EX200 Exam Dumps - Red Hat Certified System Administrator-RHCSA

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[root@node1 ~]# mkdir -p /mnt/shares

[root@node1 ~]# ls -lrt /mnt/

[root@node1 ~]# chgrp sharegrp /mnt/shares/

[root@node1 ~]# chmod 2770 /mnt/shares/

[root@node1 ~]# ls -lrt /mnt/

### For Checking ###

[root@node1 ~]# su - harry

[harry@node1 ~]$ cd /mnt/shares/

[harry@node1 shares]$ touch harry

[harry@node1 shares]$ logout

[root@node1 ~]# su - natasha

[natasha@node1 ~]$ cd /mnt/shares/

[natasha@node1 shares]$ touch natasha

[natasha@node1 shares]$ ls -lrt

-rw-rw-r--. 1 harry sharegrp 0 Mar 21 06:03 harry

-rw-rw-r--. 1 natasha sharegrp 0 Mar 21 06:03 natasha

# crontab -e -u natasha

23 14 * * * /bin/echo hiya

wq!

# cd /root; wget ftp://192.168.0.254/pub/boot.iso

# mkdir -p /media/cdrom

# vim /etc/fstab

/root/boot.iso /media/cdrom iso9660 defaults,loop 0 0

# mount -a

mount [-t vfstype] [-o options] device dir

/etc/init.d/rpcbind start

/etc/init.d/nfslock start

/etc/init.d/nfs start

chkconfig rpcbind on

chkconfig nfslock on

chkconfig nfs on

showmount -e localhost

# pvcreate /dev/sda7 /dev/sda8

# vgcreate -s 16M vg1 /dev/sda7 /dev/sda8

# lvcreate -l 50 -n lvm02

# mkfs.ext4 /dev/vg1/lvm02

# blkid /dev/vg1/lv1

# vim /etc/fstab

# mkdir -p /mnt/data

UUID=xxxxxxxx /mnt/data ext4 defaults 0 0

# vim /etc/fstab

# mount -a

# mount

(Verify)

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[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

└─vdo1 253:4 0 50G 0 vdo /vbread

[root@node2 ~]# yum install stratis* -y

[root@node2 ~]# systemctl enable --now stratisd.service

[root@node2 ~]# systemctl start stratisd.service

[root@node2 ~]# systemctl status stratisd.service

[root@node2 ~]# stratis pool create think_pool /dev/vdd

[root@node2 ~]# stratis pool list

Name Total Physical Properties

think_pool 5 GiB / 37.63 MiB / 4.96 GiB ~Ca,~Cr

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[root@node2 ~]# stratis filesystem create think_pool think_fs

[root@node2 ~]# stratis filesystem list

Pool Name Name Used Created Device UUID

think_pool think_fs 546 MiB Mar 23 2021 08:21 /stratis/think_pool/think_fs ade6fdaab06449109540c2f3fdb9417d

[root@node2 ~]# mkdir /strav

[root@node2 ~]# lsblk

[root@node2 ~]# blkid

/dev/mapper/stratis-1-91ab9faf36a540f49923321ba1c5e40d-thin-fs-ade6fdaab06449109540c2f3fdb9417d: UUID="ade6fdaa-b064-4910-9540-c2f3fdb9417d" BLOCK_SIZE="512" TYPE="xfs"

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

UUID=ade6fdaa-b064-4910-9540-c2f3fdb9417d /strav xfs defaults,x-systemd.requires=stratisd.service 0 0

[root@node2 ~]# mount /stratis/think_pool/think_fs /strav/

[root@node2 ~]# df -hT

/dev/mapper/stratis-1-91ab9faf36a540f49923321ba1c5e40d-thin-fs-ade6fdaab06449109540c2f3fdb9417d xfs 1.0T 7.2G 1017G 1% /strav

• useradd -u 3400 alex
• passwd alex
• su -alex

crontab -u mary -e

23 14 * * * echo "Hello World."

fdisk /dev/vda

pvcreate /dev/vda3

vgcreate –s 16M vg0 /dev/vda3

lvcreate –n lv0 –l 20 vg0

mkfs.ext3 /dev/mapper/vg0-lv0

mkdir /data

/etc/fstab:

/dev/mapper/vg0-lv0 /data ext3 defaults 0 0

mount –a

mount | grep data

• if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile

/etc/fstab:

/swapfile swap swap 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

# useradd -G admin harry

# useradd -G admin natasha

# useradd -s /sbin/nologin tom

# id harry;id Natasha (Show additional group)

# cat /etc/passwd

(Show the login shell)

OR

# system-config-users

• Create a partition having size 5 GB and change the syste id '8e'.
• use partprobe command
• pvcreate /dev/hda9 Suppose your partition number is hda9.
• vgextend test0 /dev/hda9 vgextend command add the physical disk on volume group.
• lvextend -L+5120M /dev/test0/lvtestvolume
• verify using lvdisplay /dev/test0/lvtestvolume.

# cat /etc/grub.conf

# cd /boot

# lftp it

# get dr/dom/kernel-xxxx.rpm

# rpm -ivh kernel-xxxx.rpm

# vim /etc/grub.conf

default=0

# cd /etc/yum.repos.d

# vim local.repo

[local]

name=local.repo

baseurl=file:///mnt

enabled=1

gpgcheck=0

# yum makecache

# yum install -y vsftpd

# service vsftpd restart

# chkconfig vsftpd on

# chkconfig --list vsftpd

# vim /etc/vsftpd/vsftpd.conf

anonymous_enable=YES

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[root@node1 ~]# cp -p /etc/fstab /var/tmp/

[root@node1 ~]# ls -lrt /etc/fstab

[root@node1 ~]# ls -lrt /var/tmp/fstab

[root@node1 ~]# chmod a+x /var/tmp/fstab

[root@node1 ~]# getfacl /var/tmp/fstab

[root@node1 ~]# setfacl -m u:harry:rw- /var/tmp/fstab

[root@node1 ~]# setfacl -m u:natasha:--- /var/tmp/fstab

[root@node1 ~]# getfacl /var/tmp/fstab

getfacl: Removing leading '/' from absolute path names

# file: var/tmp/fstab

# owner: root

# group: root

user::rwx

user:harry:rw-

user:natasha:---

group::r-x

mask::rwx

other::r-x

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[root@node1 ~]# su - natasha

[natasha@node1 ~]$ cat /var/tmp/fstab

cat: /var/tmp/fstab: Permission denied

Using the browser open the URL in the question, download kernel file to root or home directory.

uname –r// check the current kernel version

rpm –ivh kernel-*.rpm

vi /boot/grub.conf// check

Some questions are: Install and upgrade the kernel as required. To ensure that grub2 is the default item for startup.

Yum repo : http://content.example.com/rhel7.0/x86-64/errata

OR

uname -r // check kernel

Yum-config-manager --add-repo=“http://content.example.com/rhel7.0/x86-64/ errata”

Yum clean all

Yum list kernel// install directly

Yum -y install kernel// stuck with it, do not pipe! Please do not pipe!

Default enable new kernel grub2-editenv list// check

Modify grub2-set-default “kernel full name”

Grub2-mkconfig –o/boot/grub2/grub.cfg// Refresh