the following types of bus can connect hard disk drives with the motherboard? The SATA bus Members of a team already have experience using Red Hat Enterprise Linux. For a small hobby project, the team wants to set up a Linux server without paying for a subscription. Which of the following Linux distributions allows the team members to apply as much of their Red Hat Enterprise Linux knowledge as possible? CentOS What information can be displayed by top? Running processes, ordered by CPU or RAM consumption. Which of the following commands can be used to resolve a DNS name to an IP address? host Which of the following outputs comes from the command free? Will display the amount of free,used shared,total and available memory. What is true about the dmesg command? It might not display older information because it was overwritten by newer information. Which of the following outputs could stem from the command last? root tty2 Wed May 17 21:11 - 21:11 (00:00) What is the UID of the user root? 0 Which permissions are set on a regular file once the permissions have been modified with the command chmod 654 ? -rw-r-xr-- What is true about the owner of a file? Each file is owned by exactly one user and one group. Which of the following permissions are set on the /tmp/ directory? rwxrwxrwt Which command adds the new user tux and creates the user's home directory with default configuration files? useradd ג€"m tux What keyword is used in a shell script to begin a loop