I NEED HELP!!!!!! DCOM 224 A new systems administrator has a quest.docx

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I NEED HELP!!!!!! DCOM 224 A new systems administrator has a question concerning the processes involved with server computers. The systems administrator is looking for guidance on which kind of system processes are interactive, operate in the background, and allow users to interact with them. Which of the following provides the systems administrator with the solution? Daemons Services SSHD NTPD What clocks does the timedatectl command expose? (Choose all that apply) Localization The local clock The Universal Time The hardware clock Question 3 (Mandatory) (1 point) A Linux systems administrator is identifying system processes that are noninteractive, operate in the background, and do NOT allow users to interact with them. Which system processes is the systems administrator identifying? NTP SSH Daemons Services An administrator is configuring systems and wants to connect remotely to a server for administration purposes. Which service should the administrator use? SSH service HTTP service NTP service NFS service Question 5 (Mandatory) (1 point) An administrator is configuring systems and wants to synchronize time among network servers. Which service should the administrator use? NFS service Web service SSH service NTP service What is the process that begins when the kernel first loads? Service management System initialization Environment variables Runlevels Question 7 (Mandatory) (1 point) What modern software suite provides an init method for initializing a system? systemd systemctl hostnamectl SysVinit The print management system for Linux, which enables a computer to function as a print server, is known as what? NFS CUPS NTP SFTP Cron jobs are very flexible and can schedule tasks for practically any time. For example, when is the following task scheduled to execute? 10211 0 / path/to/command 10:21 P.M. every Tuesday 10:21 A.M. on the 21st day of the month 9:21 A.M. on October 1st 9:10 P.M. on the 10th day of the month A Linux systems administrator is helping employees from another country configure their workstations. The employees want to adapt system components for use with the English language. What type of process is the system administrator helping the employees adapt? Culture specificity Language alternatives Localization Locale settings .

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Week 11 Linux Internals Processes, scheduling Lecture organization Kernel Structure Process structure Process creation Signals Process management, scheduling Linux for embedded systems References Linux Internals (to the power of -1) Simone Demblon, Sebastian Spitzner http://www.tutorialized.com/view/tutorial/Linux-kernel-internals-from-Process-Birth-to-Death/40955 Linux Knowledge Base and Tutorial http://linux-tutorial.info/modules.php?name=MContent&pageid=224 Inside the Linux scheduler IBM Developer Works http://www.ibm.com/developerworks/linux/library/l-scheduler/ The Linux Kernel A Unix kernel fulfills 4 main management tasks: • Memory management • Process management • File system management • IO management For our study of real time implications, we will examine Process management A Rather brief look at the kernel Part 1 Process structure Process data structure A process is represented by a rather large structure called task_struct. It contains all of the necessary data to represent the process, along with data for accounting and to maintain relationships with other processes (parents and children). The actual structure of the task_struct is many pages long A short sample of task_struct is shown in the next slide Task_struct Pointers to open files Memory map Signals: received, masked Register contents Everything defining the state of the computation Task_struct detail The sample contains the state of execution, a stack, a set of flags, the parent process, the thread of execution (of which there can be many), and open files. The state variable: the state of the task. Typical states: the process is running In a run queue about to be running (TASK_RUNNING), sleeping (TASK_INTERRUPTIBLE), sleeping but unable to be woken up (TASK_UNINTERRUPTIBLE), stopped (TASK_STOPPED), or a few others. Flags: the process is being created (PF_STARTING) or exiting (PF_EXITING), or currently allocating memory (PF_MEMALLOC). The comm (command) field: the name of the executable Priority: (called static_prio). The actual priority is determined dynamically based on loading and other factors. More Task_struct The tasks field is a linked-list mm and active_mm fields The process's address space. mm represents the process's memory descriptors, while the active_mm is the previous process's memory descriptors The thread_struct identifies the stored state of the process: The CPU state (hardware registers, program counter, etc.). Part 2 Process creation System call functions user-space tasks and kernel tasks, rely on a function called do_fork to create the new process. In the case of creating a kernel thread, the kernel calls a function called kernel_thread In user-space, a program calls fork, which results in a system call to the kernel function called sys_fork The function relationships are shown graphically in the next slide. Function hierarchy for process creation do_fork The do_fork f.

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[Digital Skola – Learning Progress Review – Week 3] The relationship between data engineer and networking, Data Engineers necessary to understand how communication between machines occurs on a data platform, how it enters a network and leaves a network. At the Linux-Unix and System Administration part, we learn CRON, a time-based job scheduler that has a particular notation to mark when specific jobs need to be executed. Data engineers must understand how to automate tasks. Many tasks you need to perform on your data may be tedious or may need to happen frequently. For example, you might want to clean up a table in your database on an hourly schedule. The last is Docker, Docker is an open-source platform, where we can automate our project deployment, software application deployment and we can deploy any of our trained deep learning, machine learning models inside CONTAINERS which not only makes it easier for production but also it adds automation and abstraction. Docker allows developers to super easily deploy their desired applications or models using containers, so that they can run on the host machine or localhost. It bundles entire dependencies, requirements of an application in a uniform structure. These features make it easy for production as well as enables systematic usage of the resources. To better understand please see my attachment below. #DataEngineer #DigitalSkola #BootcampDataEngineer #SkolaClassDataEngineer #DataEngineering

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