RedHat EX200 Dumps

• Verify the File whether Shared or not ? : cat /etc/exports
• Start the nfs service: service nfs start
• Start the portmap service: service portmap start
• Make automatically start the nfs service on next reboot: chkconfig nfs on
• Make automatically start the portmap service on next reboot: chkconfig portmap on
• Verify either sharing or not: showmount -e localhost
• Check that default firewall is running on system?

If running flush the iptables using iptables -F and stop the iptables service.

• chmod 770 /data
• Verify using : ls -ld /data Preview should be like:

drwxrwx--- 2 root sysadmin 4096 Mar 16 18:08 /data

To change the permission on directory we use the chmod command.

According to the question that only the owner user (root) and group member (sysadmin) can fully access the directory so: chmod 770 /data

• system-config-authentication LDAP user DN=dc=domain11,dc=example,dc=com Server= host.domain11.example.com

Certificate= (enter url carefully, there maybe // or ..)

LDAP password

OK

starting sssd

• su -ldapuser11 Display Bash prompt #exit

system-config-date &

*

•

[root@host ~]#systemctl enable sssd.service

[root@host ~]#systemctl start sssg.service

[root@host ~]#getent passwd remoteuser15

[root@host ~]#yum install autofs

[root@host ~]#vim /etc/auto.master.d/home9.autofs

/netdir/remoteuser15 /etc/auto.home9

[root@host ~]#vim /etc/auto.home9

remoteuser15 –rw,sync utility.network15.example.com:/netdir/remoteuser15/&

[root@host ~]#systemctl enable autofs

[root@host ~]#systemctl restart autofs

[root@host ~]#su - remoteuser15

• lvextend -L+200M /dev/test0/testvolume1 Use lvdisplay /dev/test0/testvolume1)
• ext2online -d /dev/test0/testvolume1

lvextend command is used the increase the size of Logical Volume. Other command lvresize command also here to resize. And to bring increased size on online we use the ext2online command.

# fdisk /dev/sda

p

(check Partition table)

n

(create new partition: press e to create extended partition, press p to create the main partition, and the extended partition is further divided into logical partitions)

Enter

+2G t

8 I

82

W

partx -a /dev/sda

partprobe

mkswap /dev/sda8

Copy UUID

swapon -a

vim /etc/fstab

UUID=XXXXX swap swap defaults 0 0

(swapon -s)

*

[root@node2 ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

vdd 252:48 0 5G 0 disk

vde 252:64 0 10G 0 disk

[root@node2 ~]# yum install kmod-kvdo vdo

[root@node2 ~]# systemctl enable --now vdo

[root@node2 ~]# systemctl start vdo

[root@node2 ~]# systemctl status vdo

[root@node2 ~]# vdo create --name=vdo1 --device=/dev/vde --vdoLogicalSize=50G

[root@node2 ~]# vdostats --hu

Device Size Used Available Use% Space saving%

/dev/mapper/vdo1 10.0G 4.0G 6.0G 40% N/A

[root@node2 ~]# mkfs.xfs -K /dev/mapper/vdo1

*

[root@node2 ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

vde 252:64 0 10G 0 disk

└─vdo1 253:4 0 50G 0 vdo

[root@node2 ~]# mkdir /vbread

[root@node2 ~]# blkid

/dev/mapper/vdo1: UUID="1ec7a341-6051-4aed-8a2c-4d2d61833227" BLOCK_SIZE="4096" TYPE="xfs"

[root@node2 ~]# vim /etc/fstab

UUID=1ec7a341-6051-4aed-8a2c-4d2d61833227 /vbread xfs defaults,x-systemd.requires=vdo.service 0 0

[root@node2 ~]# mount /dev/mapper/vdo1 /vbread/

[root@node2 ~]# df -hT

Filesystem Type Size Used Avail Use% Mounted on

/dev/mapper/vdo1 xfs 50G 390M 50G 1% /vbread

mkdir –p /home/guests

cat /etc/auto.master:

/home/guests /etc/auto.ldap

cat /etc/auto.ldap:

ldapuser1 -rw instructor.example.com:/home/guests/ldapuser1

• automatically mount all the user's home directory #* -rw instructor.example.com:/home/guests/&

vim/etc/yum.repos/base.repo

[base]

name=base

baseurl=

gpgcheck=0

enable=1

Save and Exit

Use yum list for validation, the configuration is correct if list the package information. If the Yum configuration is not correct then maybe cannot answer the following questions.

