ex200 exam questions : Aug 2021 Edition

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Q1. CORRECT TEXT

Configure autofs to make sure after login successfully, it has the home directory autofs, which is shared as /rhome/ldapuser40 at the ip: 172.24.40.10. and it also requires that, other ldap users can use the home directory normally.

Answer: # chkconfig autofs on

# cd /etc/

# vim /etc/auto.master

/rhome /etc/auto.ldap

# cp auto.misc auto.ldap

# vim auto.ladp

ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40

* -rw,soft,intr 172.16.40.10:/rhome/&

# service autofs stop

# server autofs start

# showmount -e 172.24.40.10

# su - ladpuser40

Q2. CORRECT TEXT

Create a user named alex, and the user id should be 1234, and the password should be alex111.

Answer: # useradd -u 1234 alex

# passwd alex

alex111

echo alex111|passwd -stdin alex

Q3. CORRECT TEXT

Answer: # chkconfig autofs on

# cd /etc/

# vim /etc/auto.master

/rhome /etc/auto.ldap

# cp auto.misc auto.ldap

# vim auto.ladp

ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40

* -rw,soft,intr 172.16.40.10:/rhome/&

# service autofs stop

# server autofs start

# showmount -e 172.24.40.10

# su - ladpuser40

Q4. CORRECT TEXT

Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set between 280 and 320. (This logical volume has been mounted in advance.)

Answer: # vgdisplay

(Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend)

# lvdisplay (Check lv)

# lvextend -L +110M /dev/vg2/lv2

# resize2fs /dev/vg2/lv2

mount -a

(Verify)

------------------------------------------------------------------------------- (Decrease lvm)

# umount /media

# fsck -f /dev/vg2/lv2

# resize2fs -f /dev/vg2/lv2 100M

# lvreduce -L 100M /dev/vg2/lv2

# mount -a

# lvdisplay (Verify)

# e2fsck -f /dev/vg1/lvm02

# resize2fs -f /dev/vg1/lvm02

# mount /dev/vg1/lvm01 /mnt

# lvreduce -L 1G -n /dev/vg1/lvm02

# lvdisplay (Verify)

Q5. CORRECT TEXT

Configure the verification mode of your host account and the password as LDAP. And it can ldapuser40. The password is set as "password". And the certificate login successfully through

can be downloaded from http://ip/dir/ldap.crt. After the user logs on , the user has no host directory unless you configure the autofs in the following questions.

Answer: system-config-authentication

LDAP Server: ldap//instructor.example.com (In domain form, not write IP)

# yum groupinstall directory-client (1.krb5-workstation 2.pam-krb5 3.sssd)

# system-config-authentication

:1.User Account Database: LDAP

:2.LDAP Search Base DN: dc=example,dc=com

:3.LDAP Server: ldap://instructor.example.com (In domain form, not write IP)

:4.Download CA Certificate

:5.Authentication Method: LDAP password

:6.Apply

getent passwd ldapuser40

Q6. CORRECT TEXT

Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server. )

Answer: # cd /etc/yum.repos.d

# vim local.repo

[local]

name=local.repo

baseurl=file:///mnt

enabled=1

gpgcheck=0

# yum makecache

# yum install -y vsftpd

# service vsftpd restart

# chkconfig vsftpd on

# chkconfig --list vsftpd

# vim /etc/vsftpd/vsftpd.conf

anonymous_enable=YES

Q7. CORRECT TEXT

Create a volume group, and set 16M as a extends. And divided a volume group containing 50 extends on volume group lv, make it as ext4 file system, and mounted automatically under /mnt/data.

Answer: # pvcreate /dev/sda7 /dev/sda8

# vgcreate -s 16M vg1 /dev/sda7 /dev/sda8

# lvcreate -l 50 -n lvm02

# mkfs.ext4 /dev/vg1/lvm02

# blkid /dev/vg1/lv1

# vim /etc/fstab

# mkdir -p /mnt/data

UUID=xxxxxxxx /mnt/data ext4 defaults 0 0

# vim /etc/fstab

# mount -a

# mount

(Verify)

Q8. CORRECT TEXT

Copy /etc/fstab to /var/tmp name admin, the user1 could read, write and modify it, while user2 without any permission.

Answer: # cp /etc/fstab /var/tmp/

# chgrp admin /var/tmp/fstab

# setfacl -m u:user1:rwx /var/tmp/fstab

# setfacl -m u:user2:--- /var/tmp/fstab

# ls -l

-rw-rw-r--+ 1 root admin 685 Nov 10 15:29 /var/tmp/fstab

Q9. CORRECT TEXT

Copy /etc/fstab to /var/tmp name admin, the user1 could read, write and modify it, while user2 without any permission.

Answer: # cp /etc/fstab /var/tmp/

# chgrp admin /var/tmp/fstab

# setfacl -m u:user1:rwx /var/tmp/fstab

# setfacl -m u:user2:--- /var/tmp/fstab

# ls -l

-rw-rw-r--+ 1 root admin 685 Nov 10 15:29 /var/tmp/fstab

Q10. CORRECT TEXT

Copy /etc/fstab to /var/tmp name admin, the user1 could read, write and modify it, while user2 without any permission.

Answer: # cp /etc/fstab /var/tmp/

# chgrp admin /var/tmp/fstab

# setfacl -m u:user1:rwx /var/tmp/fstab

# setfacl -m u:user2:--- /var/tmp/fstab

# ls -l

-rw-rw-r--+ 1 root admin 685 Nov 10 15:29 /var/tmp/fstab

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