Lab 2-1 work with tty

Lab 3.1: Forms. Module 3: Create model-driven apps in Power Apps. Lab 3.2: Views. Module 3: Create model-driven apps in Power Apps. Lab 3.3: Dashboards. Module 4: Create canvas apps in Power Apps. Lab 4.1: Enhance a canvas app. Module 5: Make portals in Power Pages. Lab 5.1: Build a Power Pages portal.

Edgenuity Answer Key! Dm is preferable! I'm remaking this, so it'll be more coherent. I've been adding the answer key to my World History and Biology course. I made this because I was having to do all the research and I would've loved it, if someone had already done this. So, now that it's made, I hope it helps a lot of people to get work done ... University of California, Berkeley2.2.1.6 Multiple inheritance — the LAB Lab Now. 2.2.1.7 Inheritance and polymorphism — Inheritance as a pillar of OOP. 2.2.1.8 Inheritance and polymorphism — two pillars of OOP combined. 2.2.1.9 Inheritance and polymorphism — duck typing. 2.2.1.10 Inheritance and polymorphism — polymorpshism.Wearable Devices: Lab 2-1 1. Start Word. Create a new Word Document. 2. Modify the Normal Style to 12 point Times New Roman, Double space, remove space below (after) paragraphs. 3. Create a header with student last name, page number. 4. Type the name and course information at the left margin. Center and type the title. 5.Part 1: Prepare a Host Computer for Virtualization In Part 1, you will download and install desktop virtualization software, and also download an image file that can be used to complete labs throughout the course. For this lab, the virtual machine is running Linux. Step 1: Download and install VirtualBox. Lab 1-5: Introduction to USRP and UHD - Ettus Research. This tutorial guides you through the basics of using the Ettus Research Universal Software Radio Peripheral (USRP) devices with the UHD driver. You will learn how to configure and stream data from the device, as well as perform some basic signal processing tasks.There are a couple of options. You can use the --device flag that use can use to access USB devices without --privileged mode: docker run -t -i --device=/dev/ttyUSB0 ubuntu bash. Alternatively, assuming your USB device is available with drivers working, etc. on the host in /dev/bus/usb, you can mount this in the container using privileged mode ...Make or receive RTT/TTY phone calls. Select your contact and tap their phone number. Select RTT/TTY or RTT/TTY Relay. Wait for the call to connect, then select RTT/TTY. Enter your message. If you turn on Send Immediately in Settings, your recipient sees your message as you type. If not, enter your message, then tap the Send button to send.

Usage. The tty command is commonly used to check if the output medium is a terminal. The command prints the file name of the terminal connected to standard input. If no file is detected (in case, it's being run as part of a script or the command is being piped) " not a tty " is printed to stdout and the command exits with an exit status of 1. We also seek to define mechanisms of somatosensory system development and dysfunction of somatosensory circuitry in disease states. The Ginty lab uses molecular genetics, anatomy, physiology, and systems neurobiology approaches to understand the somatosensory neurons and central nervous system circuits that underlie our sense of touch. Jun 8, 2013 · If it did, as a result of redirecting 1 to /dev/null, the code 2>&1 >/dev/null would give the pointer chain 2 -> 1 -> /dev/null, and thus the code would generate nothing, in contrast to what we saw above. From section 3.6.4 here, we see that we can use the operator &> to redirect both stdout and stderr. Jan 29, 2021 · Background / Scenario. In this lab, you review basic Linux skills including command navigation, file management, regular expressions, and system administration. This lab is not meant as a substitute for prior Linux experience and does not necessarily cover all the Linux skills you need for this course. However, this lab should serve as a good ... CSE444 Lab 2: SimpleDB Operators. Assigned: Tuesday, April 10, 2012 Part 1 Due: Wednesday, April 18, 2012 Due: Wednesday, April 25, 2012. Version History: 4/10/12 : Initial version For Part 1 of the lab, please submit your solutions for the following exercises to the dropbox. Exercise 1 (Section 2.1) Exercise 2 (Section 2.2) Exercise 5 (Section ...We would like to show you a description here but the site won’t allow us.