[root@node2 ~]# tuned-adm list

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

[root@node2 ~]# tuned-adm recommend

virtual-guest

[root@node2 ~]# tuned-adm profile virtual-guest

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

[root@node2 ~]# reboot

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

Download the new kernel file and then install it.

[root@desktop8 Desktop]# ls

kernel-2.6.32-71.7.1.el6.x86_64.rpm

kernel-firmware-2.6.32-71.7.1.el6.noarch.rpm

[root@desktop8 Desktop]# rpm -ivh kernel-*

Preparing... ###########################################

[100%]

1:kernel-firmware

########################################### [ 50%]

2:kernel

########################################### [100%]

Verify the grub.conf file, whether use the new kernel as the default boot. [root@desktop8 Desktop]# cat /boot/grub/grub.conf default=0

title Red Hat Enterprise Linux Server (2.6.32-71.7.1.el6.x86_64)

root (hd0,0)

kernel /vmlinuz-2.6.32-71.7.1.el6.x86_64 ro root=/dev/mapper/vol0-root rd_LVM_LV=vol0/root rd_NO_LUKS rd_NO_MD

rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet

initrd /initramfs-2.6.32-71.7.1.el6.x86_64.img

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

# vim /boot/grub/grub.conf

kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSroot

rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM

LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5

Restart to take effect and verification:

# cat /proc/cmdline

ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM

LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5

• groupadd sysmgrs
• useradd -G sysmgrs Natasha

• We can verify the newly created user by cat /etc/passwd)

# useradd -G sysmgrs harry

# useradd -s /sbin/nologin sarrh

# passwd Natasha

# passwd harry

# passwd sarrah

# vgdisplay

(Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend)

# lvdisplay (Check lv)

# lvextend -L +110M /dev/vg2/lv2

# resize2fs /dev/vg2/lv2

mount -a

(Verify)

-------------------------------------------------------------------------------

(Decrease lvm)

# umount /media

# fsck -f /dev/vg2/lv2

# resize2fs -f /dev/vg2/lv2 100M

# lvreduce -L 100M /dev/vg2/lv2

# mount -a

# lvdisplay (Verify)

OR

# e2fsck -f /dev/vg1/lvm02

# resize2fs -f /dev/vg1/lvm02

# mount /dev/vg1/lvm01 /mnt

# lvreduce -L 1G -n /dev/vg1/lvm02

# lvdisplay (Verify)

# cd /etc/syscofig/network-scripts/

# ls

# vim ifcfg-eth0 (Configure IP Address, Gateway and DNS) IPADDR=172.24.40.40

GATEWAY=172.24.40.1

DNS1=172.24.40.1

# vim /etc/sysconfig/network

(Configure Host Name)

HOSTNAME= station.domain40.example.com

OR

Graphical Interfaces:

System->Preference->Network Connections (Configure IP Address, Gateway and DNS) Vim /etc/sysconfig/network

(Configure Host Name)

*

[root@node1 ~]# useradd -u 3945 fred

[root@node1 ~]# echo "iamredhatman" | passwd --stdin fred

Changing password for user fred.

passwd: all authentication tokens updated successfully

[root@node1 ~]# vim /etc/yum.repos.d/redhat.repo

[BaseOS]

name=BaseOS

enabled=1

gpgcheck=1

[AppStream]

name=AppStream

enabled=1

gpgcheck=1

[root@node1 ~]# yum clean all

[root@node1 ~]# yum repolist

repo id repo name

AppStream AppStream

BaseOS BaseOS

[root@node1 ~]# yum list all

yum install vsftpd

/etc/init.d/vsftpd start

chkconfig vsftpd on