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.

Reference:

https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-logrotate.html

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.

Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-tune2fs.html

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/chavnc.html#:~:text=SUSE%20Linux%20Enterprise%20Server%20supports,until%20they%20are%20expli

citly%20terminated.

The types of files that are used for inter-process communications are pipe and socket files. Pipe files are used for unidirectional data flow between two processes. They can be created with the mkfifo command or with the | operator in a shell command. Socket files are used for bidirectional data exchange between processes on the same or different machines. They can be created with various system calls or commands depending on the protocol and domain. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-pipes.html https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-sockets.html

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.

The system initialization system used in SLES 15 is systemd. It is a modern and powerful system and

service manager that replaces the traditional init system. It provides faster boot times, better

dependency

handling,

parallelization,

and

more

features

and

capabilities.

Reference:

https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-systemd-basics.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. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/secvnc-security.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.

Reference:

https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-registration.html

When you launch yast2 without specifying a module name, the YaST Control Center appears. The

YaST Control Center is a graphical interface that allows you to access various YaST modules for system

administration and configuration tasks. You can browse through different categories of modules,

such as Software, Hardware, System, Network Services, etc., and launch them by clicking on their

icons.

Reference:

https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-yast.html#secyast-control-center

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.

Reference:

https://documentation.suse.com/sles/15SP3/html/SLES-all/cha-vim.html#sec-vim-multiple-files

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.

Reference:

https://documentation.suse.com/sles/15SP3/html/SLES-all/sec-boot-initrd.html