Starting from SEED Labs 2.0, all the labs based on Ubuntu 20.04 can be conducted using one virtual machine on the cloud. The minimal configuration is 1 CPU and 2 GB of memory. Setup: Setting up the SEED VM on the cloud is not complicated. It involves two major steps: (1) create a VM instance on the cloud; (2) install software packages and ...Today in Linux, the tty is a legacy name used to refer to the user interface for text-based input and output, otherwise known as a "terminal". In Linux systems, there can be multiple tty device "consoles", to support potentially dozens of serial ports or more. tty0 is the current one in use, but Linux allows you to switch to another session by ...1. Yes you can. You can use a terminal and then in each terminal use this command. monitor 1 terminal. screen /dev/tty1. monitor 2 terminal. screen /dev/tty2. Share. Improve this answer.University of California, Berkeley5: Creating a directory. Find a command on the “Linux Commands” page that will let you make a new directory, and then make a new directory called lab2 within your current directory. If you have any difficulty doing this, please ask the instructor, class mentor, or a colleague for help.

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1/12/14 BIO 181 Lab assignment 2 1/7 1/3 submissions Current Score : 25.5 / 28 Due : Sunday, September 1 2013 11:59 PM EDT 1. 1/1 points Indicate whether you chose a frog or a toad as your species for study and write its scientific name. I chose a frog, the Bullfrog. Rana Catesbeiana is its scientific name. Let’s see a real-world example by booting into Linux and logging in at the text terminal and checking our current TTY and its process tree: baeldung login: user Password: $ tty /dev/tty1 $ ps -H -t /dev/tty1 PID TTY CMD 166 tty1 login 167 tty1 bash. Now, we can do a test exiting the shell, bash, PID 167:In today’s fast-paced world, convenience and efficiency are key factors that drive consumer choices. This is especially true when it comes to healthcare services, such as laboratory testing. Gone are the days of waiting in long queues at Qu...Access to this telecommunications device, also called a “TTY” or “TDD,” meant deaf people could place a phone call to a friend, a club, or anyone who also had a TTY. Before TTYs, deaf people had to go in person to see if friends were home, make appointments, or do any of the things hearing people did effortlessly by phone.The Ticket to Work program provides Social Security disability beneficiaries who want to work with access to free employment support services via Ticket to Work service providers. ... Contact the Help Line at 1-866-968-7842 or 1-866-833-2967 (TTY) M-F 8 a.m. - 8 p.m. ET, or Send Us an Email Message. WISE Webinar. Wednesday, October 25 3:00 ...5: Creating a directory. Find a command on the “Linux Commands” page that will let you make a new directory, and then make a new directory called lab2 within your current directory. If you have any difficulty doing this, please ask the instructor, class mentor, or a colleague for help.

If you’re in the market for a stunning diamond ring but don’t want to break the bank, lab created diamond rings are an excellent option to consider. These diamonds offer the same beauty and brilliance as their natural counterparts, but at a...6)past that URL in step 2 location. 7)I also remove C:\Users(profile)\AppData\Local\GitCredentialManager\tenant.cache file [added later] it works at least for me. Side note : anyone know why that url prefix with site created user name instead of my user name ?Press the Ctrl and c keys simultaneously to cancel the command and return to an empty command prompt. Using Is Command In this hands-on project, you examine files and file types using the Is and file commands. 1. Switch to a command-line terminal (tty3) by pressing Ctrl+Alt+F3 and log in to the terminal using the user name of the root. 2.Saved searches Use saved searches to filter your results more quicklyLab 2 1 Work With Tty June 26, 2023 Question: How many TTY consoles are available in CentOS? Answer: 6 Question: Which value along with the pkill command will kill a TTY connection forcefully? Answer: 9 Question: Which command helps you check the current TTY console? Answer: ttyNENA: The 9-1-1 Association improves 9-1-1 through research, standards development, training, education, outreach, and advocacy. Our vision is a public made safer and more secure through universally-available state-of-the-art 9-1-1 systems and better-trained 9-1-1 professionals. Learn more at nena.org. Document TerminologyBy default, Ubuntu has 7 tty's. On Ubuntu 17.10 and newer: It's GUI login screen on 1, GUI desktop on 2 and command lines on 3-7. Up until Ubuntu 17.10: 1-6 are command line only and 7 runs your X session (your normal desktop). To access them, use this keyboard shortcut: Ctrl + Alt + F3 (or F1 until 17.10).For me, pinentry-tty didn't work but pinentry-curses did, just replace tty with curses in both the steps above. – Terry Brown. Nov 28, 2021 at 16:00. Add a comment | ... Thanks a lot, and +1. Worked for me immediately in debian Buster, and probably saved a lot of time and hassle compared to the other solutions. – Binarus. Jun 5 at 10:51.1/12/14 BIO 181 Lab assignment 2 1/7 1/3 submissions Current Score : 25.5 / 28 Due : Sunday, September 1 2013 11:59 PM EDT 1. 