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Q21. CORRECT TEXT 

Add users: user2, user3. 

The Additional group of the two users: user2, user3 is the admin group Password: redhat 

Answer: # useradd -G admin user2 

# useradd -G admin user3 

# passwd user2 

redhat 

# passwd user3 

redhat 


Q22. 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 


Q23. CORRECT TEXT 

Download ftp://192.168.0.254/pub/boot.iso to /root, and mounted automatically under /media/cdrom and which take effect automatically at boot-start. 

Answer: # cd /root; wget ftp://192.168.0.254/pub/boot.iso 

# mkdir -p /media/cdrom 

# vim /etc/fstab 

/root/boot.iso /media/cdrom iso9660 defaults,loop 0 0 

# mount -a 

mount [-t vfstype] [-o options] device dir 


Q24. CORRECT TEXT 

Find the files owned by harry, and copy it to catalog: /opt/dir 

Answer: # cd /opt/ 

# mkdir dir 

# find / -user harry -exec cp -rfp {} /opt/dir/ \; 


Q25. 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 


Q26. 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 


Q27. 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