A systems administrator has received reports of intermittent network connectivity to a particular website.
Which of the following is the BEST command to use to characterize the location and type of failure over the course of several minutes?

A Linux systems administrator installed a new web server, which failed while attempting to start. The administrator suspects that SELinux is causing an issue and wants to temporarily put the system into permissive mode. Which of the following would allow the administrator to accomplish this?

A Linux server needs to be accessed, but the root password is not available.
Which of the following would BEST allow an administrator to regain access and set a new known password at the same time?

A Linux administrator receives a call from the network operations team that one of the database applications is down on a Linux server. The Linux server is configured with RAID 1 for redundancy, and the array /dev/md0 consists of two devices called /dev/sda1 and /dev/sdb1. After looking at the status of the RAID 1 array in the
/proc/mdstat file, the administrator discovers the RAID 1 array is degraded and the disk /dev/sdb1 on which the database application was installed appears to have failed.

Which of the following steps should the administrator take to remove the device /dev/sdb1 from the RAID array md0? (Choose two.)

A junior Linux administrator is setting up system-wide configuration settings. The goal is to ensure the PATH environment variable includes the following locations for all users who log into a Linux system:

The administrator issues the following commands at the terminal:

Respectively, the output of these commands is as follows:

Given this output, which of the following would be the BEST action for the administrator to perform to address this issue?