Correct Answer: Check the anser in explanation.

crontab –e –u natasha 23 14/bin/echo hiya crontab -l -u natasha // view systemctlenable crond systemcdlrestart crond

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/etc/sysconfig/selinux SELINUX=enforcing

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useradd eric

passwd eric

vi /etc/passwd

eric:x:505:505::/home/eric:/sbin/nologin

Which shell or program should start at login time is specified in /etc/passwd file? By default, Redhat Enterprise Linux assigns the /bin/bash shell to the users. To deny the interactive login, you should write /sbin/nologin or /bin/ false instead of login shell.

Correct Answer: Check the anser in explanation.

Yum-config-manager --add-repo=http://content.example.com/rhel7.0/x86-64/dvd” is to generate a file vim content.example.com_rhel7.0_x86_64_dvd.repo, Add a line gpgcheck=0 Yumcleanall Yumrepolist Almost 4305 packages are right, Wrong Yum Configuration will lead to some following questions cannot be worked out.

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fdisk -cu /dev/vda partx -a /dev/vda pvcreate /dev/vdax vgcreate datastore /dev/vdax -s 16M lvcreate-l 50 -n database datastore mkfs.ext3 /dev/datastore/database mkdir /mnt/database mount /dev/datastore/database /mnt/database/ df -Th vi /etc/fstab /dev/datastore /database /mnt/database/ ext3 defaults 0 0 mount -a

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grep seismic /usr/share/dict/words> /root/lines.txt

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mkdir -p /common/admin chgrp admin /common/admin chmod 2770 /common/admin

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vim /etc/auto.master /rhome /etc/auto.misc wq! # vim /etc/auto.misc ldapuser11 --rw,sync host.domain11.example.com:/rhome/ldpauser11 :wq! #service autofs restart

service autofs reload

chkconfig autofs on

su -ldapuser11 Login ldapuser with home directory # exit

Correct Answer: Check the anser in explanation.

df -hT lvextend -L +100M /dev/vg0/vo lvscan xfs_growfs /home/ // home is LVM mounted directory Note: This step is only need to do in our practice environment, you do not need to do in the real exam resize2fs /dev/vg0/vo // Use this comand to update in the real exam df -hT OR e2fsck -f/dev/vg0/vo umount /home resize2fs /dev/vg0/vo required partition capacity such as 100M lvreduce -l 100M /dev/vg0/vo mount /dev/vg0/vo /home df –Ht

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* [root@node1 ~]# curl http://node1.domain15.example.com curl: (7) Failed to connect to node1.domain15.example.com port 80: Connection refused [root@node1 ~]# yum install httpd [root@node1 ~]# systemctl enable --now httpd Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service /usr/lib/systemd/system/httpd.service. [root@node1 ~]# systemctl start httpd [root@node1 ~]# systemctl status httpd Status: "Running, listening on: port 80" * [root@node1 ~]# wget http://node1.domain15.example.com 2021-03-23 13:27:28 ERROR 403: Forbidden. [root@node1 ~]# semanage port -l | grep http http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000 [root@node1 ~]# semanage port -a -t http_port_t -p tcp 82 [root@node1 ~]# semanage port -l | grep http http_port_t tcp 82, 80, 81, 443, 488, 8008, 8009, 8443, 9000 [root@node1 ~]# firewall-cmd --zone=public --list-all [root@node1 ~]# firewall-cmd --permanent --zone=public --add-port=82/tcp [root@node1 ~]# firewall-cmd --reload

[root@node1 ~]# curl http://node1.domain15.example.com OK

* root@node1 ~]# wget http://node1.domain15.example.com:82 Connection refused. [root@node1 ~]# vim /etc/httpd/conf/httpd.conf Listen 82 [root@node1 ~]# systemctl restart httpd [root@node1 ~]# wget http://node1.domain15.example.com:82 2021-03-23 13:31:41 ERROR 403: Forbidden. [root@node1 ~]# curl http://node1.domain15.example.com:82 OK