Elance Red Hat Linux Test Answers
·
If you are logged in to a regular user account, and it is necessary for you to log in as root and become a superuser, you use:
chown
passwd
chpriv
su
what will the following command do? "rpm -ql nagios"
Provide additional info on package nagios.
Verify the package nagios.
Install the package nagios.
list
files in package nagios.
To copy the system log to the current directory, you do:
copy /var/log/messages
copy /var/log/messages .
cp
/var/log/messages .
cp /var/log/messages
User-encrypted passwords are stored in the file:
/home/passwd
/etc/profile
/etc/masterpwd
/etc/shadow
/etc/encpasswd
The pwd command will:
display the encrypted user's password
display
the full path of the current working directory
display the name of the current or permanent default printer
display the decrypted user password (only the user and root can execute
this command)
The main configuration file that GRUB reads when it is loaded, is:
/boot/grub/grub.conf
/etc/boot.conf
/usr/bin/gboot.tab
/etc/boot
To edit your crontab file, you use:
crontab -i
crontab
-e
vicron
viedit
If you need to disable the ssh service at next boot, you use:
chkconfig
sshd off
chkconfig sshd on
chkconfig sshd ignore
chkconfig sshd noboot
To change the password for the root account, you use:
the
passwd command
the priv command
the redhat-config tool
the su command
How would you display all logical volumes?
show all logical vol
display-logic-vol
volume display all
display all logical vol
lvdisplay
What is the default FTP port number?
53
22
37
21
43
To list the most CPU-intensive processes on your system, you can use command:
iostat
free
par
top
Route accepts the following switches (options):
(i.e., no option is specified)
add
del
all
are correct
Which (free) linux distro is derived from RHEL
CentOS
Ubuntu
Mint
Debian
The default highest runlevel is:
12
6
2
4
To count words or lines in a file, you use the command:
tr
cc
wc
count
The default RHEL window manager is...?
KDE
XFCE
Gnome
TWM
To select the level of firewall protection, you make changes in:
/etc/sysconfig/authconfig
/etc/ysconfig/services
/etd/sysconfig/firewall
/etc/sysconfig/iptables
During boot init program checks default runlevel from the __________ file.
/proc/initconf
/etc/inittab
/etc/initconf
/proc/inittab
What is the most correct way to edit the current users crontab?
crontab -l
crontab
-e
vi /etc/crontab.conf
vi /etc/cron.d/0hourly
If you are in runlevel 5, and you want to change to runlevel 3, you issue the command:
init
3
chkconfig 3
runlevel 3
who -r 3
What is the standard directory for temporary mount points or mounts for removable media(e.g. CD-ROM)
/dev
/mount
/
/mnt
/temp
Route:
modifies entries in the routing tables of rpcd
modifies
entries in the routing tables of routed
modifies entries in the routing tables of dnsd
modifies entries in the routing tables of nfsd
If you use multiple crontab files, the directory containing them is:
/etc/cron.d
/etc/cron.monthly
/etc/rc.d/cron
/etc/cron
System logs for tasks performed on your system are maintained in the directory:
/var/log
/etc/syslog
/etc/syslog.conf
/usr/sbin/syslog
To open a remote ssh shell with the account test_account on the host test_host, you use the command:
ssh
test_account@test_host
ssh test_account test_host
sshd test_account@test_host
sshd -l test_account test_host
Which is not a valid priority in syslogd.conf?
news
debug
notice
alert
"shutdown -r now" will:
Requests
that the system be rebooted after it has been brought down in a safe way
Requests that the system be halted after it has been brought down
Requests that the system be powered off after it has been brought down
in a safe way
Only send out the warning messages and disable logins, do not actually
bring the system down
The runlevel that halts the system is:
0
1
6
h
To configure networking via a console GUI you can use:
system-config-network
networking config
system-config
network-config
A normal user sends a print job to the default printer but later finds the print queue is big and decides to cancel the job. What would the user do to perform this task?
The user can know the job number but cannot remove the job as he has no
permission to use the Iprm command.
The user has no permission to view job numbers using the Ipq command and
hence cannot delete the job.
The user has no permission to view job numbers using the jobs command
and hence cannot delete the job.
