RedHat Red Hat Certified System Administrator - RHCSA (EX200日本語版) : EX200日本語

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
mkdir -p /share/projects
chown alex /share/projects/
chmod a+rwx,+t /share/projects/
ls -ld /share/projects/
Detailed Explanation:
* chmod a+rwx gives read, write, and execute to everyone.
* +t sets the sticky bit.
* Sticky bit on a shared directory means users can create files, but only the file owner, directory owner, or
root can delete them.
* This is the same model used on /tmp.

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:
useradd harry
passwd harry
chage -M 30 -d 0 harry
chage -l harry
Detailed Explanation:
* useradd harry creates the local user.
* passwd harry sets the initial password.
* chage -M 30 sets the maximum password age to 30 days.
* chage -d 0 forces the user to change the password at next login.
* chage -l harry verifies the policy.

Correct Answer:

Solution:
# Check the disk layout
[root@node2 ~]# lsblk
# Partition the disk
[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.
Command (m for help): n # Add a new partition
Partition type
p primary (1 primary, 0 extended, 3 free) # Primary partition
e extended (container for logical partitions) # Extended partition
Select (default p): p
Partition number (2-4, default 2): # Press Enter
First sector (1026048-20971519, default 1026048): # Press Enter
***Note: The partition size must be larger than the total size, it should not be exactly equal to. It is recommended to add an extra 200M.
Last sector, +/-sectors or +/-size{K,M,G,T,P} (1026048-20971519, default 20971519): +1200M # Partition size
Created a new partition 2 of type 'Linux' and of size 512 MiB.
Command (m for help): w # Save and exit
The partition table has been altered.
Syncing disks.
# Create volume group and logical volume
[root@node2 ~]# vgcreate -s 16M myvg /dev/vdb4
[root@node2 ~]# lvcreate -l 50 -n mylv myvg
# Install vfat support
[root@node2 ~]# yum provides */mkfs.vfat
[root@node2 ~]# yum -y install dosfstools
# Format the logical volume with vfat filesystem
[root@node2 ~]# mkfs.vfat /dev/myvg/mylv
# Create mount point
[root@node2 ~]# mkdir /mnt/mydata
# Update /etc/fstab for automatic mounting
[root@node2 ~]# vim /etc/fstab
/dev/myvg/mylv /mnt/mydata vfat defaults 0 0
# Mount the logical volume
[root@node2 ~]# mount -a

Correct Answer:

See the solution below in Explanation.
Explanation:
Solution:
echo "umask 0277" > > /home/natasha/.bash_profile
Detailed Explanation:
* A umask of 0277 removes group and other permissions entirely.
* New files: base 666 minus mask 277 gives 400.
* New directories: base 777 minus mask 277 gives 500.
* Putting it in .bash_profile applies it for that user's login shell.