EX294 Online Practice Questions and Answers

Correct Answer: Please see explanation

Correct Answer: Please see explanation

Correct Answer: Please see explanation

Correct Answer: Please see explanation

Correct Answer: A

Solution as:

Correct Answer: A

Conclusions:

1. I find that it is common to add various service access limits in the exam RHCE. The exercises like:

require one network segment can be accessed another network segments can not be accessed, the following are some conclusions for various service:

tcp_wrappers:/etc/hosts.allow,/etc/hosts.deny

tcp_wrappers can filter the TCP's accessing service. TCP whether has the filtering function which depends on this service whether use the function library of tcp_wrappers, or this service whether has the xinetd process of starting function of

tcp_wrappers. tcp_wrappers's main configuration file is /etc/hosts.allow,/etc/ hosts.deny.

And the priority of the documents in hosts. allow is higher than hosts. deny. Visit will be passed if no match was found.

sshd,vsftpd can use the filtering service of tcp_wrappers.

Configuration example:

Notice:

The two configuration files' syntax can refer to hosts_access (5) and hosts_options(5) sshd_config There are four parameters in this configuration file: DenyUsers, AllowUsers, DenyGroups, AllowGroups, they are used to limit some users or

user groups to proceed Remote Login through the SSH. These parameters' priority level is DenyUsers->AllowUsers->DenyGroups->AllowGroups Configuration example:

httpd Service Through the /etc/httpd/conf/httpd.conf in parameters, can add to control the url access. Just as:

Notice:

So pay attention, deny's and allow's priority level in order deny,allow is: the backer has the higher priority level. But here, allow's priority has a higher priority level.

nfs Service

nfs service directly control the visits through file /etc/exports, just as:

samba Service

Parameter hosts allow in /etc/samba/smb.conf which is used as Access Control, just as:

2.

Paying attention to use Mount parameters: _netdev,defaults when you are mounting ISCSI disk.

3.

Stop the NetworkManager /etc/init.d/NetworkManager stop chkconfig NetworkManager off

4.

When you are deploying ifcfg-ethX, add parameters: PEERDNS=no

5.

Empty the firewall in RHCSARHCE:

6.

Narrow lv steps:

7.

Mount the using command - swap which is newly added in /etc/fstab

8.

If Verification is not passed when you are installing software, can import public key: rpm import /etc/pki/ rpm.../...release and so on. In yum.repo, you also can deploy gpgkey, for example, gpgkey=/etc/pki/rpm.../ ...release

9.

When you are using "Find" command to search and keep these files, paying attention to use cp -a to copy files if you use user name and authority as your searching methods.

Correct Answer: A

Correct Answer: A

Correct Answer: A

1.

chmod 770 /storage

2.

Verify using : ls -ld /storage

Note:

Preview should be like: drwxrwx--- 2 root sysusers 4096 Mar 16 18:08 /storage To change the permission on directory we use the chmod command. According to the question that only the owner user (root) and group member (sysusers) can

fully access the directory so:

chmod 770 /archive

Correct Answer: A