The
user has to list the job using Ipq and remove it using the command Iprm with
the job number as the argument.
What command generates a DSA ssh key?
gen-sshkey -t DSA
ssh-keygen
-t dsa
ssh-genkey -t dsa
ssh-key --type DSA
How to show currently loaded kernel modules?
lsmod
lsmodules
kernshow
modshow
modprobe
What is the default port for squid:
5656
3128
4646
4444
5555
How would you create a disk dump in RedHat Linux?
dump /dev/sda ssh@localhost:/dev/hda
fsck2 /dev/sda /dev/sdb
dd
if=/dev/sda of=/dev/sdb
mk4ext /dev/sda /dev/sdb
restore /dev/sda /dev/sdb
To find the version of redhat in use you can:
uname -a
none will work
cat
/etc/redhat-release
either will work
Runlevel 6 is the:
state when the system is a fully operational Linux system, with
multiuser support and remote file sharing access
power-down state and is invoked by the halt command to shut down the
system
reboot
state - it shuts down the system and reboots
single-user state, which allows access only to the superuser, and does
not run any network services
Which statements are true about a source RPM?
Source RPM does not contain information about how to install the
software.
Source RPM cannot be used to build a binary rpm.
Source
RPMs can be compiled and installed directly.
How would you check the RedHat OS version?
cat /etc/version
cat /etc/kernel-version
uname -a
cat
/etc/redhat-release
cat /etc/redhat-version
what does the following command do? "watch -n 1 du -hs /tmp/file"
all of the above
none of the above
It
runs the command du -hs /tmp/file every second and updates the output
waits till the file /tmp/file gets created befor checking the size
The following filesystem uses journaling:
vfat
ext3
all are correct
ext2
What does the "tcpdump" command do?
Terminates all TCP connections on the target host.
Captures
traffic on a network
Lists All TCP and UDP connections.
Lists All TCP connections.
Using cat command, which option is used to print the line number?
cat -A filename
cat -l filename
cat
-n filename
cat -number filename
cat count number filename
What is pNFS means?
peripheral Network File System
Parallel
Network File System
If you set your /etc/inittab file to have the default init entry to be 'init:3:default:', then your system default runlevel is:
administrative single-user mode; denies other users access to the
system, but allows root access to the entire multiuser file system. Startup
scripts are not run
full
multiuser mode with login to command-line interface; allows remote file sharing
with other systems on your network. Also referred to as the text mode state
full multiuser mode that starts up in an X session, initiating a
graphical login; allows remote file sharing with other systems on your network
multiuser, without networking (i.e., you don't have access to network
services like NFS, xinetd, and NIS)
/proc:
Can be used for obtaining information about processes and devices
Some of the files within /proc/ can be manipulated by users and
applications to communicate configuration changes to the kernel
Is a pseudo-file system
All
are correct
Using scp to copy a file "test_file" from your machine to the remote machine "test_machine" to the /tmp directory, using the account "test_user" on the remote machine, you do:
scp
test_file test_user@test_machine:/tmp
scp -f test_file -u test_user -m test_machine -d /tmp
scp test_file test_machine@test_user:/tmp
scp test_file:test_user@test_machine:/tmp
The following entry appears in the /etc/crontab as follows: 30 4 * * 1 /bin/sh /home/Tom/rmcore 2>&1 /dev/null
"rmcore" will execute on April 30th for one hour
"rmcore" will execute on the first day of every month
"rmcore"
will execute every Monday at 4:30 a.m.
To verify what state (run level) you are currently running in, you use:
runlevel
chkstate
init
telinit
You use samba to:
none are correct
mount Windows filesystems on Linux machines
share resources (like printers) between a Windows and Linux machines
both
are correct
From Which Version of RHEL was the pNFS introduced ?
RHEL
6.4
RHEL 6
How would you find out the dependencies of RPM package?
