Users are experiencing high latency when accessing a web application served by a Linux machine. A systems administrator checks the network interface counters and sees the following:
Which of the following is the most probable cause of the observed latency?
The high number of errors and dropped packets in the output of the network interface counters indicate a connection problem on the network interface.
The journald entries have filled a Linux machine's /var volume. Which of the following is the best command for a systems administrator to use to free up the disk space occupied by these entries?
systemctl stop systemd-journald systemctl start systemd-journald is the best approach among the given options. Stopping and starting the systemd-journald service can help in managing the disk space used by journal logs without manually deleting log files or using more aggressive cleanup methods. This method ensures that log management is handled gracefully by the system's own services.
An administrator is provisioning an Apache web server. When the administrator visits the server website, the browser displays a message indicating the website cannot be reached. Which of the following commands should the administrator use to verify whether the service Is running?
systemctl status httpd is the correct option to check if the Apache web server (httpd) is running. The systemctl status command provides detailed information about the service, including whether it is active and running.
A Linux administrator has physically added a new RAID adapter to a system. Which of the following commands should the Linux administrator run to confirm that the device has been recognized? (Select TWO).
The following commands can help you confirm that the new RAID adapter has been recognized by the Linux system:
dmesg: This command displays the kernel messages, which can show the information about the newly detected hardware device. You can usedmesg | grep -i raidto filter the output for RAID-related messages.
The other commands are not relevant for this purpose. For example:
rmmod: This command removes a module from the Linux kernel, which is not useful for detecting a new device.
ls -l /etc: This command lists the files and directories in the /etc directory, which is not related to hardware devices.
pvdisplay: This command displays the attributes of physical volumes, which are part of the logical volume management (LVM) system, not the RAID system.
rmdir /dev: This command removes an empty directory, which is not helpful for detecting a new device. Moreover, /dev is a special directory that contains device files, and should not be removed.
Joe, a user, is unable to log in to the Linux system. Given the following output:
Which of the following commands would resolve the issue?
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