Why is Ubuntu 20.04 not registering ethernet on my Raspberry Pi?

When the Raspberry Pi boots up, Ubuntu 20.04 says the following:
Net: No ethernet found.
starting USB…
No working controllers found

It continues to boot up, but this means that I can not install a desktop environment on it. The ethernet port and cable work fine, and the Raspberry Pi ethernet jack lights up when the cable is plugged in. How do I get ethernet to be recognized?
Thanks!

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Author: techyguy2

New to Linux, I’m getting this recurring error “ERROR “update-grub” returned an error: exit status 1 ” please advise

I get this error when trying to update my system, all appears to be functioning, but I am new to Linux so I may be missing something

ben@ben-laptop:~$ sudo apt -y upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libllvm9
Use 'sudo apt autoremove' to remove it.
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Requesting to save current system state
Successfully saved as "autozsys_k3262n"
Setting up linux-image-5.4.0-40-generic (5.4.0-40.44) ...
Processing triggers for linux-image-5.4.0-40-generic (5.4.0-40.44) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.4.0-40-generic
I: The initramfs will attempt to resume from /dev/sda2
I: (UUID=a9642385-eacc-4155-b29f-90ba3692f639)
I: Set the RESUME variable to override this.
/etc/kernel/postinst.d/zz-update-grub:
/usr/sbin/grub-probe: error: failed to get canonical path of `bpool/BOOT/ubuntu_0qqeus'.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.4.0-40-generic (--configure):
 installed linux-image-5.4.0-40-generic package post-installation script s
ubprocess returned error exit status 1
Errors were encountered while processing:
 linux-image-5.4.0-40-generic
ZSys is adding automatic system snapshot to GRUB menu
ERROR "update-grub" returned an error: exit status 1 
E: Sub-process /usr/bin/dpkg returned an error code (1)

If I run update-grub by itself I get

ben@ben-laptop:~$ sudo update-grub [sudo] password for
ben:  /usr/sbin/grub-probe: error: failed to get canonical path of
`bpool/BOOT/ubuntu_0qqeus'. 

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Author: BenScoobert

Drag’n’drop files Desktop File manager with 20.04 LTS doesn’t work ; it worked on 18.04 LTS

With Ubuntu 18.04, I can drag and drop files from Desktop to File manager and vice versa.

On my other Ubuntu 20.04 install, this is no more possible.

Has this fetaure been voluntarily removed or is it an accidental regression?

How to enable it again?

Many people seem to have noticed the same problem, see for example the 100+ voted comment about this on the video Ubuntu 20.04 LTS: What’s New?: “Love Ubuntu, but I’m still disappointed a basic feature like drag & dropping files to/from desktop into the file manager is missing.”.

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Author: Basj

Unable to get Netgear A7000 to work on 20.04 despite multiple attempts

I’m new to Linux and I’m trying to set up everything on my own (with manually created partitions for the first time). The installation process was smooth but I’m struggling to get my wifi adapter to work.

I’m using a Netgear Nighthawk AC1900 Wi-Fi USB Adapter (A7000) which works fine with Windows 10 but is not detected by Ubuntu 20.04

So far I’ve tried following steps mentioned in three different posts and none of them has worked for me so far:

  1. First I tried this

    sudo apt-get install git dkms
    git clone https://github.com/zebulon2/rtl8814au.git
    sudo dkms add ./rtl8814au 
    sudo dkms build -m rtl8814au -v 4.3.21
    sudo dkms install -m rtl8814au -v 4.3.21
    
    
  2. Then I tried this

    sudo apt install dkms build-essential git
    git clone https://github.com/aircrack-ng/rtl8812au.git
    cd rtl8812au
    sudo ./dkms-install.sh
    reboot
    
    
  3. Finally I tried this

    git clone https://github.com/aircrack-ng/rtl8812au.git
    cd rtl8812au/
    sudo dkms-install.sh
    
    

Am I missing something?

Also, idk if it is related in any way or if it matters but when I restart Ubuntu my screen goes completely blank and I have to force shutdown my desktop and boot again.

Looking forward to hearing from you all.

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Author: Lakshay Verma

How to install and configure pNFS Servers, MetaData Servers, and clients on Ubuntu 20.04?

Does Ubuntu20.04 support pNFS Server(Data and MetaData) and Client side of pNFS?

If YES, Then How to install and configure it? Is there any comprehensive guide?

How to install and configure pNFS Servers, MetaData Servers, and clients on Ubuntu 20.04?

