Operating Systems

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Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.

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I have Linux laptop.  My OS is Ubuntu 18.04.  Please provide and explain utility for searching location of Math Library, libm.a
Is the name of library filename, libm.a
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Starting with Angular 5
LVL 13
Starting with Angular 5

Learn the essential features and functions of the popular JavaScript framework for building mobile, desktop and web applications.

I created hello world program in 'C' language in Linux Laptop.  My OS is Ubuntu version 18.04.
The name of the executable file is hello.  This file is in current directory.  

Why can't I run program by typing hello at the shell prompt?

Why do I need to type path of the executable:   ./hello
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I have an older Mac that I'm trying to refresh.  I'd like to buy a solid state drive and then install the OS again.  Is it like installing a new hard drive and OS on a PC?  What do I need to do and where do I get the OS?  Can I just keep the license from the previous OS somehow and install again?
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Any suggestions on what I can look at to solve this problem? Machine is Win7Pro and when I shut down last night, everything seemed normal. When I booted this morning, it said Windows didn't close properly or crashed or something I don't remember exactly what it said, but it "recommended" I let it try to Repair, so I did, but the repair couldn't fix anything, then eventually after I restarted, I got this message - notice is says "BlueScreen", but, I never saw a blue screen. The shut down last night seemed normal and upon boot up today, it immediately gave the "Launch Repair recommended" option.  Here is the message it gave later, when I restarted, after trying the Repair:

Problem signature:
  Problem Event Name:      BlueScreen
  OS Version:      6.1.7601.2.1.0.256.48
  Locale ID:      1033

Additional information about the problem:
  BCCode:      1000007e
  BCP1:      FFFFFFFFC0000005
  BCP2:      FFFFF88004AE93FA
  BCP3:      FFFFF880037D3B08
  BCP4:      FFFFF880037D3370
  OS Version:      6_1_7601
  Service Pack:      1_0
  Product:      256_1

Files that help describe the problem:
  C:\Windows\Minidump\062819-13416-01.dmp
  C:\Users\Joe\AppData\Local\Temp\WER-160727-0.sysdata.xml

Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt
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After joining a new computer to the Domain and logging the user in for the first time our FOLDERREDIR GPO ran and  synced the Pictures.

However, now when the user tries to open the Pictures we get this File System Error. Everything I am finding thru a Google Search say it is after a OS upgrade. ...but I cant find anything that tells me why joining a domain would cause this.

Any ideas how to fix this?
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After a chkdsk /r  customer's laptop drive finally booted (corrupted files and sectors).  When I logged in very little was working.  It seems that the Windows folder had been renamed to Found001......etc    most programs won't load and can't install anything.  No access to My Computer, Control Panel,  anything  - everything must be done through a command prompt
OS is Windows 7 Pro

Can I rename the folder back to Windows  

Any help would be appreciated
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what is the best and simplest to use program out there in order to do
a system image and a recovery disk?
thanks,
capreol
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Connect 3 monitors to Mac mini [late 2014] - OS X Mojave 10.14.5 only any 2 of 3 connected are active displays.

2 connections are Thunderbolt/VGA, other is HDMI/VGA.

I can have temporary access to Mac mini 2018 - will this solve 2 of 3 --->all 3 issue?
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My OS is win 7 enterprise 64 bits which I had for some time.  I am now getting the following showing at the bottom right corner of the screen, though doing nothing, but my Office 365's Outlook has to be loaded more than once, or in safe mode, then quitting then in normal mode.
Windows 7
Build 7601
This copy of windows is not genuine
What does the above message and how to remedy it.  Thank u and regards
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My OS is win 7 64 bit and I had been saving files in jpeg with commas (,) eg : "This is a test, now.jpeg"  While I encountered errors but whenever i boot or after some time, I get window errors,like asking me to activate, etc.  How do I do a global replace of the ","s with a "-" in all jpeg files.  what is the easiest method?  thank u n regards.
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OWASP: Avoiding Hacker Tricks
LVL 13
OWASP: Avoiding Hacker Tricks

Learn to build secure applications from the mindset of the hacker and avoid being exploited.

A little background information:

I am in the process of upgrading our BackUp Exec server and backups. We were on version 2012. We are upgrading to BackUp Exec 16. I built a new Windows Server, OS 2012r2 and installed the Backup Exec 16 software without an issues. I have a few physical servers that aren't VM host. I configure them. All are backing up without issue.