#rpm -ivh
#rpm -UVH
#rpm -nogpg
#rpm -icv
#rpm
-qR
Larry, working as root, needs to change the ownership of the file "myfile" from "james" to "mary." He should:
chown
mary myfile
chown james:mary myfile
changeowner mary myfile
chown myfile james:mary
For partitioning disks, you use:
both
are correct
parted
none are correct
fdisk
How to find out memory usage:
free -m
top
All
are correct
vmstat
cat /proc/meminfo
'xhost +' is a security problem because:
any
user with access to the system could connect to your X display
any host on the network could assume your IP system address
this command does not pose any security risks
any user on remote machines could open a remote connection to your
system with rsh or ssh
What is the tee command?
send errors to a file
translate characters in a file
split
standard output to a file
create marks on a file
When you first add a user to the system, you must provide the user with a bare-bones version of their login, shell, and logout initialization files. The default initialization files are kept in:
/etc/shells
/etc/gshadow
/usr/sbin/passwd
/etc/skel
How would you find out the date and time of rpm installation?
# rpm -all
# rpm -Uvh
#
rpm -qi
# rpm -la
# rpm -ivh
Where do the manual (man) pages for all commands reside in the File System Hierarchy (FSH)?
/usr/share/info/man
/usr/share/man
/usr/man/share/locale
/usr/share/locale/man
When creating a new user account, unless otherwise specified, the files from the __________ are automatically copied to the home directory.
/etc/user start
/etc/skel
/etc/default
/usr/skel
which command is used to see aging of password?
chown
passwd
chmod
chgrp
chage
Which Standard does pNFS Stands for..
NFS 3
NFS
4.1
NFS 4
To power down the system, you use:
all
are correct
telinit 0
shutdown -h now
shutdown -h +1
After extending LVM logical volume that has file system what should be done to extend file system?
resize2fs
/dev/lvm_volume
lvextend /dev/lvm_volume
extend /dev/lvm_volume
lventend -L /dev/lvm_volume
mk4ext /dev/lvm_volume
Files located at "/etc/rc.d/rc<x>.d/" directories(where <x> is the number of the runlevel) are:
sockets
hard links
scripts
symbolic
links
To display IP routing table you can use:
ip route list
route
netstat -r
ip route show
All
variants are correct
What is the permission of /etc/shadow?
644
640
400
660
665
To check the list of shells installed on the system, you look in:
/etc/services
/etc/profile
/etc/shells
/etc/shell
/etc/conf
You configure an OpenSSH server in the file:
/etc/ssh/sshd_config
/etc/sshd_config
/etc/sshd/sshd.config
/etc/ssh/sshd.conf
To disable SSH root login you should:
Set "PermitRootLogin=No" in /etc/ssh/sshd.conf
Set "PermitRootLogin no" in /etc/ssh/sshd.conf
Set "AllowRootLogin=No" in /etc/ssh/sshd_config
Set
"PermitRootLogin no" in /etc/ssh/sshd_config
The __________ program can add password for a group. It is used to administer /etc/group, and /etc/gshadow.
grpasswd
chgrp
passwdgr
gpasswd
chgrpwd
What is the purpose of the file /etc/updatedb.conf?
configuration
file for mlocate package
configuration file for driver updates
configuration file for software updates
configuration file for kudzu
The user smith issued the egrep "^[[: upper:]]" words.txt command. What does this command do?
displays
all lines in the words.txt file that begins with an uppercase letter
displays all lines in the words.txt file after translating uppercase
letters to lowercase
displays all lines in the words.txt file after translating lowercase
letters to uppercase
displays all lines in the words.txt file that contains an uppercase letter
Identify the true statement about configure script.
It depends on make to create the Makefiles.
It
creates the necessary Makefiles based on the user information.
It does not depend on the autoconf tool for the package installation.
It creates the required directories and subdirectories on the system.
The command to check your current runlevel is:
none are correct
both
are correct
runlevel
who -r
If umask is 0022, what is the by default permission of a file?
655
777
644
755
744
How to list users that are logged on?
who
w
users
All
answers
For all filesystems listed in /etc/mtab, to display the total space allowed for a user or group, you use the command:
usage
du
df
quota
If you want to set a samba share as read/write, you set it with the following in /etc/samba/smb.conf:
readwrite = yes
writeable
= yes
read = yes ; write = yes
rw = yes
What is the default I/O scheduler elevator?
noop
as
cfq
deadline
Which of the following are valid iptable chains?