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Author: Milad

Ubuntu 20.04 takes too long to boot

I have recently installed Ubuntu 20.04 on my HP-notebook(intel core i-5, 8GB RAM, AMD Radeon 2GB). It takes more than 2 min to reach the login screen.

I used the command dmesg to analyze which process it taking too much time only too see the below output:

If you go to timestamp [ 67.555730] rfkill: input handler disabled] , the process just after that by the name of audit has been called so many times and took nearly 50 secs of the boot process.

[   67.460851] [drm] ib test on ring 1 succeeded in 0 usecs
[   67.460874] [drm] ib test on ring 2 succeeded in 0 usecs
[   67.460899] [drm] ib test on ring 3 succeeded in 0 usecs
[   67.460924] [drm] ib test on ring 4 succeeded in 0 usecs
**[   67.555730] rfkill: input handler disabled**
[  111.331719] audit: type=1400 audit(1591675362.633:47): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine" pid=1687 comm="apparmor_parser"
[  111.332012] audit: type=1400 audit(1591675362.633:48): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1687 comm="apparmor_parser"
[  112.182135] audit: type=1400 audit(1591675363.485:49): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap-update-ns.snap-store" pid=1689 comm="apparmor_parser"
[  112.188690] audit: type=1400 audit(1591675363.493:50): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap-update-ns.canonical-livepatch" pid=1691 comm="apparmor_parser"
[  112.190389] audit: type=1400 audit(1591675363.493:51): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.canonical-livepatch.hook.configure" pid=1694 comm="apparmor_parser"
[  112.192167] audit: type=1400 audit(1591675363.497:52): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.canonical-livepatch.canonical-livepatch" pid=1692 comm="apparmor_parser"
[  112.192408] audit: type=1400 audit(1591675363.497:53): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.canonical-livepatch.canonical-livepatchd" pid=1693 comm="apparmor_parser"
[  112.195750] audit: type=1400 audit(1591675363.497:54): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap-update-ns.vlc" pid=1698 comm="apparmor_parser"
[  112.196569] audit: type=1400 audit(1591675363.501:55): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.snap-store.snap-store" pid=1695 comm="apparmor_parser"
[  112.197056] audit: type=1400 audit(1591675363.501:56): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.snap-store.ubuntu-software" pid=1696 comm="apparmor_parser"
[  118.265070] kauditd_printk_skb: 2 callbacks suppressed
[  118.265076] audit: type=1400 audit(1591675369.569:59): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="/snap/core/9289/usr/lib/snapd/snap-confine" pid=1796 comm="apparmor_parser"
[  118.265095] audit: type=1400 audit(1591675369.569:60): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="/snap/core/9289/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1796 comm="apparmor_parser"
[  118.797549] audit: type=1400 audit(1591675370.101:61): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine" pid=1798 comm="apparmor_parser"
[  118.836034] audit: type=1400 audit(1591675370.141:62): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1798 comm="apparmor_parser"
[  119.433628] audit: type=1400 audit(1591675370.737:63): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.core" pid=1800 comm="apparmor_parser"
[  119.529999] audit: type=1400 audit(1591675370.833:64): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.core.hook.configure" pid=1801 comm="apparmor_parser"
[  120.144506] audit: type=1400 audit(1591675371.449:65): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.snap-store" pid=1803 comm="apparmor_parser"
[  120.175883] audit: type=1400 audit(1591675371.481:66): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.vlc" pid=1806 comm="apparmor_parser"
[  120.190680] audit: type=1400 audit(1591675371.493:67): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.ubuntu-software" pid=1804 comm="apparmor_parser"
[  120.211819] audit: type=1400 audit(1591675371.517:68): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.canonical-livepatch" pid=1808 comm="apparmor_parser"
[  147.119565] kauditd_printk_skb: 6 callbacks suppressed
[  147.119569] audit: type=1400 audit(1591675398.426:75): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine" pid=1934 comm="apparmor_parser"
[  147.119577] audit: type=1400 audit(1591675398.426:76): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="/snap/snapd/7777/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1934 comm="apparmor_parser"
[  147.918540] audit: type=1400 audit(1591675399.222:77): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.ubuntu-software" pid=1938 comm="apparmor_parser"
[  147.948852] audit: type=1400 audit(1591675399.254:78): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.ubuntu-software-local-file" pid=1939 comm="apparmor_parser"
[  148.020594] audit: type=1400 audit(1591675399.326:79): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.snap-store" pid=1937 comm="apparmor_parser"
[  148.216393] audit: type=1400 audit(1591675399.522:80): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.snap-store" pid=1936 comm="apparmor_parser"
[  210.116607] [drm] PCIE gen 3 link speeds already enabled
[  210.133629] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[  210.133736] radeon 0000:01:00.0: WB enabled
[  210.133739] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0x0000000002c29bac
[  210.133740] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 0x00000000f44304ae
[  210.133742] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 0x0000000031bde5cd
[  210.133743] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0x00000000d7e92f5c
[  210.133744] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 0x000000001f77e5bc
[  210.326579] [drm] ring test on 0 succeeded in 1 usecs
[  210.326584] [drm] ring test on 1 succeeded in 1 usecs
[  210.326588] [drm] ring test on 2 succeeded in 1 usecs
[  210.326596] [drm] ring test on 3 succeeded in 4 usecs
[  210.326603] [drm] ring test on 4 succeeded in 4 usecs
[  210.326671] [drm] ib test on ring 0 succeeded in 0 usecs
[  210.326732] [drm] ib test on ring 1 succeeded in 0 usecs
[  210.326820] [drm] ib test on ring 2 succeeded in 0 usecs
[  210.326833] [drm] ib test on ring 3 succeeded in 0 usecs
[  210.326844] [drm] ib test on ring 4 succeeded in 0 usecs
[  210.334790] rfkill: input handler enabled
[  210.715243] Bluetooth: RFCOMM TTY layer initialized
[  210.715258] Bluetooth: RFCOMM socket layer initialized
[  210.715273] Bluetooth: RFCOMM ver 1.11
[  224.498251] audit: type=1400 audit(1591675475.797:81): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.ubuntu-software-local-file" pid=2256 comm="apparmor_parser"
[  224.529105] audit: type=1400 audit(1591675475.829:82): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.snap-store" pid=2254 comm="apparmor_parser"
[  224.546528] audit: type=1400 audit(1591675475.845:83): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.snap-store.ubuntu-software" pid=2255 comm="apparmor_parser"
[  224.820589] audit: type=1400 audit(1591675476.121:84): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap-update-ns.snap-store" pid=2253 comm="apparmor_parser"
[  233.396341] rfkill: input handler disabled
[  236.218843] [drm] PCIE gen 3 link speeds already enabled
[  236.230351] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[  236.230455] radeon 0000:01:00.0: WB enabled
[  236.230458] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0x0000000002c29bac
[  236.230459] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 0x00000000f44304ae
[  236.230460] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 0x0000000031bde5cd
[  236.230461] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0x00000000d7e92f5c
[  236.230462] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 0x000000001f77e5bc
[  236.422306] [drm] ring test on 0 succeeded in 1 usecs
[  236.422311] [drm] ring test on 1 succeeded in 1 usecs
[  236.422315] [drm] ring test on 2 succeeded in 1 usecs
[  236.422323] [drm] ring test on 3 succeeded in 4 usecs
[  236.422329] [drm] ring test on 4 succeeded in 4 usecs
[  236.422393] [drm] ib test on ring 0 succeeded in 0 usecs
[  236.422422] [drm] ib test on ring 1 succeeded in 0 usecs
[  236.422554] [drm] ib test on ring 2 succeeded in 0 usecs
[  236.422583] [drm] ib test on ring 3 succeeded in 0 usecs
[  236.422597] [drm] ib test on ring 4 succeeded in 0 usecs

