How can the kernel parameter for the maximum size of the shared memory segment (shmmax) be changed to 2GB (2147483648 Bytes) on a running system? (Choose TWO correct answers.)
A database application requires a maximum shared memory segment (shmmax) of 2GB (2147483648 Bytes). Which configuration file should be modified to set this kernel parameter permanently? (Specify the full name of the file, including path.)
Which directory contains the system-specific udev rule files? (Specify the absolute path including the directory name)
In the following output from top, which processes contribute to the percentage of time that the CPU spends in the state of wa?
Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st
In the following output, what percentage of time was the CPU waiting for pending I/O?
# vmstat 1 100
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0
What option in the collectd configuration file is required in order to define what to start monitoring?
What are the main network services used by the PXE protocol? (Choose TWO correct answers.)
A server requires a GRUB2 boot option which will always boot to runlevel 1. Which line of a GRUB2 configuration file starts the beginning of the settings needed to make this new choice available?
What is the functionality that PXE provides?
Which of the following commands displays the physical path of the kernel module named dummy?
What effect does the –f option to the update-rc.d command have on files in the /etc/rcX.d/ and /etc/init.d/ directories?
What information is found in the following excerpt from the file /proc/mdstat? (Choose two.)
Which command can be used to scan a specified network looking for IP addresses that appear to be in use?
The users of the local network complain that name resolution is not fast enough. Enter the command, without the path or any options, that shows the time taken to resolve a DNS query.
The following is an excerpt from the output of tcpdump -nli eth1 'udp':
13:03:17.277327 IP 192.168.123.5.1065 > 192.168.5.112.53: 43653+ A? lpi.org. (25)
13:03:17.598624 IP 192.168.5.112.53 > 192.168.123.5.1065: 43653 1/0/0 A 198.51.100.42 (41)
Which network service or protocol was used?
A regular user, joe, has just run:
./configure && make && make install
to build and install a program. However, the installation fails. What could be done to install the program? (Choose TWO correct answers.)
What does the -p3 option to the patch command do?
Which one of these directories should not be backed up?
Which of the following is a CD-ROM filesystem standard?
Which RAID level value must be used with Linux software RAID in order to create an array of mirrored devices?
What command will remove a physical volume from a volume group? (Specify ONLY the command without any path or parameters.)
Which command is used to create a ISO9660 filesystem? (Specify ONLY the command without any path or parameters.)
Which directory in /dev/disk/ can be used to determine the UUID of a connected hard disk?
Which of the following is a CD-ROM filesystem standard?