Rhce Question and Answer

7/22/2019 Rhce Question and Answer

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If you want to abuse complaints, please go to Baidu library Complaint Center ; like to ask aquestion or comment feature suggestions, please click here for feedback.R H C E 6 exam test questions library and A. Case ( 2 0 1 3 . 1 2 months most newamendment changed version )(4 Evaluation) | 381 people read | 67 times Download |Report DocumentsFor the former there 's into line the wrong error repair changed , added plus of a few simplesingle- note interpretation , parties will manage solution

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RHCSAOfficially doneRHCSAAgo, includes 1In accordance with the requirements of the subject, to enter single-user mode to modifyroot

Password1) Press any key to boot2) Press e3) Then select the kernel Press e

4) Tail added 1, Enter5) Press b Into single-user mode6) Use runlevel View is running in single-user mode7) Use getenforece View status

8) Use setenforce 0 Instead permission Mode9) passwd Change Password

10)

exitExit without restart

2,

Configure the network information

1)

Will

/ Etc / init.d / NetworkManager stopThis service is disabled

2)

chkconfig NetworkManager offTurn off power automatically start

3)

iptables


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-FEmpty firewall

4)

service iptables saveAfter the firewall modifications must be saved

5)

setupModify network information, selectNetwork configuration6)

SelectDNS configurationModifyhostname

And the mainDNS7)

SelectDevice configurationModifyeth0Ofip,

netmask,GWLordDNS8)

service network restart

After the restart modify network information card

9)

ping host.domain90.example.comTesting canpingThrough

10)


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host host.domain90.example.comTestDNSCan resolved

3,

Additional Information

1)

System is based onDNSDomaindomain90.example.com

Membership runs.InDNSDomain

domain90.example.comAll systems areIs part of172.24.90.0/255.255.255.0This subnet, the subnet belong to this domain

2)Hostname: station.domain90.example.com3)IP address: 172.24.90.104)Netmask: 255.255.255.05)

Gateway: 172.24.90.2546)

Name server: 172.24.90.2547)

Virtual system usedroot

The password isnimsdreg4

,

Examination by

ssh

[email protected]

-


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XConnected to the virtual systems do title

RHCSAExam

Use on a physical machine

[email protected]

-XConnect to a virtual machine, be doing title

1,

Configure your system to use the default source. A

YUMSource has been provided inhttp://server.domain90.example.com/pub/x86_64/Server,Configure your system

Use this address as the default source

Answer:

cd / etc / yum.repos.d /

#Open

vim aa.repo

#Createrepo

, The name of free


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name = aa

baseurl = http://server.domain90.example.com/pub/x86_64/Server

enabled = 1

gpgcheck = 0

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16

yum clean all

#Empty the cache

yum install system-config-lvm-y

#Installation Testing

yumSource, while the title for the next use

2,

Adjust the size of the logical volume.

Logical adjustmentvoSize,

It's the size of the file system should be290M.To ensure that the contents of the file system is still intact.NOTE: Partition rarely precise requirements to the same size, so the range

260MTo320M


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Between acceptable.

Answer:

system-config-lvm

#Into graphical modifications

Select the logical view---

Select Edit Properties

3,

Create a user account. Create the following users, groups and group memberships:

a)

Name ofsharegrpThe group

b)

UsernatashaUsesharegrpAs a subsidiary of the group

c)

UserharryAlso usedsharegrpAs a subsidiary of the group

d)


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Usersarah, Can not access the system can interactshellAnd notsharegrpMembernatasha,

harry,sarahPasswords arenimsdregAnswer:

groupadd sharegrp

#Add Group

useradd-G sharegrp natasha

#To

natashaAdd to subsidiariessharegrpGroup

useradd-

G sharegrp harry

#ToharryAdd to subsidiariessharegrp

Group


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useradd-s / sbin / nologin sarah

#Add users, and setshell

passwd natasha

#Set Password

passwd harry

passwd sarah

4,

Configuration/ Var / tmp / fstabPermission. Copy the file/ Etc / fstabTo/ Var / tmp / fstab

. Configuration/ Var / tmp / fstabPermissions are as follows:

a)

File/ Var / tmp / fstab

The owner isrootb)

File/ Var / tmp / fstabBelongroot

Group


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3/

16

c)