1/1 points Indicate whether you chose a frog or a toad as your species for study and write its scientific name. I chose a frog, the Bullfrog. Rana Catesbeiana is its scientific name. This form of the command lists a number of statistics for each active process. Output from this command looks similar to the following: PID TTY STAT TIME PGIN SIZE RSS LIM TSIZ TRS %CPU %MEM COMMAND 0 - A 0:44 7 8 8 xx 0 0 0.0 0.0 swapper 1 - A 1:29 518 244 140 xx 21 24 0.1 1.0 /etc/init 771 - A 1:22 0 16 16 xx 0 0 0.0 0.0 kproc 1028 - A 0:00 10 16 …

PTY is an acronym for pseudo-TTY. The name PTY stems from the fact that it behaves like a TTY but for any two endpoints. This minor difference enables multiple PTYs to co-exist within the context of the same TTY. In fact, both sides of a PTY have a name: slave, /dev/pts, represented by a file in /dev/pts/#.

When it comes to ensuring the quality and safety of products, ASTM testing labs play a crucial role. These labs are responsible for conducting tests that meet the standards set by the American Society for Testing and Materials (ASTM).In the event of an emergency, TTY users should call 911 directly and not make a TTY-based TRS call via 711. Other forms of TRS. 711 dialing access does not work for Video Relay Service (VRS), Internet Protocol Relay (IP Relay), or IP Captioned Telephone Service (IP CTS) calls, because such calls are initiated through the Internet.@dbr cmd 2>&1 >>file does not redirect stderr to the file, but cmd >> file 2>&1 does. Order matters. In the first case, stderr is redirected to the stdout of the shell (possibly a tty if the command is entered interactively), and then stdout is directed to the file. What is a tty and how do I use it? I've been asked this question a few times in recent weeks, so I thought I would make a brief video discussing this.REFERE... If you’ve scheduled an appointment at Alberta Precision Labs, you’re taking a proactive step towards managing your health. Whether it’s for routine blood work or a specific test, it’s important to prepare for your appointment to ensure the ...The Raspberry Pi is a single board computer with now 4 revisions and a minimalistic zero variant. It is a popular choice for different projects because of its small size, efficient power ...Apr 6, 2017 · Below worked for me for Docker 1.13 ( Rhel-7.8 ): Create a file with your password / ECR key; use command docker login --username AWS -p 'cat /data/user/ecr/key' registry-url.amazonaws.com; Note: In step 2 please replace ' with ` while using the command As administrators you can expect to need to stop processes, suspend them or change their priority. In this lab exercise you will look at tools and commands for controlling the processes on a system, as well as developing an understanding of good and bad) practices in process control. 1. WINDOWS 10 O Boot up your virtual Windows 10 system.We would like to show you a description here but the site won’t allow us.Jun 26, 2023 · Lab 2 1 Work With Tty June 26, 2023 Question: How many TTY consoles are available in CentOS? Answer: 6 Question: Which value along with the pkill command will kill a TTY connection forcefully? Answer: 9 Question: Which command helps you check the current TTY console? Answer: tty

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What is a tty and how do I use it? I've been asked this question a few times in recent weeks, so I thought I would make a brief video discussing this.REFERE...11. Yes, the origin of TTY in Unix is from teletypewriter. The tele in telephone, teletypewriter, etc comes from a Greek root meaning far or distant. TTY's provide a virtual interface similar to what the physical machines provided. This is the origin of the 80 char width and the carriage return and linefeed codes. – chaskes.can be used to complete labs throughout the course. For this lab, the virtual machine is running Linux. Step 1: Download and install VirtualBox. VMware Player and Oracle VirtualBox are two virtualization programs that you can download and install to support the image file. In this lab, you will use VirtualBox. a.Teleprinter. Example of teleprinter art: a portrait of Dag Hammarskjöld, 1962. A teleprinter ( teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations. Diamonds have always been considered one of the most valuable and sought after gemstones in the world. However, with the recent advancements in technology, lab grown diamonds have become a popular alternative to natural diamonds.If your business or organization has a TTY, learn how to operate the device. To make a TTY call: 1. Push the “ON” switch. 