Linux+

Front 1

UGO

Back 1

User, Group, Others

Front 2

bash -r

Back 2

if the -r option is present, the shell becomes restricted

Front 3

e2fsck with code of 4

Back 3

File system errors were detected but not corrected.

Front 4

e2fsck
-f
-p
-y
-n
-v

Back 4

e2fsck - check a Linux ext2/ext3 file system
Synopsis

f: force checking
p: repairs bad blocks w/o requiring user interaction
y: answers yes to all queries
n: answers no to all queries
v: displays verbose output

Front 5

mkfs.xfs -d agcount=4 -l size=32m /dev/hdc9

Back 5

command will create an optimized FS with the given specifications.

Front 6

mkfs

Back 6

mkfs creates most FS

Front 7

etc/security/limits.conf

Back 7

configuration file for the Pluggable Authentication Module (PAM) named pam_limits.

File configured to impose limits on the system usage by the users.

Front 8

/etc/printcap

Back 8

file contains information regarding every local or remote printer connected to a linux system.

Front 9

tar -zcvf sample.tar /home/user/sampledirectory

Back 9

command will compress the contents of the /home/user/sampledirectory directory using the gzip utility

z: causes tar to use gzip to compress the archive while the archive is being created and to decompress the archive when extracting files from it.

Front 10

Set Group ID (SGID)

Back 10

if the "s" permission is in place of the group's executable bit the file is SGID and will be executed with the permissions of the HR group.

i.e. -rwxr-sr--

Front 11

sudo mount -t xfs /mnt

Back 11

command will mount an XFS on the /mnt directory. The user will be prompted for a password.

-t: The argument following the -t is used to indicate the file system type.

Front 12

Advanced Encryption Standard (AES)

Back 12

a symmetric key algorithm that ciphers a block length of 128 bits using a key length of 128, 192, or 256 bits. AES is reversible.

Front 13

route

Back 13

the route command is used to modify the IP routing tables managed by the kernel by using the --add parameter to add a new route and the --del parameter to delete an existing route. The -gw parameter is used to specify a gateway. There is no -network command.

Front 14

rpm -qc --dump

Back 14

command will display information regarding the configuration files stored in a package.

--dump: dump the information as follows

q: query

c: List only configuration files

Front 15

This file is used to provide access control information to the LPRng Printer spooling. It can also be edited to manipulate the access control to the printer permissions on the LAN.

Back 15

The /etc/lpd.perms

Front 16

This file contains characteristics of the known file systems. File also contains a list of the file systems and their characteristics that can be currently mounted on the system if all the supported modules have been loaded

Back 16

/etc/filesystems

Front 17

For what can the httpd.conf file not be edited?

Back 17

adding mime types for different files on the server. The httpd.conf file cannot be edited for adding mime types for different files on the server.

Front 18

Which command can be used to issue several Linux commands in succession w/o exiting the Vi editor?

Back 18

The ':sh' command will create a sub-shell from which a user can issue multiple commands w/o exiting the current file.

Front 19

Which file should you edit to create a list of sendmail e-mail aliases?

Back 19

The etc/aliases file should be edited to create a list of e-mail aliases for the sendmail program.

Front 20

Which parameter should be used with the 'find' command to find and display all the files that have the read, write, and execute permissions for the owner (user) of the file?

Back 20

the '-type f -perm -o+rwx ls' parameter can be used with the 'find' command to find and display all the files that have the read, write, and execute permissions for the owner of the file.

file f: file is of type 'regular file'.

ex. find -type f -perm -o+rwx ls

Front 21

Which parameter of the 'mkinitrd' command preloads a SCSI module named module.o and overwrites any existing image files?

Back 21

-f --with=module.o

ex.
mkinitrd -f --with=module.o
Parameter should be used with 'mkinitrd' command to preload the SCSI module named module.o and to overwrite any existing image files.

-f: Allows mkinitrd to overwrite an existing image file.

Front 22

Which entry needs to be entered in the etc/fstab file to remount the /var partition with the suid and sgid permissions disabled?

Back 22

mount /var -o remount,nosuid

/etc/fstab is a list of the filesystem (table) that will be read at boot time.

Front 23

[Lineprinter]
path = /var/spool/lpd/lp
read only = yes
printable = yes
print command = lpr -r -h -P %p %s

Which line is required to be added to the file to allow clients to send print jobs to this printer?

Back 23

writeable = yes

Front 24

Which file contains information regarding every printer connected to a Linux system?

Back 24

printcap

The etc/printcap file contains information regarding every local or remote printer connected to a Linux system

Front 25

Which is not a valid parameter to be used with the 'route' command?

Back 25

The '-network' parameter cannot be used with the 'route' command. To specify a target network, the '-net' parameter should be used with the 'route' command.