As for the VM Host and virtual machines, I'm wanting to use the new features so I can use file/folder-level Granular Recovery Technology (GRT). I'm just not sure how ro back up the VM's so I can do this and use Simple Disaster Recovery too. In other wordsCaptureVM.JPG, I want to be able to recover the whole VM and/or a file from that VM. What is the correct way to do this?

As so, when I configure the backup, when do I need to capture the Host Components? I have included a screenshot of what I'm trying to do. Just not sure if I need to have 2 backups, one for SDR and one for GRT.

Any advice or instruction on this matter would be greatly appreciated.

Regards,

ABBEadmin
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My OS is win 7 enterprise and I am using a Dell 6500 laptop 64 bit.  From time to time now I get a missing dll whenever I boot up.    tried to fix it using a dll-files client that I downloaded, but the problem persists.  the files are :: MSVCR100.dll or MSVCR120.dll.  Hope the Experts can please explain what is happening and how to remedy this.  My anti virus is Security Essentials and antimalwarebytes which is  out of date, and I did not update it,  as it conflicts with Security Essentials.  Thank u and regards.
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So I have a brand new server and a Server 2019 Datacenter license. Two small-ish drives working together in a RAID 1 will be for the OS. That will be formatted as NTFS and 2019 DC will be installed here with the Hyper-V role (and that's it!). Then ... I have 6 SSD drives working together in a RAID5 and the only things that will live on this drive are the actual Hyper-V VM files.

I've read about how ReFS has come a long way since it was released with 2012, yet when you format a data drive in Windows, NTFS is still the default. So I wanted to ask - who out there has embraced ReFS for Hyper-V? Should I keep it safe and stick with NTFS? Or should I use ReFS?

This drive will never be used for anything other than storing Hyper-V files.

Also: If I go with ReFS would there be any potential compatibility issues if, say, I had to migrate a VM from an older server (having only NTFS) to this new server (having only ReFS) or vice versa?
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What's the best tool to use to get a list of all the devices on a network?
What's the best tool to use to do a thorough report on an individual machine?  

In the past, I've used Belarc Advisor.  I still think it's great, but I'm wondering what other techs use.
https://www.belarc.com/products_belarc_advisor

Thanks
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Dear Team,

We have number of VMS which are having old OS 2008 R2 and need to upgrade to 2016 standard.

Scenario 1:
 I have an RDP server running on 2008R2 i want to upgrade to 2016 standard. Can you please share the best practice to achieve. I have the licenses.
Can i run the 2016 setup on the VM and upgrade.

My setup is on VMware Standard (HCI) version 6.7.
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Dear Team,

We have number of VMS which are having OS 2008 R2 and need to upgrade to 2016 standard.

Scenario :
I have 2 File Servers on 2008 R2 high Available using DFS. I want to upgarde the OS to windows 2016 Standard. Can you please share the best practice.

My setup is on VMware Standard (HCI) version 6.7.
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Dear Team,

We have number of VMS which are having old OS 2008 R2 and need to upgrade to 2016 standard.

Scenario 1:
 I have 2 Exchange Servers (Version 2013) running on Windows 2008 R2 . The servers which is high available using DAG.
I want to upgrade only the Operating system to windows 2016 standard. So please recommend the best practice to upgrade the OS.
Is it possible if i run the windows 2016 setup  on each server and upgrade ?

My setup is on VMware Satndard (HCI) version 6.7.
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Hello,

I have a Dell R620 with 3tb of disk on a Raid5.  When I try to install win 2012 .. it does not partition the disk properly.. Essentially I am trying to give os partitioin 400gb and rest needs to be on a single partition of 2.6TB.  I know its an issue with GPT.. I am not sure how to configure it so when I boot off the usb drive win 2012 setup installs it as a GPT.  

On the bios I have it setup as uefi.. not sure if it needs to be on bios.
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We are going to set up a new server to host our VM's. We use Hyper-v and will be using Windows server 2019. The host we have are not clustered. They are set up with the OS on the same hard drive partition are the VMs and configure Raid 6. This server will replace an older one. It will host 6 vm's one of which is a Domain Controller. The new server will be a HP Proliant DL380 Gen10 with 128 GB of RAM and 2 TB of usable space.

