Pass the SUSE SUSE Certified Administrator (SCA) in Enterprise Linux sca_sles15 Questions and answers with CertsForce

https://www.gnu.org/software/bash/manual/htm l_node/Bash-Startup-Files.html

When Bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The --noprofile option may be used when the shell is started to inhibit this behavior.

The first file executed by a bash login shell is /etc/profile. This file sets global environment variables and aliases for all users. It may also source other files in /etc/profile.d/ directory. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-startup

The term “action” means an action that defines where a log message ends up such as in a regular file or database table when referring to system logging in SUSE Linux Enterprise. An action is part of a rule that specifies how to process a log message based on its properties. An action can be one of the following types: file, pipe, shell, template, discard, stop, call, omusrmsg, ommysql, ompgsql, etc. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-syslog.html#sec-syslog-config-actions

The program systemd is the process with process ID 1. It is responsible for initializing the system in the required way. systemd is started directly by the kernel and resists signal 9, which normally terminates processes. All other programs are either started directly by systemd or by one of its child processes.

https://documentation.suse.com/sles/15-GA/html/SLES-all/cha-systemd.html

Systemd is the first process that is started by the kernel during boot. It has the process ID of 1. It is responsible for initializing and managing other processes and services on the system. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-systemd-basics.html#sec-systemd-intro

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 execute permission on a directory means you can use the cd command to change into the directory. It also means you can access the files and subdirectories inside the directory, if you have read permission on them. The execute permission does not affect the visibility or exportability of the directory. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-file-permissions.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

The two commands that are commonly used to compile and install from source code are ./configure and make install. The ./configure command will check the system for dependencies, set variables, and generate a Makefile. The make install command will use the Makefile to compile the source code and copy the binaries and files to the appropriate locations. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-software-install-source.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

https://en.wikipedia.org/wiki/Virtual_Network_Computing#:~:text=VNC%20by%20default%20uses%20TCP,Java%2Denabled%20 web%2Dbrowser.

VNC by default uses TCP port 5900+N,[6][7] where N is the display number (usually :0 for a physical display). Several implementations also start a basic HTTP server on port 5800+N to provide a VNC viewer as a Java applet, allowing easy connection through any Java-enabled web-browser. Differentport assignments can be used as long as both client and server are configured accordingly. A HTML5 VNC client implementation for modern browsers (no plugins required) exists too.[8]

The default port a VNC Client uses to connect is TCP 5901. This port corresponds to the first display number (:1) of the VNC server. Each display number has its own port number, starting from 5900. For example, display :2 uses port 5902, display :3 uses port 5903, and so on. The user can specify a different port number if needed. References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vnc-connect.html

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