RedHat Red Hat Certified System Administrator - RHCSA (EX200 Korean Version) : EX200 Korean

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
mkdir -p /root/d1
find /usr/local -type f -size +3k -size -5k -exec cp -rvf {} /root/d1/ \;
chmod g+s /root/d1
ls -ld /root/d1
Detailed Explanation:
* -size +3k means greater than 3 KB.
* -size -5k means less than 5 KB.
* chmod g+s sets the SGID bit on the directory.
* SGID on a directory causes new files created there to inherit the directory's group.

Correct Answer:

Solution:
[root@node2 ~]# lsblk
[root@node2 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): n
Partition number (3-128, default 3):
First sector (1476608-10485726, default 1476608):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (1476608-10485726, default 10485726): +512M
Created a new partition 3 of type 'Linux filesystem' and of size 512 MiB.
Command (m for help): w
The partition table has been altered.
Syncing disks.
[root@node2 ~]# mkswap /dev/vdb3
[root@node2 ~]# vim /etc/fstab
/dev/vdb3 swap swap defaults 0 0
[root@node2 ~]# swapon -a
[root@node2 ~]# swapon
NAME TYPE SIZE USED PRIO
/dev/vdb2 partition 243M 0B -2
/dev/vdb3 partition 512M 0B -3

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
groupadd ops
visudo -f /etc/sudoers.d/ops-restart-httpd
Add this line to the file:
%ops ALL=(ALL) NOPASSWD: /usr/bin/systemctl restart httpd
Set correct permissions:
chmod 440 /etc/sudoers.d/ops-restart-httpd
visudo -cf /etc/sudoers.d/ops-restart-httpd
Detailed Explanation:
* Using /etc/sudoers.d/ is the standard safe approach.
* visudo validates syntax and helps prevent syntax errors.
* %ops applies the rule to the whole group.
* Restricting the exact command is better than granting broad sudo access. Red Hat's RHEL 10 security
hardening guide documents sudo configuration through sudoers. ( Red Hat Documentation )

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
* Partition the disk:
fdisk /dev/sdb
Inside fdisk:
* n = new partition
* p = primary
* 1 = partition number
* accept defaults
* size +700M
* t = change type
* set Linux LVM type
* w = write changes
* Create the physical volume:
pvcreate /dev/sdb1
* Create the volume group:
vgcreate vg_data /dev/sdb1
* Create the logical volume:
lvcreate -L 500M -n lv_data vg_data
* Create the filesystem:
mkfs.xfs /dev/vg_data/lv_data
Detailed Explanation:
* The lab specifies a 700 MB partition and a 500 MB logical volume.
* pvcreate initializes the partition for LVM.
* vgcreate builds the storage pool.
* lvcreate allocates space from the volume group.
* mkfs.xfs creates the filesystem, which is standard on RHEL.

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
* Create the swap partition:
fdisk /dev/sdb
partprobe /dev/sdb
* Format it for swap:
mkswap /dev/sdb2
* Enable it:
swapon /dev/sdb2
* Persist it in /etc/fstab:
echo "/dev/sdb2 swap swap defaults 0 0" > > /etc/fstab
* Verify:
swapon --show
Detailed Explanation:
* mkswap prepares the partition as swap space.
* swapon activates it immediately.
* Adding an /etc/fstab entry ensures it survives reboot.
* The lab uses a partition-based swap workflow.