Front 26

A system administrator wants to view information regarding the configuration files stored in a package, ipvsadm. Which command will display the given information?

Back 26

rpm -qc --dump ipvsdadm

This command will display information regarding the configuration files stored in the package ipvsadm.

Front 27

Which Apache directive is used to specify the type and severity of errors encountered by the Apache server?

Back 27

LogLevel

the LogLevel directive is used to set the type and severity of errors encountered by the Apache server.

Front 28

Which command should you issue to view a list of environment variables configured in a BASH shell?

Back 28

'env'

This command should be issued to display a list of environment variables in a BASH shell running on a Linux system.

Front 29

Which directory would most likely be on a separate partition?

Back 29

/usr/local

Because all the locally installed software and other files are placed in the /usr/local directory.

/usr directory contains the user commands and administrative commands with sub directory.

Front 30

test

Back 30

test

Front 31

IRQ 0

Back 31

system timer

Front 32

IRQ 1

Back 32

Keyboard

Front 33

IRQ 3

Back 33

Second serial port (COM2)

Front 34

IRQ 4

Back 34

First serial port (COM1)

Front 35

IRQ 5

Back 35

Sound card

Front 36

IRQ 6

Back 36

floppy disk controller

Front 37

IRQ 7

Back 37

First parallel port

Front 38

IRQ 8

Back 38

real-time clock

Front 39

IRQ 12

Back 39

PS/2 mouse

Front 40

IRQ 13

Back 40

floating point unit/coprocessor

Front 41

IRQ 14

Back 41

Primary IDE

Front 42

IRQ 15

Back 42

Secondary IDE

Front 43

A user named Alex issues the "sudo mount -t xfs /mnt" command to mount an XFS on the /mnt directory. What will be the result of issuing the command?

Back 43

Alex will be prompted for his password.

Front 44

Which configuration file should be edited to limit memory usage for the users of a system?

Back 44

/etc/security/limits.conf

Front 45

What will be the screen output of the ps -t tty3d command?

Back 45

The command will display the processes executed from the tty3d terminal.

Front 46

What is the function of the man -k passwd command?

Back 46

to view the command names and help file descriptions containing the word passwd.

k: Equivalent to apropos

Front 47

Which command can a root user use to issue a specific command repeatedly?

Back 47

watch

Front 48

DMA 2

Back 48

floppy drive controller

Front 49

A user wants a script named test1 to use the contents of the test2 file as input and redirect the output to the test3 file. How can the user accomplish this?

Back 49

test1<test2 | test3

Front 50

What is not a true statement regarding the AES encryption algorithm?

Back 50

AES is an asymmetrical key encryption algoritm.

Front 51

Which system file stores the kernel configuration options?

Back 51

/usr/src/linux/.config

/usr/src: contains the kernel source code.

/usr/src/linux: directory points to a directory that the kernel resides (symbolic link).

Front 52

What is the mandatory section in the XFree86 configuration file?

Back 52

The device section

Front 53

A Linux administrator wants to restrict root user access on the /nfs exported directory. Which parameter in the /etc/exports file will ensure that everything under the /nfs exported directory is inaccessible to the root user?

Back 53

noaccess

The /etc/exports file controls which file systems are exported to remote hosts and specifies options.

Front 54

Which directory is not an important directory that should be mounted on a partition seperate from the root file system?

Back 54

/home/username

Front 55

Which type code will you set on a partition to make it a swap partition?

Back 55

0x82

Front 56

What will the bzip2 -d myfile1.txt.bz2 command do?

Back 56

Uncompress the myfile1.txt.bz2 file, and delete the original file.

Front 57

Which command should be issued to take an incremental backup of the /usr/home directory on a SCSI tape?

Back 57

dump -1uf /dev/st0 /usr/home

dump: ext2/3 filesystem backup

Front 58

Which line should you add in the /etc/fstab file to allow a non-root user to mount DOS-formatted floppy disks on /dev/fd0?

Back 58

/dev/fd0 /mnt msdos user,noauto

Front 59

Which command or file can be used to initialize a RAID device array?

Back 59

/sbin/mkraid

Front 60

Which utility can be used to view the manual pages for the cd command?

Back 60

help

cd help or cd -h

Front 61

Which command will enable a system administrator to view a list of all the process IDs that are using a file named rootfile?

Back 61

fuser rootfile

Front 62

What is a reason for editing the /etc/sudoers file?

Back 62

Listing the users who have been temporarily granted the super user privileges.

Front 63

Which option cannot be used with the /etc/init.d/cups command?

Back 63

exit

Front 64

A user wants to take a full backup of the root directory. Which backup utility should not be used?

Back 64

The gzip utility is not a backup utility, but a program to compress files/directories.

Front 65

Which configuration is used to store the instructions to mount a Samba FS at boot time?

