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| Section | Objectives |
|---|---|
| Topic 1: Create simple shell scripts | - Use looping constructs to process files and command-line input - Process script inputs - Process output of shell commands within a script - Conditionally execute code |
| Topic 2: Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Mount and unmount network file systems using NFS - Configure autofs - Diagnose and correct file permission problems - Extend existing logical volumes |
| Topic 3: Manage software | - Configure access to Flatpak repositories - Install and remove RPM software packages - Install and remove Flatpak software packages - Configure access to RPM repositories |
| Topic 4: Manage basic networking | - Configure network services to start automatically at boot - Configure hostname resolution - Restrict network access using firewalld and firewall-cmd - Configure IPv4 and IPv6 addresses |
| Topic 5: Manage security | - Set enforcing and permissive modes for SELinux - Restore default file contexts - List and identify SELinux file and process contexts - Manage default file permissions - Configure firewall settings using firewall-cmd and firewalld - Use Boolean settings to modify SELinux settings - Manage SELinux port labels - Configure key-based authentication for SSH |
| Topic 6: Configure local storage | - Configure systems to mount file systems at boot by UUID or label - Create and remove physical volumes - Create and delete logical volumes - Add new partitions, logical volumes, and swap non-destructively - Assign physical volumes to volume groups - List, create, and delete partitions on GPT disks |
| Topic 7: Operate running systems | - Identify CPU and memory intensive processes and kill processes - Preserve system journals - Securely transfer files between systems - Interrupt the boot process to gain access to a system - Adjust process scheduling - Boot systems into different targets manually - Locate and interpret system log files and journals - Boot, reboot, and shut down a system normally - Start, stop, and check the status of network services - Manage tuning profiles |
| Topic 8: Manage users and groups | - Create, delete, and modify local user accounts - Change passwords and adjust password aging for local users - Create, delete, and modify local groups and group memberships - Configure privileged access |
| Topic 9: Understand and use essential tools | - Access remote systems using SSH - Access a shell prompt and issue commands with correct syntax - Create and edit text files - Log in and switch users in multi-user targets - Create hard and soft links - Locate, read, and use system documentation - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Create, delete, copy, and move files and directories - Use grep and regular expressions to analyze text - List, set, and change standard ugo/rwx permissions - Use input-output redirection |
| Topic 10: Deploy, configure, and maintain systems | - Install and update software packages - Start and stop services and configure services to start automatically at boot - Schedule tasks using at, cron, and systemd timer units - Modify the system bootloader - Configure time service clients - Configure systems to boot into a specific target automatically |
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NEW QUESTION # 30
Configure autofs
Configure autofs to automatically mount the home directory of a remote user as described below:
- materials.example.com (172.25.254.254) exports /rhome via NFS to your system. This filesystem contains a pre-configured home directory for the user remoteuser1.
- The home directory of remoteuser1 is materials.example.com:/rhome/remoteuser1.
- The home directory of remoteuser1 should be automatically mounted locally at /rhome/remoteuser1.
- The home directory must be writable by the user.
- The password for remoteuser1 is "flectrag".
Answer:
Explanation:
# Preparations (not required for the exam)
# Go back to foundation0, remote into classroom, create the remoteuser1 user and directory.
# This step is necessary to avoid issues with autofs mounting during testing.
[kiosk@foundation0 ~]$ ssh root@classroom 'useradd -u 1010 remoteuser1 && mkdir -p /rhome/remoteuser1 && chown remoteuser1: /rhome/remoteuser1'
# Install nfs-utils and autofs
[root@node1 ~]# yum -y install nfs-utils autofs
[root@node1 ~]# vim /etc/auto.master
/rhome /etc/auto.rhome
[root@node1 ~]# vim /etc/auto.rhome
remoteuser1 -rw materials.example.com:/rhome/remoteuser1
[root@node1 ~]# systemctl enable --now autofs
# Verification
[root@node1 ~]# ll /rhome/
[root@node1 ~]# ssh remoteuser1@localhost
remoteuser1@localhost\'s password: `flectrag`
$ pwd
/rhome/remoteuser1
$ touch my.file
$ mount | grep rhome
...
materials.example.com:/rhome/remoteuser1 on /rhome/remoteuser1 type nfs4 (`rw`,relatime,vers=4.2,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.25.250.100,local_lock=none,addr=172.25.254.254)
NEW QUESTION # 31
Part 1 (on Node1 Server)
Task 17 [Accessing Linux File Systems]
Find all the files owned by user "alex" and redirect the output to /home/alex/files.
Answer:
Explanation:
* root@node1 ~]# find / -user alex -type f > /home/alex/files
NEW QUESTION # 32
Create a backup file named /root/backup.tar.bz2, which contains the contents of /usr/local, bar must use the bzip2 compression.
Answer:
Explanation:
cd /usr/local
tar -jcvf /root/backup.tar.bz2*
mkdir /test
tar -jxvf /root/backup.tar.bz2 -C /test/
NEW QUESTION # 33
Configure Cron Job
Configure a cron job to automatically execute /usr/bin/echo hello every day at 14:23 for the user harry.
Answer:
Explanation:
[root@node1 ~]# systemctl status crond
[root@node1 ~]# systemctl enable crond
[root@node1 ~]# crontab -e -u harry
23 14 * * * /usr/bin/echo hello
# Verification
[root@node1 ~]# crontab -l -u harry
NEW QUESTION # 34
Create a logical volume
Create a new logical volume as required:
Name the logical volume as database, belongs to datastore of the volume group, size is 50 PE.
Expansion size of each volume in volume group datastore is 16MB.
Use ext3 to format this new logical volume, this logical volume should automatically mount to /mnt/database
Answer:
Explanation:
fdisk -cu /dev/vda// Create a 1G partition, modified when needed
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
Restart and check all the questions requirements.
NEW QUESTION # 35
......
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