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Q21. CORRECT TEXT 

Upgrading the kernel as 2.6.36.7.1, and configure the system to Start the default kernel, keep the old kernel available. 

Answer: # cat /etc/grub.conf 

# cd /boot 

# lftp it 

# get dr/dom/kernel-xxxx.rpm 

# rpm -ivh kernel-xxxx.rpm 

# vim /etc/grub.conf 

default=0 


Q22. CORRECT TEXT 

Configure a task: plan to run echo hello command at 14:23 every day. 

Answer: # which echo 

# crontab -e 

23 14 * * * /bin/echo hello 

# crontab -l (Verify) 


Q23. 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) 

OR 

# e2fsck -f /dev/vg1/lvm02 

# resize2fs -f /dev/vg1/lvm02 

# mount /dev/vg1/lvm01 /mnt 

# lvreduce -L 1G -n /dev/vg1/lvm02 

# lvdisplay (Verify) 


Q24. 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 


Q25. CORRECT TEXT 

Configure a task: plan to run echo hello command at 14:23 every day. 

Answer: # which echo 

# crontab -e 

23 14 * * * /bin/echo hello 

# crontab -l (Verify) 


Q26. 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) 

OR 

# 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 


Q27. 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 

alex111 

OR 

echo alex111|passwd -stdin alex