EX200日本語 無料問題集「RedHat Red Hat Certified System Administrator - RHCSA (EX200日本語版)」
SELinuxはEnforcingモードで実行されている必要があります。
正解：
getenforce // Check the current mode of SELinux // SELinux runs in enforcing mode // Check getenforce 1 getenforce vim /etc/selinux/config selinux=enforcing // To temporarily enable SELinux wg sestatus
スワップパーティションの追加
システムに 512 MiB のスワップ パーティションを追加します。スワップ パーティションは、システムの起動時に自動的にマウントされます。システム上の既存のスワップ パーティションを削除または変更しないでください。
システムに 512 MiB のスワップ パーティションを追加します。スワップ パーティションは、システムの起動時に自動的にマウントされます。システム上の既存のスワップ パーティションを削除または変更しないでください。
正解：
[root@node2 ~]# lsblk
[root@node2 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): n
Partition number (3-128, default 3):
First sector (1476608-10485726, default 1476608):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (1476608-10485726, default 10485726): +512M
Created a new partition 3 of type 'Linux filesystem' and of size 512 MiB.
Command (m for help): w
The partition table has been altered.
Syncing disks.
[root@node2 ~]# mkswap /dev/vdb3
[root@node2 ~]# vim /etc/fstab
/dev/vdb3 swap swap defaults 0 0
[root@node2 ~]# swapon -a
[root@node2 ~]# swapon
NAME TYPE SIZE USED PRIO
/dev/vdb2 partition 243M 0B -2
/dev/vdb3 partition 512M 0B -3
[root@node2 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): n
Partition number (3-128, default 3):
First sector (1476608-10485726, default 1476608):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (1476608-10485726, default 10485726): +512M
Created a new partition 3 of type 'Linux filesystem' and of size 512 MiB.
Command (m for help): w
The partition table has been altered.
Syncing disks.
[root@node2 ~]# mkswap /dev/vdb3
[root@node2 ~]# vim /etc/fstab
/dev/vdb3 swap swap defaults 0 0
[root@node2 ~]# swapon -a
[root@node2 ~]# swapon
NAME TYPE SIZE USED PRIO
/dev/vdb2 partition 243M 0B -2
/dev/vdb3 partition 512M 0B -3
www.rhce.comという名前のドメインに関連付けられているIPアドレスは192.100.0.2です。暗号化通信用のSSLを実装して、Apache Webサーバーを構成します。
正解：
vi /etc/httpd/conf.d/ssl.conf <VirtualHost 192.100.0.2> ServerName www.rhce.com DocumentRoot /var/www/rhce DirectoryIndex index.html index.htm ServerAdmin [email protected] SSLEngine on SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key </VirtualHost> cd /etc/httpd/conf
3 make testcert
Create the directory and index page on specified path. (Index page can download from ftp://server1.example.com at exam time) service httpd start|restart chkconfig httpd on Apache can provide encrypted communications using SSL (Secure Socket Layer). To make use of encrypted communication, a client must request to https protocol, which is uses port 443. For HTTPS protocol required the certificate file and key file.
3 make testcert
Create the directory and index page on specified path. (Index page can download from ftp://server1.example.com at exam time) service httpd start|restart chkconfig httpd on Apache can provide encrypted communications using SSL (Secure Socket Layer). To make use of encrypted communication, a client must request to https protocol, which is uses port 443. For HTTPS protocol required the certificate file and key file.
alexという名前のユーザーを作成します。ユーザーIDは1234で、パスワードはalex111である必要があります。
正解：
# useradd -u 1234 alex
# passwd alex
alex111
alex111
OR
echo alex111|passwd -stdin alex
# passwd alex
alex111
alex111
OR
echo alex111|passwd -stdin alex
vg0の下にlv1という名前の論理ボリュームが1つ作成されます。その論理ボリュームの初期サイズは100MBです。ここで、サイズ500MBが必要になりました。データを失うことなく、論理ボリューム500Mのサイズを正常に作成します。オンラインでサイズを増やす必要があります。
正解：
The LVM system organizes hard disks into Logical Volume (LV) groups. Essentially, physical hard disk partitions (or possibly RAID arrays) are set up in a bunch of equal sized chunks known as Physical Extents (PE). As there are several other concepts associated with the LVM system, let's start with some basic definitions:
Physical Volume (PV) is the standard partition that you add to the LVM mix. Normally, a physical volume is a standard primary or logical partition. It can also be a RAID array.
Physical Extent (PE) is a chunk of disk space. Every PV is divided into a number of equal sized PEs. Every PE in a LV group is the same size. Different LV groups can have different sized PEs.
Logical Extent (LE) is also a chunk of disk space. Every LE is mapped to a specific PE.