Through, In, Out
None of the above
Accept, Drop, Reject
All of the above
Forward,
Input, Output
Which command is used to kill a process gracefully?
pkill -9 <PID>
kill -9 <PID>
pkill -G graceful <PID>
kill -g <PID>
kill
-15 <PID>
In a file delimited by commas, what command will print the 3rd column of data:
awk -f, '{print $2}'
awk '{print $3}'
awk -f, '{print $3}'
awk
-F, '{print $3}'
Scripts within a cron directory are run:
by size
in
alphabetical order
according to creation date
in no particular order
Which of the following options is true of the entry below? /dev/cdrom /cd iso9660 ro,user,noauto 0 0
This
is an "fstab" entry which lets any user mount the CD-ROM.
This is an "mtab" entry which mounts a CD-ROM as a read-only
device at boot time.
This is an "fstab" entry which mounts a CD-ROM as a read-only
device at boot time.
If your /etc/inittab file becomes corrupted, to start up your system, bypassing the inittab file, so you could edit the file to fix it; you can reboot and enter the following command at the boot prompt:
linux
single
linux -S
linux -s
init -s
What command will free the page cache?
echo 2 > /proc/sys/vm/drop_caches
echo
1 > /proc/sys/vm/drop_caches
echo 0 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/mem/drop_caches
You use the SUSPEND character to suspend an already running process. Which signal does it send to the process?
SIGSTOP
SIGTERM
SIGHUP
SIGINT
When mounting a volume listed in "fstab",
both the device and mount point must be given on the command line.
it
suffices to give only the mount point
Which service lets you edit qcow2 images in Linux ?
both virsh & virt-manager
virsh
none of them
virt-manager
guestfish
System-wide values used by user and group creation utilities such as useradd and usergroup are kept in the file:
/etc/login.defs
/etc/user.def
/etc/usergrp
/sbin/passwd.defs
Which statement is true about the files and directories created inside the /project directory that have 2777 permissions?
All executables inside the /project directory will run with the
effective group ID (EGID) of the group of the /project directory.
All
files and directories will have the same group as that of the /project
directory.
All files inside the /project directory will have permissions set to
2644 and the subdirectories will have them set to 2755.
All files and directories will have the default group set to the primary
group of the user who creates them in /project directory.
How to find out what packages are currently installed?
rpm -a
yum info --installed
rpm -q
yum
list installed
yum list --installed
What file is used for 'HOSTNAME' configuration?
/etc/sysconfig/network
/etc/resolv.conf
/etc/sysconfig/networking
/etc/hosts
/etc/hostname
What is the default maximum number of open files a user can have by default?
1024
2048
unlimited
4096
8192
The /projects directory is being shared by server1 with the share name datashare through samba. To access the shared directory as bob you issue the following command: smbclient //server1/datashare -U 'bob%foouser' What happens when you execute the command?
All the samba shares on server1 will be displayed.
bob will be prompted for a password to access the share.
All the shares on server1 accessible to bob will be displayed.
The
share will be accessed with the credentials of bob without being prompted for a
password.
Which mode provides load balancing and fault tolerance in ethernet bonding ?
balance-alb
802.3ad
balance-tlb
balance-xor
Round
Robin
The line '0 2 * * 1-5 tar cf /home/backp /home/projects' in a crontab will:
back
up the projects directory at 2:00 A.M. every weekday
back up the projects directory at 2:00 A.M. from Sunday to Thursday
back up the projects directory at 2:00 P.M. from Sunday to Thursday
back up the projects directory at 2:00 P.M. every weekday
Which kernel parameter is used to reset root password in RHEL7
one
1
both 1 & single
rd.break
single
To change the system runlevels, you use:
setinit
telinit
initd
runlevel
How to kill user session?
pkill
-9 -u username
kill -9 -u username
pskill username
kill username
If you use 'shutdown now', it will:
reboot the system
print a warning to all active terminals and then halt the system
shut down the system
transfer
your system into maintenance mode
What file will show you with what options kernel was started?
/boot/kern_start
/proc/cmdline
/proc/start
/var/log/messages
To have 'grep' match only whole lines, you use:
grep -L
grep -l
grep
-x
grep -E
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