sca_sles15 SUSE Certified Administrator in Enterprise Linux 15 Questions and Answers

The option for zypper that will list the available patches is zypper lp. This command will display a table of patches that are applicable to your system but not yet installed. It will show the patch name, category, severity, summary, and status for each patch. You can use zypper patch to install all available patches or zypper patch-info to get more details about a specific patch. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-zypper.html#sec-zypper-patches

The statement that is true regarding the life cycle support for SUSE Linux platform products is that the support for SLE platforms has a 13 year life cycle: 10 years of general support and 3 years of extended support. General support includes security updates, bug fixes, feature enhancements, and technical support. Extended support includes security updates and technical support only. Service packs have a different life cycle depending on their release date and version. References:https://www.suse.com/lifecycle/

The command that is used to ensure an ext3 file system is checked every 50 times it is mounted is tune2fs. The tune2fs command can be used to adjust various parameters of an ext2, ext3, or ext4 file system. The -c option can be used to set the maximum number of mounts between two file system checks. For example, tune2fs -c 50 /dev/sda1 will set the check interval to 50 mounts for /dev/sda1. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-tune2fs.html

By default, the VNC Client and the VNC server daemon use a self-signed SSL certificate for secure communications. The VNC server generates a self-signed certificate when it is started for the first time. The VNC Client will prompt the user to accept or reject the certificate when connecting to the server. Alternatively, the user can provide a custom certificate for the VNC server or disable encryption if desired. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vnc-security.html

https://documentation.suse.com/sles/12-SP4/html/SLES-all/cha-security-acls.html

The three permissions available on posix file systems are read, write, and execute. The read permission allows the user to view the contents of a file or directory. The write permission allows the user to modify or delete a file or directory. The execute permission allows the user to run a file as a program or change into a directory. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-file-permissions.html#sec-file-permissions-types

The initrd file is an initial ramdisk image that contains the necessary drivers and tools to mount the root file system and start the boot process. It is usually located in the /boot directory along with the kernel image (vmlinuz). References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-boot-initrd.html

It is false that it is not possible to open more than one file in Vim without running a second instance. Vim supports multiple buffers, windows, and tabs that allow you to work with multiple files within one Vim session. You can use various commands and options to open, switch, split, close, and manipulate files in different ways. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-vim.html#sec-vim-multiple-files

The /etc/fstab file contains information about file systems that need to be mounted at boot time or on demand. It specifies the device name, mount point, file system type, mount options, dump frequency, and fsck order for each file system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-storage-mounting.html#sec-storage-mounting-fstab

The file that contains information about secondary groups on the system is /etc/group. This file defines the group names, group IDs, group passwords, and group members for each group on the system. The primary group information for each user is stored in /etc/passwd file. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-user-group.html#sec-user-group-files

The file that lists each user’s home directory and login shell is /etc/passwd. This file contains information about each user account on the system, such as user name, password (or an x if using shadow passwords), UID, GID, full name or comment field, home directory path, login shell path, etc. Each line in this file corresponds to one user account and has seven fields separated by colons. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-user-group.html#sec-user-group-files

To add additional physical volumes to an existing volume group, use the vgextend command. The vgextend command increases a volume group's capacity by adding one or more free physical volumes.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/4/html/cluster_logical_volume_manager/vg_grow#:~:text=To%20add%20additional%20physical%20volumes,or%20more%20free%20phys ical%20volumes.

The command that is used to add new physical volumes to an existing volume group is vgextend. This command will extend a volume group by adding one or more physical volumes to it. The physical volumes must be initialized with pvcreate before they can be added to a volume group. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-lvm-vgs.html#sec-lvm-vgs-add-pv

The command that you would run to create an updated initial file system, if your server hardware requires additional drivers to be available for the kernel at boot up, is mkinitrd. This command will create or update the initrd file in /boot based on the current kernel and configuration files. The initrd file is an initial ramdisk image that contains the necessary drivers and tools to mount the root file system and start the boot process. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-boot-initrd.html

The command and options to remove repository number 4 are zypper rr 4. This command will remove the repository with the alias or number 4 from the system. It will also delete anyassociated cache data and metadata. To list the repositories on the system, you can use zypper lr or zypper repos. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-zypper.html#sec-zypper-repos

You have just added a new directory to be exported via NFS. To make that directory available, you should run systemctl restart nfsserver.service. This command will restart the NFS server service and reload the /etc/exports file that contains the export definitions. References: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-nfs-server.html#sec-nfs-server-export

The basic components of RPM are RPM Database and RPM Package Manager. The RPM Database is a collection of files that store information about installed packages on the system. It is located in /var/lib/rpm by default. The RPM Package Manager is a set of tools and libraries that allow you to install, uninstall, query, verify, and manage RPM packages. It includes commands such as rpm, zypper, yast2, etc. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-rpm.html#sec-rpm-components

The commands that can display the groups of which a user is a member are groups and id. The groups command will print the names of all primary and secondary groups that a user belongs to. If no user name is specified, it will print the groups for the current user. The id command will print various information about a user’s identity, such as user ID (UID), group ID (GID), primary group name, secondary group names, etc. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-user-group.html#sec-user-group-display

The statement that is true regarding VFS is that VFS is an abstraction layer in the kernel that provides the same interface to applications and users regardless of which file system format is used. VFS stands for Virtual File System or Virtual File System Switch. It allows different types of file systems (such as ext4, xfs, nfs, etc.) to be accessed through a common set of system calls and functions. VFS also provides caching and buffering mechanisms to improveperformance and reliability. References: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vfs.html

The command that is used to manage software RAID is mdadm. This command can be used to create, assemble, monitor, and manage multiple device (md) arrays that provide RAID functionality. It can also be used to query and modify various parameters and settings of md arrays. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-raid.html#sec-raid-mdadm