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| Section | Objectives |
|---|---|
| Understand and use essential tools | - Use grep and regular expressions to analyze text - Access remote systems using SSH - List, set, and change standard ugo/rwx permissions - Create and edit text files - Access a shell prompt and issue commands with correct syntax - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Create, delete, copy, and move files and directories - Use input-output redirection - Create hard and soft links - Log in and switch users in multi-user targets - Locate, read, and use system documentation |
| Manage security | - Manage default file permissions - Manage SELinux port labels - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts - Use Boolean settings to modify SELinux settings - Configure key-based authentication for SSH - Configure firewall settings using firewall-cmd and firewalld - Restore default file contexts |
| Configure local storage | - Add new partitions, logical volumes, and swap non-destructively - List, create, and delete partitions on GPT disks - Create and delete logical volumes - Configure systems to mount file systems at boot by UUID or label - Create and remove physical volumes - Assign physical volumes to volume groups |
| Manage users and groups | - Create, delete, and modify local user accounts - Create, delete, and modify local groups and group memberships - Change passwords and adjust password aging for local users - Configure privileged access |
| Manage software | - Install and remove Flatpak software packages - Install and remove RPM software packages - Configure access to Flatpak repositories - Configure access to RPM repositories |
| Manage basic networking | - Configure IPv4 and IPv6 addresses - Configure network services to start automatically at boot - Configure hostname resolution - Restrict network access using firewalld and firewall-cmd |
| Deploy, configure, and maintain systems | - Install and update software packages - Configure time service clients - Configure systems to boot into a specific target automatically - Start and stop services and configure services to start automatically at boot - Modify the system bootloader - Schedule tasks using at, cron, and systemd timer units |
| Create simple shell scripts | - Conditionally execute code - Use looping constructs to process files and command-line input - Process output of shell commands within a script - Process script inputs |
| Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Diagnose and correct file permission problems - Extend existing logical volumes - Mount and unmount network file systems using NFS - Configure autofs |
| Operate running systems | - Locate and interpret system log files and journals - Boot, reboot, and shut down a system normally - Interrupt the boot process to gain access to a system - Preserve system journals - Identify CPU and memory intensive processes and kill processes - Adjust process scheduling - Securely transfer files between systems - Manage tuning profiles - Boot systems into different targets manually - Start, stop, and check the status of network services |
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NEW QUESTION # 57
Create a new logical volume according to the following requirements:
The logical volume is named database and belongs to the datastore volume group and has a size of 50 extents.
Logical volumes in the datastore volume group should have an extent size of 16 MB.
Format the new logical volume with a ext3 filesystem.
The logical volume should be automatically mounted under /mnt/database at system boot time.
Answer:
Explanation:
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
NEW QUESTION # 58
Create a collaborative administrative directory /common/admin with group ownership admin and SGID permissions.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
groupadd admin
mkdir -p /common/admin
chgrp admin /common/admin
chmod 2770 /common/admin
Detailed Explanation:
* groupadd admin creates the group.
* chgrp admin assigns the group ownership.
* 2770 means:
* 2 = SGID
* 7 = owner rwx
* 7 = group rwx
* 0 = others no access
* This is a standard shared group-admin directory design.
NEW QUESTION # 59
SIMULATION
Search a String
Find out all the columns that contains the string seismic within /usr/share/dict/words, then copy all these columns to /root/lines.tx in original order, there is no blank line, all columns must be the accurate copy of the original columns.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation: grep seismic /usr/share/dict/words > /root/lines.txt
NEW QUESTION # 60
SIMULATION
There is a local logical volumes in your system, named with common and belong to VGSRV volume group, mount to the /common directory. The definition of size is 128 MB.
Requirement:
Extend the logical volume to 190 MB without any loss of data. The size is allowed between 160-160 MB after extending.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation: lvextend -L 190M /dev/mapper/vgsrv-common resize2fs /dev/mapper/vgsrv-common
NEW QUESTION # 61
Add admin group and set gid=600
Answer:
Explanation:
# groupadd -g 600 admin
NEW QUESTION # 62
......
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