How it be better to put the OS on it's own hard drive? If so, should I set the OS hard drive to Raid 1? VM's Hard drive to Raid 5 or 6? This server is located local. I check the drive lights weekly. At what point do I need to up the number of NICs we use? The host servers have 4, we use 2.  

Please let me know if you need additional info.
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Microsoft Azure 2017
LVL 13
Microsoft Azure 2017

Azure has a changed a lot since it was originally introduce by adding new services and features. Do you know everything you need to about Azure? This course will teach you about the Azure App Service, monitoring and application insights, DevOps, and Team Services.

I have many voicemails that I transferred from my Android phone Samsung Galaxy Note 4 with a file extension .smil. that I can not listen to . Can you advise me on what to use in order to listen to them? Also, why does the voice mail gets recorded in this file extension not other ones like .avi or .mp3?  Thank you
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Linux OS, ksh script

I have a shell script and  within this shell script there is a line that execute set of commands on a file in a folder. It is something like this

mycommand1 /home/joe/fileFolder xyzd_org1_500.tar.gz
mycommand2
mycommand3
..
..
mycommandn

Now the  requirement changed and the folder can have multiple files as follows

xyzd_org1_500.tar.gz
xyzd_org1_503.tar.gz
xyzd_org1_504.tar.gz
xyzd_org1_505.tar.gz

Now I want put all the commands in a function which accepts the file has a parameter, then call the function in a loop for each file (in ascending order), process 500, 503, 504 etc..
If there is a failure in the function, the shell script should exit with an error without processing the next files. How to do this?
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I have a apple laptop running their MAC OS X 10.13.6. For some reason neither shift keys nor caps log is working. Everything else works fine, except that I can't get any form of capitalizing of letters. I'm about to say that I need to take it to an apple store. Any help would be greatly appreciated.

Steps I've taken thus far:
1. Rebooted
2. Powered off and left off with battery out for 30 sec.
3. Verified the "Speak selected text when key is pressed" was deselected
4. Verified "Enable Slow Keys" was off
5. Verified "Enable Mouse Keys" was off
6. Verified the correct US keyboard layout was selected
7. Deleted com.apple.keyboardtype.plist
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A client running a Dell R620 with three disks in a RAID 5 reported amber blinking light on one of the disks though the OS (ESX) was running fine. I suggested buying a replacement which was delivered complete with hot-swap tray. The client swapped out the drive, but the Amber light continued. I thought it might be tagged as Foreign, so I scheduled a visit.  
 
When I rebooted the server, I went into the RAID controller to clear the (New) Foreign disk config and add it as hot spare so that it would begin rebuilding the RAID.

However, when I got in there the first disk (0) shows as MISSING, the New Disk (1) as Failed, and the third (2) as Online. I shut down and re-seated all of the drives, but no change.

The RAID is in a FAILED State, and with RAID 5 (which this is) you can’t rebuild if two disk fail or are unreachable.

I tried putting the old disk back into Slot 1, but now when I reboot both Disk 0 and 1 show as MISSING.

I also receive "There are offline or missing virtual drives with preserved cache. Please chack the cables and ensure that all drives are present." message.

I read some articles about re-tagging the Virtual Disk. Does this sound like a viable solution?

Any help would be appreciated.
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Phoenix SecureCore Technology Setup BIOS - need to change "Restore AC Power Loss" settings in BIOS from Windows 10 operating system.
We currently have many systems based on this BIOS and we need to be able to have these systems come back online after a power failure.  Additionally, we need to be able to set this from the Windows 10 OS on the system and cannot readily change this in the native boot-access BIOS utility due to logistics and cost.

Can anyone recommend a solution I can try?
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HI,
I'm working on a CICD and would like to include penetration test cases to be executed as part of step 2 and 3

Scenario: in AWS Cloud, a vendor will share an AMI with OS and software installed to me. We will then further customize before using the AMI in our cloud environment. but would like perform some level of pen test during the process of custom base AMI and before deployment.

1: Vendor shared AMI (RedHat 7)
2. Packer to take that AMI , launch it, and install few tools/utils
3. Create another Custom AMI
4. Create stack with custom AMI

Could you provide general advice on what kind of test cases and utils can be executed on AMI with OS Redhat  

Thanks in advance
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Operating Systems

35K

Solutions

36K

Contributors

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.