2. Push the DISPLAY switch if you wish to use the screen alone, or the PRINT switch if you want what is typed both on screen and in print. 3. Place the telephone receiver on the TTY's rubber receptacles. Make sure that theANSC 422 Lecture 2 - Dr. Kleinman; ANSC 422 Lecture 1 - Dr. Kleinman; SEC-502-RS-Dispositions Self-Assessment Survey T3 (1) Techniques DE Separation ET Analyse EN Biochimi 1; C799 Task 2 - Task 2 paper; C799 Task 1 - Task 1 paper; Midterm Exam-2 Guide; ISO 9001 2015 Checklist; STI Chart SP2019 TTY:(800) 662-1220 or 711 [email protected]. Regional Offices. Albany, NY 20 Corporate Woods Blvd Albany, NY 12211-2370 Phone: (518) 426-3300 ... We are happy to speak to members of the media about the work we do to improve the quality of healthcare across the nation. Who We Are. About Us. Accreditations and Memberships; IPRO Team; …Select the instance and choose Actions, Monitor and troubleshoot, EC2 Serial Console , Connect. Alternatively, select the instance and choose Connect , EC2 Serial Console, Connect. An in-browser terminal window opens. Press Enter. If a login prompt returns, you are connected to the serial console.So when I operate according to instructions I noticed 2 problems. It rose to green making me think it passed (It did not) I have my script in with my PAT From Github as directed in docs. its main problem is "Cannot prompt because user interactivity has been disabled." What am I doing wrong? Starter pipelineBitvise SSH Client. Bitvise SSH Client is an SSH and SFTP client for Windows. It is developed and supported professionally by Bitvise. The SSH Client is robust, easy to install, easy to use, and supports all features supported by PuTTY, as well as the following: an FTP-to-SFTP protocol bridge. Bitvise SSH Client is free to use.Let's get started with some basic examples of using socat for various connections. 1. Connect to TCP port 80 on the local or remote system: # socat - TCP4:www.example.com:80. In this case, socat transfers data between STDIO (-) and a TCP4 connection to port 80 on a host named www.example.com. 2. ….

Diamonds have always been considered one of the most valuable and sought after gemstones in the world. However, with the recent advancements in technology, lab grown diamonds have become a popular alternative to natural diamonds.FAQS and General TTY Etiquette Tips for New TTY Users. Some of the tips suggested are similar to new E-mail users, which many more Deaf and Hard-of-Hearing persons are using in favor of the TTY. More and more Deaf and HH (Hard of Hearing) users are opting for wireless messaging pager systems which allows the user to send and …When it comes to ensuring the quality and safety of products, ASTM testing labs play a crucial role. These labs are responsible for conducting tests that meet the standards set by the American Society for Testing and Materials (ASTM).For general information about Telecommunications Relay Services (TRS), visit the TRS page. TTY-based TRS involves the use of Text Telephones (TTYs). TTYs use keyboards for typing messages and screens for displaying messages. The text is read on either (or both) a display screen or a paper printout. TTYs connect to a standard phone line.Lab 2 1 Work With Tty June 26, 2023 Question: How many TTY consoles are available in CentOS? Answer: 6 Question: Which value along with the pkill command will kill a TTY connection forcefully? Answer: 9 Question: Which command helps you check the current TTY console? Answer: ttyThis is the major/minor node. These can be searched in the /dev directory to get user-friendly names: # ll -R /dev |grep "188, *0" crw-rw---- 1 root dialout 188, 0 2012-03-28 20:44 ttyUSB0. The /sys/class/tty dir contains all TTY devices but you might want to exclude those pesky virtual terminals and pseudo terminals.Miniprint 425 TDD. The acoustic coupler on the top is for use with telephone handsets. The printer records the conversation. The specific GA and SK keys allow for speedier use of common abbreviations.. A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for …tty Other than the tty command, which command reveals the name of the current TTY console? ps You can control the use of TTY consoles using the _ /etc/systemd/logind.conf Chemistry labs are essential for conducting experiments, analyzing data, and advancing scientific research. To ensure accurate results and efficient workflow, it is crucial to have the right equipment. Lab 2-1 work with tty, Lab 1-5: Introduction to USRP and UHD - Ettus Research. This tutorial guides you through the basics of using the Ettus Research Universal Software Radio Peripheral (USRP) devices with the UHD driver. You will learn how to configure and stream data from the device, as well as perform some basic signal processing tasks. , 2022 ж. 01 ақп. ... Be aware, your participating provider might use a non-participating provider for some services (such as lab work). ... T T Y : 711 '1 ,uru-2 1"1., 1/12/14 BIO 181 Lab assignment 2 3. 