RedHat RHCE 問題集

質問 1：
CORRECT TEXT
Configure the NTP service in your system.
正解：
see explanation below. Explanation system-config-date &


質問 2：
CORRECT TEXT
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition.
正解：
#fdisk/dev/sdap(checkPartitiontable)n(createnewpartition:pressetocreateextendedpartitionpressptocreatethemainpartitionandtheextendedpartitionisfurtherdividedintologicalpartitions)Enter+2Gt8I82Wpartx-a/dev/sdapartprobemkswap/dev/sda8CopyUUIDswapon-avim/etc/fstabUUID=XXXXXswapswapdefaults00(swapon-s)

質問 3：
CORRECT TEXT
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition.
正解：
#fdisk/dev/sdap(checkPartitiontable)n(createnewpartition:pressetocreateextendedpartitionpressptocreatethemainpartitionandtheextendedpartitionisfurtherdividedintologicalpartitions)Enter+2GtlWpartx-a/dev/sdapartprobemkswap/dev/sda8CopyUUIDswapon-avim/etc/fstabUUID=XXXXXswapswapdefaults00(swapon-s)

質問 4：
CORRECT TEXT
Configure the permissions of /var/tmp/fstab
Copy the file /etc/fstab to /var/tmp/fstab. Configure the permissions of /var/tmp/fstab so that:
the file /var/tmp/fstab is owned by the root user.
the file /var/tmp/fstab belongs to the group root.
the file /var/tmp/fstab should not be executable by anyone.
the user natasha is able to read and write /var/tmp/fstab.
the user harry can neither write nor read /var/tmp/fstab.
all other users (current or future) have the ability to read /var/tmp/fstab.
正解：
cp-a/etc/fstab/var/tmp
cd/var/tmp
ls-l
getfacl/var/tmp/fstab
chmodugo-x/var/tmp/fstab[Noneedtodothistherewon'tbeexecutepermissionforthefilebydefault]
#setfacl-mu:natasha:rw/var/tmp/fstab
#setfacl-mu:harry:0/var/tmp/fstab(zero)[Readpermissionwillbethereforalltheusersbydefault.Checkitusingls-l/var/tmp/fstab]Verifyby[ls-la/var/tmp/fstab]

質問 5：
CORRECT TEXT
Find all lines in the file /usr/share/dict/words that contain the string seismic. Put a copy of all these lines in their original order in the file /root/wordlist. /root/wordlist should contain no empty lines and all lines must be exact copies of the original lines in /usr/share/dict/words.
正解：
grepseismic/usr/share/dict/words>/root/wordlist

質問 6：
CORRECT TEXT
Create a new logical volume according to the following requirements:
The logical volume is named database and belongs to the datastore volume group and has a size of 50 extents.
Logical volumes in the datastore volume group should have an extent size of 16 MB.
Format the new logical volume with a ext3 filesystem.
The logical volume should be automatically mounted under /mnt/database at system boot time.
正解：
fdisk-cu/dev/vdapartx-a/dev/vdapvcreate/dev/vdaxvgcreatedatastore/dev/vdax-s16Mlvcreate-l50-ndatabasedatastoremkfs.ext3/dev/datastore/databasemkdir/mnt/databasemount/dev/datastore/database/mnt/database/df-Thvi/etc/fstab/dev/datastore/database/mnt/database/ext3defaults00mount-a

質問 7：
CORRECT TEXT
Open kmcrl value of 5 , and can verify in /proc/ cmdline
正解：
#vim/boot/grub/grub.confkernel/vmlinuz-2.6.32-71.el6.x86_64roroot=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSrootrd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DMLANG=en_US.UTF-8SYSFONT=latarcyrheb-sun16KEYBOARDTYPE=pcKEYTABLE=uscrashkernel=autorhgbquietkmcrl=5Restarttotakeeffectandverification:
#cat/proc/cmdlineroroot=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSrootrd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DMLANG=en_US.UTF-8SYSFONT=latarcyrheb-sun16KEYBOARDTYPE=pcKEYTABLE=usrhgbquietkmcrl=5

質問 8：
CORRECT TEXT
Successfully resolve to server1.example.com where your DNS server is 172.24.254.254.
正解：
vi/etc/resolv.confnameserver172.24.254.254
hostserver1.example.comOneveryclientsDNSserverisspecifiedin/etc/resolv.conf.WhenyourequestbynameittriestoresolvfromDNSserver.