Also, it takes about 10 secs to load the desktop and icons from login screen.

Below is the head of the output of $system-analyze blame.

41.797s plymouth-quit-wait.service                           
25.586s man-db.service                                       
21.755s NetworkManager-wait-online.service                   
19.547s networkd-dispatcher.service                          
12.294s apt-daily.service                                    
10.432s dev-sda2.device                                      
10.193s udisks2.service                                      
 9.942s accounts-daemon.service                              
 7.864s NetworkManager.service                               
 7.050s snapd.service                                        

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Author: Hades

New unknown users appearing on ubuntu, virus?

there are these two users periodically appearing in my ubuntu system (‘jicofo’,’jvb’) I have deleted them twice (in 19.10) but they reappeared again, so I thought I’d look into it and turns out they own a good amount of files, I am yet to check if there are any particularly interesting ones, in the meanwhile is that possible I got a malware somewhere in ubuntu 19.10? If so, would my upgrade to ubuntu 20.04 do something or nah?
What should my next course of action be? Backup and reinstall? If those users own those files, even if I delete all the ones they own I think I would backup them too wouldn’t I?
Thank you for taking the time to read this, hope someone can help me 🙂

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Author: Matteo Librizzi

Wifi disconnects automatically after sometime

My WiFi disconnects automatically after sometime and is working again only after a reboot.