Back 65

/etc/fstab

Front 66

For what can the /etc/ssh/sshd_config file not be configured?

Back 66

configuring the number of allowed attempts for entering a login password.

Front 67

A system administrator wants to terminate all the processes accessing terminal session /dev/tty5. Which command will enable the system administrator to achieve the desired result?

Back 67

fuser - identify processes using files or sockets

fuser -k /dev/tty5

Front 68

Which cryptographic algorithm does not use the Cipher Block Chaining technique during encryption?

Back 68

ARCfour

Front 69

What is not a PCMCIA dependency module?

Back 69

Tulip

Front 70

A Linux user issues the su -c rm -rf /sampledirectory/* command. What will be the outcome of the command?

Back 70

Without being prompted for a password, the user will issue the rm -rf /sampledirectory/* command as a super user and then log out to the previous login identity

-c: pass a single command to the shell.

Front 71

Which hexadecimal code is used for the Linux native file system?

Back 71

83

Front 72

Which cryptographic algorithm is not supported by SSH?

Back 72

Tulip

Front 73

Which command line based setup program is used for the X Windows System?

Back 73

XF86Config

Front 74

What is the partition number for the Linux extended partition?

Back 74

85

Front 75

Which service would you restart after enabling POP3 on a RH 6.3 computer?

Back 75

inetd

Front 76

Which files system directory provides an alternate method for modifying the IP forward kernel parameter using the sysctl command?

Back 76

/proc/sys

Front 77

tar -zcvf

Back 77

tar: (tape archive) can create, add to, list, and retrieve files from an archive.

c: takes the file given on the command line and stores the named files in a new archive. Will destroy an existing archive before creating the new one.

v: lists each file as tar reads it or writes it.

f: uses filename as the name of the file/device to hold the archive.

Front 78

gzip

Back 78

Compresses or decompresses file. When gzip compresses a file, it adds the extension .gz. For example, compressing the file fname creates the file fname.gz and deletes the original file. 'gunzip' restores gzip files.

Front 79

bzip2

Back 79

bzip2 compresses files using the Burrows-Wheeler block sorting text compression algorithm, and Huffman coding.

Front 80

To view the help screen for the 'info' command?

Back 80

info ?

Front 81

Which utility can be used to view the manual pages for the 'cd' command?

Back 81

cd help

Front 82

NIS

Back 82

Network Information Server - provides a simple network lookup service consisting of databases and processes. Its purpose is to provide information, that has to be known throughout the network, to all machines on the network. Information likely to be distributed by NIS is:

login names/passwords/home directories (/etc/passwd)

group information (/etc/group)

host names and IP # (/etc/hosts)

Front 83

chmod, suid, sgid and sticky bit

Back 83

While normally used with a 3-digit octal number, chmod expects a 4-digit number. The leading digit is used to set the suid bit (4), sgid bit (2), or sticky bit (1). It is assumed to be zero if only three digits are used.

This file has the suid bit set, read and execute permissions for group members, and read-only permissions for everyone else so the correct octal representation is 4754.

Front 84

Xinetd should be configured to handle requests for which of the following daemons?

Back 84

telnet
imap
tftpd


Xinetd is used to spawn services to handle network connections on well known TCP and UDP ports.

Front 85

testparm

Back 85

testparm is a very simple test program to check a smbd configuration file for internal correctness.

Front 86

Which command will insert the system date in file without exiting the Vi editor?

Back 86

r !date

Front 87

resolve.conf

Back 87

stores the IP addresses of name servers.

Front 88

What information does the /proc directory contain?

Back 88

Contains advanced configuration and power interface (ACPI) power management dynamic information.

Front 89

What is the named.conf file?

Back 89

The configuration for the DNS daemon (named.conf).

Resolv.conf is the configuration file for the DNS resolver.

Front 90

What does 25G in vi editor do?

Back 90

Takes the user to the 25th line.

Front 91

Where is LILO installed?

Back 91

In the MBR.

Front 92

A user has installed and configured an internal modem to connect the workstation to the Internet.
The user claims that the modem is not connecting properly. What diagnostic tool can be used to test the modem?

Back 92

minicom

minicom - friendly serial communication program.

Front 93

Which command will verify that an NIS client is bound to an NIS server?

Back 93

ypwhich

Front 94

A Linux system seems to be unstable, with several services unresponsive. Before rebooting, which
of the following commands could be entered to help ensure the system restarts into a stable state?

Back 94

fsck

Front 95

A customer reports that his server will not allow users to retrieve their email through POP3 or connect to the server via telnet. What service needs to be restarted?

Back 95

inetd

Front 96

Configuring host.deny and hosts.allow will protect the server from intruders that attempt which if the following?