4/4 points Write a short essay about your amphibian species that indicates: 1) the states in which malformations have been most frequently reported 2) the types of malformations reported Malformations have been spotted all over the US and in approximately 46 of the states., When administering a home machine, the user must perform some tasks as the root user or by acquiring effective root privileges using a setuid program, such as sudo or su.A setuid program is one that operates with the user ID (UID) of the program's owner rather than the user operating the program.Such programs are denoted by an s in the …, Wearable Devices: Lab 2-1 1. Start Word. Create a new Word Document. 2. Modify the Normal Style to 12 point Times New Roman, Double space, remove space below (after) paragraphs. 3. Create a header with student last name, page number. 4. Type the name and course information at the left margin. Center and type the title. 5. , Aureus Medical Group - Lab Job ID #869-23-2490509. Pay package is based on 8 hour shifts and 40 hours per week (subject to confirmation) with tax-free stipend amount to be determined. Posted job title: BLOOD BANK SPECIALIST. About Aureus Medical Group - Lab. Rewarding Careers. Experiences of a Lifetime., To enable and disable TTYs, perform the following steps: Step 1 On the desktop, right-click and selectOpen Terminal. Figure 1.4 Screenshot of CENTOS: Selecting the Open Terminal option from the context menu. Step 2 The terminal window is displayed. You can check the active TTY connections. Type the following command: w PressEnter., Õppematerjalide varalised autoriõigused kuuluvad Tartu Ülikoolile. Õppematerjalide kasutamine on lubatud autoriõiguse seaduses ettenähtud teose vaba kasutamise eesmärkidel ja tingimustel. Õppematerjalide kasutamisel on kasutaja kohustatud viitama õppematerjalide autorile. , Thursday, April 21, 2022. Real-time text (RTT) allows text to be transmitted instantly as it is typed or created over Internet protocol (IP) networks. RTT is intended to replace text-telephone (TTY) technology as communications networks migrate to IP-based environments for people with disabilities who rely on text communications., TutorialLaboratory. Exercises . ExercisesSample Solutions (tutors only) Week 01. Laboratory. Exercises. Objectives. to refamiliarise yourself with C. to practice …, Lab 2: Managing Linux Processes Exercise 1: In this exercise, you view characteristics of processes using the ps command. 1. Boot your Centos Linux virtual machine. After your Linux system has been loaded, switch to a command-line terminal (tty5) by pressing Ctrl+Alt+F5 and log in to the terminal using the user name of root and the password of 123456. , At first run of MTPuTTY, it may prompt you to specify the full path to PuTTY utility. Input the path into PuTTY location line (e.g. C:\NetUtils\putty.exe). Then the main MTPuTTY window will appear. The left pane of the main window lists servers you will connect to. To add a new connection, select Servers->Add server from the main menu., Lab 2: Managing Linux Processes Exercise 1: In this exercise, you view characteristics of processes using the ps command. 1. Boot your Centos Linux virtual machine. After your Linux system has been loaded, switch to a command-line terminal (tty5) by pressing Ctrl+Alt+F5 and log in to the terminal using the user name of root and the password of 123456. , The general solution of the equation tyy'=1-2 for t > 0, can be written as A. y=2 In (t) – + + B. y=AVC+2 In (t) — 12 C. y=+V2 In (t) – +2+C D. y=In (t2) +t+C +2 E. y= ln (e) – +0 = 6 2 …, 5: Creating a directory. Find a command on the “Linux Commands” page that will let you make a new directory, and then make a new directory called lab2 within your current directory. If you have any difficulty doing this, please ask the instructor, class mentor, or a colleague for help., tty Other than the tty command, which command reveals the name of the current TTY console? ps You can control the use of TTY consoles using the _ /etc/systemd/logind.conf , so if i just want to implement command (g3-from-scratch.csh tpall.fna from-scratch) in python. This command will create some files in current directory but give not reply in console, i test this command in shell,it work. how could i implement it in python?originally,i use os.system(),but it just return (sh: 1: g3-from-scratch.csh: not found), 6)past that URL in step 2 location. 