Red Hat Certified System Administrator Latest RHCSA EX200 Exam Questions with solutions based on RHELv8 and RHELv9 Part-2
Part-2 Please perform this activity on Server-2 (serverb)
Q14. Reset root user password and make it 'trootent'
To reset the root user password, follow these steps:
1. Press 'e' for starting system
2. Put in the last line of linux16: 'rd.break'
3. Press 'ctrl + x'
# mount -o remount,rw /sysroot
# chroot /sysroot
# passwd root
Enter the new password, for example, 'trootent'
# touch /.autorelabel
# exit
# exit
Q15. Configure YUM Repos
Base_url = "http://content.example.com/rhel8.0/x86_64/dvd/BaseOS"
AppStrem_url = "http://content.example.com/rhel8.0/x86_64/dvd/AppStream"
# scp -r /etc/yum.repos.d/local.repo root@172.25.250.10:/etc/yum.repos.d/ # cat /etc/yum.repos.d/local.repo [local_repo] name=Local Repository baseurl=http://content.example.com/rhel8.0/x86_64/dvd/BaseOS gpgcheck=0 enabled=1 [local_appstream_repo] name=Local AppStream Repository baseurl=http://content.example.com/r
Q16. Resize a Logical Volume : - Resize the logical volume "mylv" so that after reboot the size should be in between 200MB to 300MB
# df -h
# vgdisplay
# lvextend -L 300M /dev/mapper/myvg-mylv
# lvdisplay /dev/mapper/myvg-mylv
# resize2fs /dev/mapper/myvg-mylv
Q17. Add a swap partition of 956MB and mount it permanently.
# fdisk /dev/vdb
n (create new partition)
p (check Partition table)
Enter
+965M
t
82
w
# mkswap /dev/vdb2
Then copy UUID
# vim /etc/fstab
UUID=XXXXX swap swap defaults 0 0
# systemctl daemon-reload
# swapon -a
# swapon -s
Q18. Create a logical Volume and mount it permanently
To create a logical volume and mount it permanently, follow these steps:
# fdisk /dev/vdb
n (create new partition:)
p (check Partition table)
3
Enter
+640M
w
# partprobe
# pvcreate /dev/vdb3
# vgcreate -s 32M wgroup /dev/vdb3
# lvcreate -n wshare -l 20 wgroup
# mkfs.ext3 /dev/wgroup/wshare
# mkdir /mnt/wshare
Then, add the following line to the /etc/fstab file:
# vi /etc/fstab /dev/wgroup/wshare /mnt/wshare ext3 defaults 0 0 # mount -a
Q19. Create a new VDO partition
To create a new VDO partition with the following requirements:
- Use the unpartitioned disk
- VDO name "Vdo1" and logical size should be 50GB
- Mount it on /vdomount permanently with file system xfs.
#yum -y install vdo kmod-kvdo
#systemctl enable vdo.service
#systemctl start vdo.service
#lsblk
#vdo create –name=Vdo1 --device=/dev/vdd --vdoLogicalSize=50G
#mkfs.xfs -K /dev/mapper/Vdo1
#lsblk --output=UUID /dev/mapper/Vdo1
#mkdir /vdomount
#vi /etc/fstab (UUID=………………… /vdomount xfs defaults, x-systemd.requires=vdo.service 0 0)
#systemctl daemon-reload
Q20. Configure System Tuning:
- Choose the recommended 'tuned' profile for your system and set it as the default.
#tuned-adm active #tuned-adm recommend (virtual-guest) #tuned-adm profile virtual-guest
Q21. Container
- Create a container logserver from an image rsyslog in node1 From registry.lab.example.com
- Configure the container with systemd services by an existing user “Walhalla”,
- Service name should be container-logserver, and configure it to start automatically across reboot.
# useradd user1 # passwd user1 # yum module install container* -y # ll /var/log/ # vim /etc/systemd/journald.conf [Journal] Storage=persistent :wq! #mkdir /var/log/journal #mkdir /home/wallah/container-logserver #systemctl restart systemd-journald # cp /var/log/journal/*/* /home/wallah/container-logserver # chown -R wallah:wallah /home/wallah/container-logserver # systemctl restart systemd-journald # ll /run/log # ll /var/log/ # su - wallah # mkdir /var/log/journal # mkdir /home/wallah/container-logserver #systemctl restart systemd-journald # reboot # ssh user1@servera.lab.example.com
22 System journal with containers
- Configure your host journal to store all journal across reboot
- Copy all *.journal from /var/log/journal and all subdirectories to /home/Walhalla/container_logserver
- Configure automount /var/log/journal from logserver (container) to /home/walhalla/container_logserver when container starts
# podman login regisrty.redhat.io # username: # password: # podman search rsyslog # podman pull registry.redhat.io/rhel8/rsyslog # podman image list # podman run -d --name logserver -v /home/user1/container-logserver:/var/log/journal:Z registry.redhat.io/rhel8/rsyslog # podman container list # podman ps # mkdir -p ~/.config/systemd/wallah # cd .config/systemd/wallah/ # loginctl enable-linger # loginctl show-user user1 # podman generate systemd --name logserver -f -n # systemctl --user daemon-reload # systemctl --user enable --now container-logserver.service # systemctl --user start --now container-logserver.service # systemctl --user status --now container-logserver.service # podman exec -it logserver /bin/bash # ls /var/log/ # exit
For Server-1 Configuration Click Here
Please post a comment if you have any doubt
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RHCSA