Back 96

TCP Wrappers

Front 97

Which program to add and remove modules from the Linux Kernel

Back 97

modprobe

Front 98

What correctly formats a 3.5" floppy disk?

Back 98

mkfs /dev/fd0

Front 99

head command

Back 99

displays the top of a file by 10 lines by default.

Front 100

swapon -a

Back 100

Will make the specified device available for swapping and paging.

Front 101

Where can the HCL be found?

Back 101

At the Linux Vendor's website.

Front 102

When queried, which file will specify the order in which to resolve a domain name?

Back 102

The /etc/nsswitch.conf file is used to specify the method to resolve a domain name. Linux uses a resolver library to obtain the IP address corresponding to a host name.

example of domain name resolution entry:

hosts: files dns

first check /etc/hosts and then /etc/resolv.conf.

Front 103

tune2fs

Back 103

command adds a journal to an existing ext2 file system without altering the data present on the partition.

ex. tune2fs -j <device>

Front 104

samba

Back 104

/etc/fstab

Front 105

lpr -Ptempora -m susan resume.doc

Back 105

Command will print the document named resume.doc

Front 106

mke2fs -j /dev/hda9

Back 106

Command creates a Linux ext3 FS on the /dev/hda9 device.

Front 107

e2fsck

Back 107

The e2fsck command is a system administration command that is used to check ext2/ext3 file systems for bad blocks.

Front 108

The cron utility uses the following format to schedule commands

Back 108

minute, hour, day, month, weekday, command.

ex.

To schedule a script to run every night at 1a.m.

01*** /usr/maintscripts/myscripts

Front 109

join

Back 109

command creates a string by joining together list elements.

Front 110

quotaon

Back 110

command turns filesystem quotas on or off.

ex.

/sbin/quotaon

Front 111

What command would you use to make a partial restore from device (tape) /dev/nst1?

Back 111

restore -if /dev/nst1

Front 112

ps command

Back 112

the -e switch is identical to -A.

-e: everything
-A: all

Front 113

cron and crontab

Back 113

crontab is used to maintain files for individual users.

cron is the daemon to execute scheduled commands.

Front 114

How would you force user1's password to expire every 30 days?

Back 114

chage -M 30 user1

Front 115

nice

Back 115

Runs a program with modified scheduling priority.

Front 116

How do you force a process to reread?

Back 116

kill -1 will cause a process to reread a configuration file.

-9 will immediately kill a process

-15 will close a process after it has been cleaned up

Front 117

mt command

Back 117

Command controls magnetic tape drive operation.

Front 118

nl command

Back 118

Command will number lines of a file.

Front 119

umask

Back 119

Command sets file mode creation.

ie.

default 0777

umask 222

leaves umask setting at 555

Front 120

netconfig

Back 120

A text based tool for simple configuration of ethernet devices.

Front 121

runlevel 6

Back 121

The run level for reboot.

Front 122

tar -tzf

Back 122

The -tzf switch is used to test a zip file. Used to check the contents of a tar file.

Front 123

df

Back 123

reports file system disk usage.

-k option shows it in kilobytes.

Front 124

grep

Back 124

Print lines matching pattern.

-i:ignore case
-f:obtain pattern from file.

Front 125

setgid

Back 125

set group identity

Front 126

free

Back 126

command displays the amount of free and used memory in the system.

Front 127

sed command is stream editor for filtering and transforming text.

Back 127

the s switch can be used to replace characters or groups of characters. the g switch tells the script to work globally.

Front 128

How many devices are supported by USB?

Back 128

The USB standard supports up to 127 devices with more to come.

Front 129

tar -xzf

Back 129

-xzf switch will extract a zip file.

Front 130

cut command

Back 130

removes sections from each line of a file.

Front 131

lpc

Back 131

Line printer control program. Can be used to restart a printer queue.

Front 132

tee command

Back 132

The tee command is used to send output to both the screen and to a file.

Front 133

You want to change the user who will receive the output from cron jobs. You want the output to go to user1.

Back 133

specify MAILTO=user1 at the top of the crontab.

Front 134

grep -f

Back 134

obtains patterns from a file.

Front 135

kill command

Back 135

-HUP: will cause a process to reread the configuration file

-TERM will close a process after it has been cleaned up

Front 136

Ultra-Wide SCSI

Back 136

Has a 16 bit bus.

Front 137

Default priority processes start with?

Back 137

zero (0)

Front 138

The standard output reference number is?

Back 138

one

Front 139

What is the run level for a system reboot?

Back 139

six

Front 140

Standard error is referenced by what number?

Back 140

two

Front 141

sar command

Back 141

Collect, report, or save system activity information.

Front 142

mkswap command

Back 142

Sets up a Linux swap area.

Front 143

The /etc/exports file

Back 143

File used for handling the Network File Server (NFS) configuration.