7)I also remove C:\Users(profile)\AppData\Local\GitCredentialManager\tenant.cache file [added later] it works at least for me. Side note : anyone know why that url prefix with site created user name instead of my user name ?, There are a couple of options. You can use the --device flag that use can use to access USB devices without --privileged mode: docker run -t -i --device=/dev/ttyUSB0 ubuntu bash. Alternatively, assuming your USB device is available with drivers working, etc. on the host in /dev/bus/usb, you can mount this in the container using privileged mode ..., Apr 5, 2023 · You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. , Running your script. Run wandb login from your terminal to signup or authenticate your machine (we store your api key in ~/.netrc). You can also set the WANDB_API_KEY environment variable with a key from your settings. Run your script with python my_script.py and all metadata will be synced to the cloud. You will see a url in …, Õppematerjalide varalised autoriõigused kuuluvad Tartu Ülikoolile. Õppematerjalide kasutamine on lubatud autoriõiguse seaduses ettenähtud teose vaba kasutamise eesmärkidel ja tingimustel. Õppematerjalide kasutamisel on kasutaja kohustatud viitama õppematerjalide autorile. , One of the most exciting things as an ethical hacker, in my opinion, is catching a reverse shell. But often, these shells are limited, lacking the full power and functionality of a proper terminal. Certain things don't work in these environments, and they can be troublesome to work with. Luckily, with a few commands, we can upgrade to a fully …, We also seek to define mechanisms of somatosensory system development and dysfunction of somatosensory circuitry in disease states. The Ginty lab uses molecular genetics, anatomy, physiology, and systems neurobiology approaches to understand the somatosensory neurons and central nervous system circuits that underlie our sense of …, Study with Quizlet and memorize flashcards containing terms like How many TTY consoles are available in CentOS?, Which value along with the pkill command will kill a TTY …, Bitvise SSH Client. Bitvise SSH Client is an SSH and SFTP client for Windows. It is developed and supported professionally by Bitvise. The SSH Client is robust, easy to install, easy to use, and supports all features supported by PuTTY, as well as the following: an FTP-to-SFTP protocol bridge. Bitvise SSH Client is free to use., Press the Ctrl and c keys simultaneously to cancel the command and return to an empty command prompt. Using Is Command In this hands-on project, you examine files and file types using the Is and file commands. 1. Switch to a command-line terminal (tty3) by pressing Ctrl+Alt+F3 and log in to the terminal using the user name of the root. 2., A TTY is a teletypewriter, a terminal type device with a keyboard and display and optionally a printer used by deaf, hearing impaired and speech impaired people to communicate via telephone lines. The device can be connected to telephone lines via an acoustic coupler or by direct connect. The device may also be set up on the …, Usage. The tty command is commonly used to check if the output medium is a terminal. The command prints the file name of the terminal connected to standard input. If no file is detected (in case, it's being run as part of a script or the command is being piped) " not a tty " is printed to stdout and the command exits with an exit status of 1. , When you switch virtual consoles, they're labeled with the TTY number, going from one to seven, such as "tty1" for the first virtual console. ... Now you know how Linux virtual consoles work. Linux still uses the command line for so many operations. You may be wondering why it is so. A lot of it is due to Linux's Unix heritage., Lab Exercises Curriculum Lab 1-1: Connecting Console Interfaces (1.2.5) Curriculum Lab 1-2: Connecting Router LAN Interfaces (1.2.6) Curriculum Lab 1-3: Connecting WAN Interfaces (1.2.7) Challenge Lab 1-4: Build a Two Router Topology CHAPTER 2 Introduction to Routers Study Guide Cisco IOS and the IOS Command Line Interface , Some possible sources of errors in the lab includes instrumental or observational errors. Environmental errors can also occur inside the lab. Instrumental errors can occur when the tools are not functioning exactly as they should be., 5: Creating a directory. Find a command on the “Linux Commands” page that will let you make a new directory, and then make a new directory called lab2 within your current directory. If you have any difficulty doing this, please ask the instructor, class mentor, or a colleague for help.