File/ Var / tmp / fstab

Can not be executed by any user

d)

UsernatashaReadable and writable

/ Var / tmp / fstabe)

User

harryNeither read nor write/ Var / tmp / fstabf)

All other users (present and future) has read/ Var / tmp / fstabAbility

Answer:

Use access control lists

setfacl-m u: natasha: rw-/ var / tmp / fstabsetfacl-m u: harry: --- / var / tmp / fstab

5,

ConfigurationcronTasks. Usernatasha

You must configure acron job, Local daily


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14:23Run,

Execution:* / Bin / echo hiyaAnswer:

crontab-

e-u natasha23 14 *** / bin / echo hiya

#

Use "i"Insert editing, use the": X

"Finished editing

crontab-l-u natasha

#Verification

6,

Create a shared directory. Create a collaborative directory/ Home / shared, So that it has the following characteristics:

a)

/ Home / sharedGroup belongs

sharegrpb)


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This directory for groupsharegrpThe members have readable, writable and executable, but not for any other user:(root

You can access the systemAll files and directories)

c)

In/ Home / sharedAny file belongs to the group created automatically set to the nextsharegrpAnswer:

mkdir / home / shared

#Create a directory

ls-ld / home / shared

#View the properties of the directory

chgrp sharegrp / home / shared

#Change belongs to the group of the directory

sharegrpchmod g+ w / home / shared

#To the directory group, increasedwCompetence

chmod o-rx / home / shared


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#The other deletedrxCompetence

chmod g+ s / home / shared

#

Implemented in any file belongs to the group of the directory created automatically set tosharedgrp

7,

Installing the kernel update.

Fromftp://server.domain90.example.com/pub/updatesInstall the appropriate kernel update.The following requirements must be met:

a)

Updated kernel as the default kernel boot

b)

The original is still valid and bootable kernel at boot time

Answer:

yum install firefox-y

#Installation

firefoxkill -9 3816

#

During the installationyumProcess, appeared


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3816Lead to an unsuccessful installation process runs through the commandpid 3816The process is closed. If it still fails to install, you can try to restart the computer, but toensure that the subject has been saved before

firefox

#OpenfirefoxIn

firefoxThe subject of the address bar URL provided,Then open the page in two cores downloaded,Select Save Link As,

Save torootHome directory

rpm-ivh kernel-*

#

InrootHome directory under execution, upgrade the kernel, the command is to upgrade the kerneland the preservation of the originalNuclear

vim / boot / grub / grub.conf

#Check whether the kernel update, there are new kernel and the kernel on

uname-r


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#View the kernel's name

8,

Bind an external authentication service. System

host.domain90.example.comProvides aLDAPAuthentication service, your system should be based on the followingThe requirement to bind to this service:

a)

Authentication service benchmarkDNBe

dc = domain90,,dc = example,,dc = comAnnotation[Li1]:

This displays the currently running versionThis can be verified after the restart, etc.

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16

b)

LDAPUsed to provide account information and authentication information

c)

Located connection should be usedftp://host.domain90.example.com/pub/domain90.crtCertificate Encryption

Note: When properly configured,ldapuser90


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You can log on to your system, but no home directory

Until you completeautofsTopicldapuser90OfThe password is'

password'

Answer:

wgetftp://host.domain90.example.com/pub/domain90.crt

#Download the certificate, ifwget

Command is not installed, useyum install wgetInstallation

setup

#Use the dialog box operation

Select Authentication Configuration

Select the User InformationLDAP

And verification of informationLDAPFill in the server

ldap :/ / host.domain90.example.com

#URLs can be pasted directly, but must add agreement

Baseline information to fill


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dc = domain90, dc = example, dc = com

#You can paste directly from the subject of the request

Select the UseTLSDownload a copy of the completed certificate to the address of the pop-up prompt dialog box

id ldapuser90

#Check if the user exists

9,

ConfigurationNTP. Configure your system so that it isserver.domain90.example.comANTPClient

Answer:

system-config-data

#Use graphical interface settings

In the open interface

Select

The date and time synchronization on network

The originalNTPServer deletes (public network)


