In which directory tree are files modified when changing kernel parameters using the command sysctl? A. /sys/kernel/ B. /proc/kernel/ C. /proc/sys/ D. /lib/sys/ E. /sys/proc/

Which of the filter keywords below could be used in the following command: tcpdump -i eth0 ____________ 203.0.113.8 (Choose three.) A. host B. ip C. src D. dst E. ipv6

What command is used to send messages to all users currently logged in? (Specify ONLY the command without any path or parameters.)

In order to gather performance data with sar over a longer period of time, which command should be run periodically from cron? A. sar B. sarmon C. sarec D. sadf E. sarcron

Which sub command to cryptsetup shows information about an encrypted LUKS partition? A. luksDump B. luksInfo C. luksDebug D. luksLS E. luksShow

What command discards unused blocks on a mounted file system in order to support SSD devices? (Specify ONLY the command without any path or parameters.)

A web application server contains 64GB of RAM and two swap partitions on normal hard disk drives, each with a size of 64 GB. Within the last month, the average number of user sessions on this server h...

Which of the following configuration files are used by tcpwrapper? A. /etc/tcpd.allow and etc/tcpd.deny B. /etc/tcpwrapper.allow and /etc/tcpwrapper.deny C. /etc/hosts.allow and /etc/hosts.deny ...

Which of the following is a userspace application used to modify EFI entries on a Linux system? A. efieditor B. configefi C. efimanager D. efibootmgr E. efibootedit

What is the purpose of a systemd mount unit? A. It is used by the command systemd-mount and allows users to mount partitions to mount points of their choice B. It is used only to mount network fil...