RHCE 無料問題集「RedHat Red Hat Certified Engineer - RHCE」
CORRECT TEXT
Create a user alex with a userid of 3400. The password for this user should be redhat.
Create a user alex with a userid of 3400. The password for this user should be redhat.
正解：
useradd-u3400alex
passwdalex
su-alex
passwdalex
su-alex
CORRECT TEXT
Create a user named alex, and the user id should be 1234, and the password should be alex111.
Create a user named alex, and the user id should be 1234, and the password should be alex111.
正解：
#useradd-u1234alex
#passwdalexalex111alex111ORechoalex111|passwd-stdinalex
#passwdalexalex111alex111ORechoalex111|passwd-stdinalex
CORRECT TEXT
Create a volume group, and set 8M as a extends. Divided a volume group containing 50 extends on volume group lv (lvshare), make it as ext4 file system, and mounted automatically under /mnt/data. And the size of the floating range should set between 380M and 400M.
Create a volume group, and set 8M as a extends. Divided a volume group containing 50 extends on volume group lv (lvshare), make it as ext4 file system, and mounted automatically under /mnt/data. And the size of the floating range should set between 380M and 400M.
正解：
#fdisk
#partprobe
#pvcreate/dev/vda6
#vgcreate-s8Mvg1/dev/vda6-s
#lvcreate-nlvshare-l50vg1-l
#mkfs.ext4/dev/vg1/lvshare
#mkdir-p/mnt/data
#vim/etc/fstab/dev/vg1/lvshare/mnt/dataext4defaults00
#mount-a
#df-h
#partprobe
#pvcreate/dev/vda6
#vgcreate-s8Mvg1/dev/vda6-s
#lvcreate-nlvshare-l50vg1-l
#mkfs.ext4/dev/vg1/lvshare
#mkdir-p/mnt/data
#vim/etc/fstab/dev/vg1/lvshare/mnt/dataext4defaults00
#mount-a
#df-h
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Create a backup file named /root/backup.tar.bz2, which contains the contents of /usr/local, bar must use the bzip2 compression.
Create a backup file named /root/backup.tar.bz2, which contains the contents of /usr/local, bar must use the bzip2 compression.
正解：
cd/usr/localtar-jcvf/root/backup.tar.bz2*mkdir/testtar-jxvf/root/backup.tar.bz2-C/test/
CORRECT TEXT
Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).
Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).
正解：
if=/dev/zeroof=/swapfilebs=1Mcount=600mkswap/swapfile/etc/fstab:/swapfileswapswapdefaults00mount-a
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Binding to an external validation server.
System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as required:
Base DN of validation service is dc=example,dc=com
LDAP is used for providing account information and validation information Connecting and using the certification of http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encrypt
After the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish autofs questions, ldapuser1 password is password.
Binding to an external validation server.
System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as required:
Base DN of validation service is dc=example,dc=com
LDAP is used for providing account information and validation information Connecting and using the certification of http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encrypt
After the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish autofs questions, ldapuser1 password is password.
正解：
yum-yinstallsssdauthconfig-gtkkrb5-workstationauthconfig-gtk//openthegraphicalinterfaceModifyuseraccountdatabasetoldapfillupDNandLDAPSERVERasquestionsrequireduseTLStoencryptconnectionsmakingtickwritehttp://server.domain11.example.com/pub/EXAMPLE-CA-CERTtodownloadcaauthenticationmethodchooseldappassword.Youcantestiftheldapuserisaddedbythefollowingcommand:Idldapuser1Note:userpassworddoesn'tnotneedtoset
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Make a swap partition having 100MB. Make Automatically Usable at System Boot Time.
Make a swap partition having 100MB. Make Automatically Usable at System Boot Time.
正解：
Usefdisk/dev/hda->Tocreatenewpartition.
Typen->ForNewpartition
ItwillaskforLogicalorPrimaryPartitions.Presslforlogical.
ItwillaskfortheStartingCylinder:UsetheDefaultbypressingEnterKey.
TypetheSize:+100M->YoucanSpecifyeitherLastcylinderofSizehere.
PressPtoverifythepartitionslistsandrememberthepartitionsname.DefaultSystemIDis83thatmeansLinuxNative.