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Click

Add

Enterserver.domain90.example.com

10,

ConfigurationautofsAutomatically mountLDAP

The user's home directory, the following requirements:

a)

host.domain90.example.com (172.24.90.250)UseNFSShared/ NetdirTo your system. This file system contains pre-Set a good userldapuser90Home directory

b)

ldapuser90The home directory ishost.domain90.example.com :/ netdir/ldapuser90c)

ldapuser90The home directory should automatically mount to the local

/ NetdirThe following/ Netdir/ldapuser90

d)

Home directory must have write access to the user

e)

ldapuser90The password is


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'password'

Answer:

vim / etc / auto.master

/ -

/ Etc / auto.aa

#In/ Misc

Add this line belowIf it is written/ Netdir

/ Etc / auto.aa,Then the followingauto.aaWill be writtenldapuser90

cp / etc / auto.misc

/ Etc / auto.aa

#Copy

vim / etc / auto.aa

#Editor

/ Netdir/ldapuser90


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-fstype = nfs, rw host.domain90.example.com :/ netdir/ldapuser90

#IncdThe following join,IfRequirements set

autofsVersionvers = 3, ThenrwAfter inserting

vers = 3

service autofs restart

#RestartautofsService

su-

ldapuser90

#Validation switch toldapuser90

To see if a home directory

df-h


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#Verify to see if the mount successful

chkconfig autofs on

#Set boot

11,

ConfigurationFTPAccess. As

station.domain90.example.comImplementftpService that allowsanonymousFrom/ Var / ftp / pubDownload file

Answer:

Annotation[Li2]:Note the examination requirements

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16

yum install vsftpd

-y

#Installationftp


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Service

service vsftpd start

#Start the service

chkconfig vsftpd on

#

Set boot

touch / var / ftp / pub / aa.txt

#Create oneaa.txtFor test use

In the physical machine browser input

ftp:// station.domain90.example.com/pub /

, And then download the file

#TestftpNormal,

CanNo download file

12,

Implementing awebServer. For the site


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http://station.domain90.example.comImplementing awebServices, then complete the followingSteps:

a)

Download

ftp://server.domain90.example.com/pub/rhcsa/station.html

b)

Rename the downloaded file

As

index.htmlc)

Copy

index.htmlTo youwebServicesDocumentRootDirectory

d)

Do notindex.html

The contents of any changes

Answer:

yum install httpd \ *-y

#Installation

webService

vim / etc / httpd / conf / httpd.conf

#Editor


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ServerName station.domain90.example.com: 80#ModificationServerNameOK, read this

service httpd restart

#Restart Service

chkconfig httpd on

#Set boot

wgetftp://server.domain90.example.com/pub/rhcsa/station.html

#Download the file

mv station.html / var / www / html / index.html

#Renamed and moved to the specified directory

restorecon

-R / var / www / html /

Test, enter the URL on a physical machinehttp://station.domain90.example.com

Note:


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restoreconCommand andchconSimilar commands, but it is based on current policy settings the default file context files anddocuments relating to the object of securityHereinafter, therefore, the user does not specify a security context, on the contrary,restoreconUse file context file entries that match the file name, and then applySpecific security context, in some cases, it is to restore the correct security context

13,

Configure user accounts. Create a user

aclan,uid

As3895. The password for the usernimsdreg.

Answer:

useradd-

u 3895 aclan

#-UIs setuidNo.

3895Addaclan

User

passwd aclan


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#Set Password

14,

Adding a

swapPartition. On your system to add an extra size756MSwap, the swap partition at bootIt should be able to automatically mount. Do not remove, and change the existing swappartition on your system.

Answer:

dd if = / dev / zero of = file bs = 1M count = 756

#Generating a size756MFile

mkswap file

swapon file

vim / etc / fstab

#Edit the files, settings automatically mount

/ Root / fileswap

swapdefaults00

#Insert the statement in the final set to mount

cat / proc / swaps


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#Validation check will find the newfile. Also availablefree-

lOrswapon-sVerification

15,

Find the file. Identify all owners arejuliaFiles and copy them to/ Root / findresultsCatalog.

Answer:

mkdir / root / findresults

#CreatefindresultsFolder

find /-user julia-exec cp

-a {} / root / findresults / \;

#Find

/Next,Users


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juliaDocumentAnd copied to/ Root / findresultsAnnotation[Li3]:

Context