Here is the result of lshw -C network

  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eno1
       version: 15
       serial: 80:ce:62:7c:c1:77
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII
       resources: irq:16 ioport:4000(size=256) memory:b1104000-b1104fff memory:b1100000-b1103fff
  *-network DISABLED
       description: Wireless interface
       product: RTL8723DE 802.11b/g/n PCIe Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlo1
       version: 00
       serial: 40:9f:38:f7:ca:8f
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtw_pci driverversion=5.4.0-33-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:130 ioport:3000(size=256) memory:b1000000-b100ffff

and here is result of iwconfig

wlo1      Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

i am using ubuntu 20.04

EDIT: output of rfkill list all

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

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Author: parv desai

Ubuntu specific RAM issues – chrome crashing and memtest86 freezing

G’day,

I’m running 4x8GB sticks of corsair vengeance LPX RAM, a 5700xt and an r5 3600x.

I just installed ubuntu 20.04 a week ago to dual-boot with windows and I’ve been having RAM-related problems. Google chrome pages have been crashing with the aw, snap error: SIGSEGV. Chrome will also completely crash if I have too many tabs open. I ran memtest86 from the ubuntu boot menu and it freezes at 16% on the first pass when I have all my ram in and 35% when only 2 sticks are in (doesn’t seem to matter which two sticks or which DIMM slots, either). I’ve yet to be able to get past 2 seconds into a memtest86 test.

I don’t have these issues when I run windows as the OS and the Windows Memory Diagnostic didn’t return any errors. It seems like the issues come when I try to access more than a certain amount of RAM in Ubuntu but I’m not sure.

The command free -m shows the amount of memory i’d expect.

Does anyone have any thoughts? I’ve tried installing PPA drivers for my GPU and had a look at the latency timings for my RAM in the UEFI but no luck.

Cheers.

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Author: RuddyDev

Ubunutu 20.04 Gnome shell crashing on enabling Extensons from Gnome Tweak Tool

I recently upgraded from Ubuntu 18.04 to 20.04
Everything is working fine except the Extensions

I tried enabling them using Gnome Tweaks Tool

Tweak tools -> Extensions Sidebar -> Top right corner
Gnome Tweaks Tools

But as soon as I toggle that, the shell crashes and I see this screen.
Shell Crashes

I am forced to logout and then login again. And then extensions are disabled again.

I tried enabing them even through dconf editior but the same thing happens. The shell crashes immidiately.

I tried looking for solutions but it seems like the issue is experienced by extremely few people. I could only find one question for it on Reddit(no solutions on it yet).

Does anyone know what the issue is about and if there is a fix for it? I am not able to use extensions and this is really bothering me. I am ready to provide any further details necessary to fix this issue

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Author: Abhishek Jain

VNC on Ubuntu 20.04 without monitor

Since couple of days I am trying to set VNC Connection with my “server” Ubuntu desktop 20.04. I want to use it as remote workstation and I want to use gnome3 environment, VNC Connect or NoMachine (for better management). Everything works well as long as monitor is attached. As soon as I remove monitor – connection breaks. Ok, that’s how it works. I have created dummy screen…

sudo apt-get install xserver-xorg-video-dummy

With config based on this post:

Add Fake Display when No Monitor is Plugged In

I can access server, but it stuck on login screen with password prompt. When I put password, nothing happen. Still login screen with password prompt.

If anybody have any idea – please, help.

Regards

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Author: sawax

Boot Freezes and “Loading initial Ramdisk”

Boot Freezes and “Loading initial Ramdisk”

I upgraded from Ubuntu 19 to Ubuntu 20.04 yesterday and then on restart my Laptop (Alienware 17r4 , Nvidea GTX1070) freezez at “Loading initial Ramdisk”

i googled a lot and applied couple of workarounds but didnt help
– Adding nomodeset – Didnt help .
– Updated my Bios Firmware from Dell – Didnt help
– Updating grub2 – didnt help

The weird thing is that when i enable Secure Boot from Bios , it lets me Boot one time and then it does not let me boot upon restart . I again have disbale Secure boot , then when i boot i boot upto Login screen of Ubuntu but id does not let me pass through even after entering correct password and then when i enable secure boot it lets me boot Normally(very Slow)

i tried to Folloow : Ubuntu 18.04 fails to boot even in recovery mode (stuck on loading initial ram disk) on ASUS UX433FA
but i dont think the mentioned intel drivers are availaible for ubuntu 20.04

-i am using Nvidea Proprietary drivers (nvidea-driver-440)

Any help will be highly appreciated

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Author: Yogesh Singh