TypettochangetheSystemIDofpartition.
TypePartitionNumber
Type82thatmeansLinuxSwap.
Presswtowriteonpartitionstable.
EitherRebootorusepartprobecommand.
mkswap/dev/hda?->TocreateSwapFilesystemonpartition.
swapon/dev/hda?->ToenabletheSwapspacefrompartition.
free-m->VerifyEitherSwapisenabledornot.
vi/etc/fstab/dev/hda?swapswapdefaults00
ReboottheSystemandverifythatswapisautomaticallyenabledornot.
Typen->ForNewpartition
ItwillaskforLogicalorPrimaryPartitions.Presslforlogical.
ItwillaskfortheStartingCylinder:UsetheDefaultbypressingEnterKey.
TypetheSize:+100M->YoucanSpecifyeitherLastcylinderofSizehere.
PressPtoverifythepartitionslistsandrememberthepartitionsname.DefaultSystemIDis83thatmeansLinuxNative.
TypettochangetheSystemIDofpartition.
TypePartitionNumber
Type82thatmeansLinuxSwap.
Presswtowriteonpartitionstable.
EitherRebootorusepartprobecommand.
mkswap/dev/hda?->TocreateSwapFilesystemonpartition.
swapon/dev/hda?->ToenabletheSwapspacefrompartition.
free-m->VerifyEitherSwapisenabledornot.
vi/etc/fstab/dev/hda?swapswapdefaults00
ReboottheSystemandverifythatswapisautomaticallyenabledornot.
CORRECT TEXT
The firewall must be open.
The firewall must be open.
正解：
/etc/init.d/iptablesstartiptables-Fiptables-Xiptables-Z/etc/init.d/iptablessavechkconfigiptableson
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Configure /var/tmp/fstab Permission.
Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following:
Owner of the file /var/tmp/fstab is Root, belongs to group root
File /var/tmp/fstab cannot be executed by any user
User natasha can read and write /var/tmp/fstab
User harry cannot read and write /var/tmp/fstab
All other users (present and future) can read var/tmp/fstab.
Configure /var/tmp/fstab Permission.
Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following:
Owner of the file /var/tmp/fstab is Root, belongs to group root
File /var/tmp/fstab cannot be executed by any user
User natasha can read and write /var/tmp/fstab
User harry cannot read and write /var/tmp/fstab
All other users (present and future) can read var/tmp/fstab.
正解：
cp/etc/fstab/var/tmp/
/var/tmp/fstabviewtheownersetfacl-mu:natasha:rw-/var/tmp/fstabsetfacl-mu:haryy:---/var/tmp/fstabUsegetfacl/var/tmp/fstabtoviewpermissions
/var/tmp/fstabviewtheownersetfacl-mu:natasha:rw-/var/tmp/fstabsetfacl-mu:haryy:---/var/tmp/fstabUsegetfacl/var/tmp/fstabtoviewpermissions
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Install the Kernel Upgrade.
Install suitable kernel update from:
http://server.domain11.example.com/pub/updates.
Following requirements must be met:
Updated kernel used as the default kernel of system start-up.
The original kernel is still valid and can be guided when system starts up.
Install the Kernel Upgrade.
Install suitable kernel update from:
http://server.domain11.example.com/pub/updates.
Following requirements must be met:
Updated kernel used as the default kernel of system start-up.
The original kernel is still valid and can be guided when system starts up.
正解：
UsingthebrowseropentheURLinthequestiondownloadkernelfiletorootorhomedirectory.uname-r//checkthecurrentkernelversionrpm-ivhkernel-*.rpmvi/boot/grub.conf//checkSomequestionsare:Installandupgradethekernelasrequired.Toensurethatgrub2isthedefaultitemforstartup.Yumrepo:http://content.example.com/rhel7.0/x86-64/errataORuname-r//checkkernelYum-config-manager--add-repo="http://content.example.com/rhel7.0/x86-64/errata"YumcleanallYumlistkernel//installdirectlyYum-yinstallkernel//stuckwithitdonotpipe!Pleasedonotpipe!Defaultenablenewkernelgrub2-editenvlist//checkModifygrub2-set-default"kernelfullname"Grub2-mkconfig-o/boot/grub2/grub.cfg//Refresh