Logical Volume (LV) is composed of a group of LEs. You can mount a file system such as /home and /var on an LV.
Volume Group (VG) is composed of a group of LVs. It is the organizational group for LVM. Most of the commands that you'll use apply to a specific VG.
Verify the size of Logical Volume: lvdisplay /dev/vg0/lv1
Verify the Size on mounted directory: df -h or df -h mounted directory name Use: lvextend -L+400M /dev/vg0/lv1 ext2online -d /dev/vg0/lv1 to bring extended size online.
Again Verify using lvdisplay and df -h command.
Physical Volume (PV) is the standard partition that you add to the LVM mix. Normally, a physical volume is a standard primary or logical partition. It can also be a RAID array.
Physical Extent (PE) is a chunk of disk space. Every PV is divided into a number of equal sized PEs. Every PE in a LV group is the same size. Different LV groups can have different sized PEs.
Logical Extent (LE) is also a chunk of disk space. Every LE is mapped to a specific PE.
Logical Volume (LV) is composed of a group of LEs. You can mount a file system such as /home and /var on an LV.
Volume Group (VG) is composed of a group of LVs. It is the organizational group for LVM. Most of the commands that you'll use apply to a specific VG.
Verify the size of Logical Volume: lvdisplay /dev/vg0/lv1
Verify the Size on mounted directory: df -h or df -h mounted directory name Use: lvextend -L+400M /dev/vg0/lv1 ext2online -d /dev/vg0/lv1 to bring extended size online.
Again Verify using lvdisplay and df -h command.
データグループの所有者にファイル/ディレクトリを作成する人は、自動的にデータと同じグループの所有者になる必要があります。
正解：
1. chmod g+s /data
2. Verify using: ls -ld /data
Permission should be like this: drwxrws--- 2 root sysadmin 4096 Mar 16 18:08 /data If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory. To set the SGID bit: chmod g+s directory To Remove the SGID bit: chmod g-s directory
2. Verify using: ls -ld /data
Permission should be like this: drwxrws--- 2 root sysadmin 4096 Mar 16 18:08 /data If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory. To set the SGID bit: chmod g+s directory To Remove the SGID bit: chmod g-s directory
システムは2つのネットワークのルーターとして使用します。 1つのネットワークは192.168.0.0/24で、もう1つのネットワークは192.168.1.0/24です。両方のネットワークのIPアドレスが割り当てられています。あるネットワークから別のネットワークにパケットをどのように転送しますか？
正解：
echo "1" >/proc/sys/net/ipv4/ip_forward
vi /etc/sysctl.conf
net.ipv4.ip_forward = 1
If you want to use the Linux System as a Router to make communication between different networks, you need enable the IP forwarding. To enable on running session just set value 1 to
/proc/sys/net/ipv4/ip_forward. As well as automatically turn on the IP forwarding features on next boot set on /etc/sysctl.conf file.
vi /etc/sysctl.conf
net.ipv4.ip_forward = 1
If you want to use the Linux System as a Router to make communication between different networks, you need enable the IP forwarding. To enable on running session just set value 1 to
/proc/sys/net/ipv4/ip_forward. As well as automatically turn on the IP forwarding features on next boot set on /etc/sysctl.conf file.
システムでFTPサービスを構成し、匿名ログインへのリモートアクセスを許可し、このサービスによってプログラムをダウンロードします。システムの再起動後もサービスはまだ実行中です。
正解：
yum install vsftpd
/etc/init.d/vsftpd start
chkconfig vsftpd on
/etc/init.d/vsftpd start
chkconfig vsftpd on
192.168.0.0/24と192.168.1.0/24の2つの異なるネットワークがあります。システムは192.168.0.0/24ネットワークにあります。 1つのRHEL6インストール済みシステムがルーターとして使用されます。必要な構成はすべて、Linuxサーバーで既に行われています。 192.168.0.254と192.168.1.254のIPアドレスがそのサーバーに割り当てられています。 192.168.1.0/24ネットワークのホストに正常にpingを送信するにはどうすればよいですか？
正解：
vi /etc/sysconfig/network GATEWAY=192.168.0.254
OR
vi /etc/sysconf/network-scripts/ifcfg-eth0 DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.0.?
NETMASK=255.255.255.0
GATEWAY=192.168.0.254
service network restart
Gateway defines the way to exit the packets. According to question System working as a router for two networks have IP Address 192.168.0.254 and 192.168.1.254.
OR
vi /etc/sysconf/network-scripts/ifcfg-eth0 DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.0.?
NETMASK=255.255.255.0
GATEWAY=192.168.0.254
service network restart
Gateway defines the way to exit the packets. According to question System working as a router for two networks have IP Address 192.168.0.254 and 192.168.1.254.