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NEW QUESTION: 1
Forbidden the Mary user configuration tasks in your system.
Answer:
Explanation:
See Explanation
Explanation/Reference:
Modify the /etc/cron.deny, add:
[root@server1 ~]# cat /etc/cron.deny mary
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:
sshd:.example.com 192.168.0. 192.168.0.0/255.255.255.0 150.203. EXCEPT
150.203.6.66
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:
AllowUsers tim [email protected] kim@*.example.com
httpd Service
Through the /etc/httpd/conf/httpd.conf in parameters, can add <Directory> to control the url access. Just as:
< VirtualHost *:80>
DocumentRoot /var/http/virtual
ServerName www1.example.com
< Directory /var/http/virtual/limited> Options Indexes MultiViews
FollowSymlinks
order deny,allow
deny from all
allow from 192.168.0.
</Directory>
</VirtualHost>
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:
/common *.example.com(rw,sync) 192.168.0.0/24(ro,sync)
samba Service
Parameter hosts allow in /etc/samba/smb.conf which is used as Access Control,just as:
hosts allow = 192.168.0. 192.168.1.0/255.255.255.0 .example.com
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
5. When you are deploying ifcfg-ethX, add parameters:
PEERDNS=no
6. Empty the firewall in RHCSA, RHCE:
iptables -F
iptables -X
iptables -Z
/ etc/init.d/iptables save
7. Narrow lv steps:
1 .umount /dev/mapper/lv
2.e2fsck -f /dev/mapper/lv
3.resize2fs /dev/mapper/lv 100M
4.lvreduce -L 50M /dev/mapper/lv
5.mount -a
8. Mount the using command - swap which is newly added in /etc/fstab
9. 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
10. 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.

NEW QUESTION: 2
Which of the following items are capable of having names that are over 30 characters in length? (Choose 3)
A. user name
B. default name
C. constraint name
D. cursor name
E. table name
Answer: B,C,E

NEW QUESTION: 3
Which method displays text directly into the active console with a synchronous EEM applet policy?
A. event manager applet boom
event syslog pattern 'UP'
action 1.0 gets 'logging directly to console'
B. event manager applet boom
event syslog pattern 'UP'
action 1.0 puts 'logging directly to console'
C. event manager applet boom
event syslog pattern 'UP'
action 1.0 string 'logging directly to console'
D. event manager applet boom
event syslog pattern 'UP'
action 1.0 syslog priority direct msg 'log directly to console'
Answer: D

NEW QUESTION: 4
The ROADM achieves wavelength reconfigurability by blocking or crossing wavelengths, thereby making static wavelength resource allocation a flexible dynamic allocation. The ROADM technology cooperates with the network management software to adjust the wavelength up and down and punch-through state to achieve remote dynamic adjustment of the wavelength state, and supports up to 80 wavelengths.
A. True
B. False
Answer: A