sca_sles15 Sample Questions Answers

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

To access updates for SLE, you need an account with SUSE Customer Center and a SLE Product Key. SUSE Customer Center is a web portal that allows you to manage your subscriptions, products, and services from SUSE. A SLE Product Key is a unique code that activates your subscription and entitles you to receive updates and support for your SLE product. You can register your product key with your SUSE Customer Center account and assign it to your system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-registration.html

Log file rotation is the process of compressing or deleting old log files to save disk space and improve performance. The /etc/logrotate.conf file controls the global settings for log file rotation, such as frequency, size limit, compression method, etc. The /etc/logrotate.d/ directory contains configuration files for specific log files that can override the global settings in /etc/logrotate.conf. The /usr/sbin/logrotate program is used to perform log file rotation according to the configuration files. It is usually invoked by a cron job in /etc/cron.daily/logrotate. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-logrotate.html

The file that contains the ntp configuration is /etc/ntp.conf. This file specifies the ntp server or peer addresses, synchronization options, access restrictions, logging settings, and other parameters for the ntp daemon (ntpd) that provides time synchronization services on a Linux system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-ntp-config.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 /mnt directory is traditionally used as a catch all to mount local and/or remote file systems. It is a generic mount point for temporary mounts by the system administrator. It may contain subdirectories for different types of file systems or devices, such as /mnt/cdrom, /mnt/usb, /mnt/nfs, etc. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-storage-mounting.html#sec-storage-mounting-mnt

SUSE Linux Enterprise Server supports two different kinds of VNC sessions: One-time sessions that “live” as long as the VNC connection from the client is kept up, and persistent sessions that “live” until they are explicitly terminated.

5.1 One-time VNC Sessions

5.2 Persistent VNC Sessions

https://documentation.suse.com/sles/11-SP4/html/SLES-all/cha-vnc.html#:~:text=SUSE%20Linux%20Enterprise%20Server%20supports,until%20they%20are%20explicitly%20terminated .

To restrict access to your server via SSH to just a few specific users, you need to modify the AllowUsers option in the /etc/ssh/sshd_config file. This option specifies a list of user names or patterns that are allowed to log in via SSH. Any user name that does not match the list will be denied access. You need to restart the sshd service for the changes to take effect. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-ssh-server.html#sec-ssh-server-config

The command that will take a foreground process and suspend it, and then place it in the background as a stopped job is Ctrl+Z. This keyboard shortcut will send a SIGTSTP signal to the foreground process group, which will stop its execution and return control to the shell. The shell will then display the job number and status of the stopped process. To resume the process in the background, you can use the bg command with the job number or % sign. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-jobs.html

If you want to define alias commands so that each time you open a terminal window those aliases are available from the command prompt, you should create a file named -/.alias and put your alias commands in that file. The -/.alias file is one of the files that are sourced by the bash shell when it starts. It can contain alias definitions and other customizations for your shellenvironment. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-startup

If the file1.txt file already exists in your home directory, the touch -7file1.txt command will change the access and modification times of the existing file1.txt file. The touch command can be used to create new empty files or update the timestamps of existing files. The -7 option specifies that only one timestamp should be changed instead of both. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-touch.html

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 /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 commands that could be used to determine the proper syntax for the cp command are man cp, cp --help, and info cp. These commands will display the manual page, help message, or info page for the cp command, respectively. They will provide information about the usage, options, arguments, examples, and other details of the cp command. The other commands are either invalid or unrelated to cp. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-help.html

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 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 ip route show or ip r s commands will display the routing table on a Linux system. The routing table contains information about how to reach different network destinations. The cat /etc/sysconfig/routes command will display the static routes configuration file, which may not reflect the current routing table. The other commands are either invalid or unrelated to routing. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-network-routing.html

https://documentation.suse.com/sles/12-SP4/html/SLES-all/cha-grub2.html

To add two new custom items to the GRUB2 boot menu, you should modify the /boot/grub2/custom.cfg file. This file can contain custom menu entries that will be added to the end of the GRUB2 menu. The syntax and format of this file are similar to /boot/grub2/grub.cfg file. You do not need to run grub2-mkconfig after modifying this file. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-grub2-custom.html