Learn something new every day

Flash iso using terminal with mac

2025-04-15T12:15:00.002+08:00

Probably not the "easy" way, because it's not graphical. But it is kinda pretty easy.

Open terminal (press cmd+space and type "terminal")

First type "diskutil list" and press enter (always without the inverted commas)

then insert your usb stick and run "diskutil list" again to see the disk node (e.g. /dev/disk2)

Now run "diskutil unmountDisk /dev/diskN" (where N is the number of the usb stick)

and then run "sudo dd if=/path-to.iso of=/dev/rdiskN bs=1m"

(after typing "sudo dd if=" you simply copy paste the path that's to be found when you right click on the file, then click "get info" and copy the path under "Where")

When finished "diskutil eject /dev/diskN"

Fix: VMWare workstation 17 shared folder between host windows and Linux VM

2024-02-21T10:59:00.004+08:00

vmware-hgfs client shows up shared folder but nothing shown under /mnt/hgfs

run the following to fix this issue.

sudo vmhgfs-fuse .host:/ /mnt/hgfs/ -o allow_other -o uid=1000

Fixed: failed to execute script pyinstaller-entry-point (ADE start)

2023-08-16T22:56:00.006+08:00

Docker may not be installed on the machine,this can be an issue as ade is just a wrapper on the docker. you can use the following page https://docs.docker.com/engine/install/ubuntu/ for installation of docker or short instructions are as below.

Replay udp data using tcpreply

2023-05-18T14:03:00.002+08:00

tcpreplay is primarily designed for replaying packets at the network level and may not be suitable for replaying UDP packets. Thus bit of work is needed to replay this data. update the input.pcap to us your desired MAC id's


tcprewrite --enet-dmac=destinationMAC --enet-smac=sourceMAC -i input.pcap -o output.pcap

Replace destinationMAC with the MAC address of the destination machine or network interface you wish to send the UDP packets to. Replace sourceMAC with the MAC address of the network interface you plan to send the packets from. Now you would be able to replay this packets


sudo tcpreplay -i input.pcap -o output.pcap

test script to read this packets ( Python3 script is provided to read data on port 9999 )


import socket

UDP_IP = "0.0.0.0"
UDP_PORT = 9999

sock = socket.socket(socket.AF_INET, # Internet
                     socket.SOCK_DGRAM) # UDP
sock.bind((UDP_IP, UDP_PORT))

while True:
    data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
    print("received message: %s" % data)

Failed init_port fastrtps_port7412: open_and_lock_file failed

2023-03-30T10:19:00.003+08:00

Use following to fix the RTPS_TRANSPORT_SHM Error

Fix for HDMI to an external monitor:

2022-05-20T16:02:00.001+08:00

Run the commands below with the HDMI connected to my monitor:

xrandr --listproviders (to make sure you have NVIDIA-G0 as a provider)
xrandr --setprovideroutputsource NVIDIA-G0 modesetting
xrandr --auto

Ref: Found the info in the last post in this thread: https://www.linuxquestions.org/questions/debian-26/debian-11-bullseye-on-optimus-laptop-not-detecting-external-screen-4175690446/

Solution : how to check if the drive is ssd or hdd ?

2022-05-20T15:58:00.006+08:00

Command : lsblk -o NAME,ROTA

Result:

NAME   ROTA
sda       0
└─sda1    0
sdb       1
├─sdb1    1
├─sdb2    1
├─sdb3    1
├─sdb4    1

nvmep1    1

 1 for hard drive and 0 for ssd.

Add the pem certificate to linux

2022-01-05T14:40:00.003+08:00

Add the ca-certificate to access the site.

# Extract pem files
unzip cert-cas.zip
cd cert-cas

# convert all pem files to crt
for f in *; do mv -- "$f" "${f%.pem}.crt"; done

sudo mkdir /usr/local/share/ca-certificates/extra
sudo cp *.crt /usr/local/share/ca-certificates/extra/root.cert.crt
sudo update-ca-certificates

certificates will be available ( below shows confirmation )

test@testM1:/usr/local/share/ca-certificates/extra$ sudo update-ca-certificates 
Updating certificates in /etc/ssl/certs...
rehash: warning: skipping duplicate certificate in cert-cas.pem
3 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...

Adding debian:test.com-cachain.pem
Adding debian:test.com-rootca.pem
Adding debian:test.com-subca.pem
done.
done.

Find files in dir not contain a string

2022-01-05T14:28:00.004+08:00

Error: GitHub.DistributedTask.ObjectTemplating.TemplateValidationException Unrecognized named-value: 'secrets'

2021-11-11T11:07:00.002+08:00

Error: GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. /home/runner/work/test/test/./.github/actions/test/action.yml (Line: 22, Col: 14): Unrecognized named-value: 'secrets'. Located at position 1 within expression: secrets.PASS

Fix: actions does not have access to secrets, only the workflow is allowed to access secrets.

workflow to pass the secret as:

with:
  secret_input: ${{ secrets.SUPER_SECRET }}

And then, in action.yml,

inputs:
  secret_input: 
     description: "..."
     required: true
...

runs:
.....
  - name: .....
    env:
      MY_SECRET: ${{ inputs.secret_input }}

fix: docker: Error response from daemon: could not select device driver "" with capabilities: [[gpu]].

2021-11-05T12:47:00.005+08:00

add export ADE_DISABLE_NVIDIA_DOCKER=1 to .aderc at the start

Use github action to checkout gitlab (or external submodules)

2021-10-08T10:41:00.003+08:00

add the CI_USER and CI_PAT to your github repo under secrets.

replace gitlab with your external repo.

"apt full-upgrade" returns "1 not fully installed or removed."

2021-09-16T16:32:00.004+08:00

1. find the issue.
sudo dpkg -C

test@test:/var/lib/dpkg$ sudo dpkg -C

The following packages are in a mess due to serious problems during

installation. They must be reinstalled for them (and any packages

that depend on them) to function properly:

libreoffice-common office productivity suite -- arch-independent files

3. Remove the broken package via the following command:

sudo dpkg --remove --force-remove-reinstreq libreoffice-common

4. Install the package again:

sudo apt-get install libreoffice-common

Wifi setup from command line on linux

2021-09-02T10:57:00.000+08:00

1. find the wireless interface (starting with w)

ip a

2. To check the configuration of the wireless interface

sudo iwconfig

2. make sure the wireless interface is up

sudo ip link set w___ up

3. find the ESSID of available for connection

sudo iwlist w___ scan | grep ESSID

4.1 Connect to the ESSID of your choice ( yyy )

sudo iwconfig w___ essid yyy

4.2 If it's password-protected then use

sudo iwconfig w___ essid yyy key s:zzz

(Here "s:" is used for string, while "zzz" is your key)

5. Setting up dhcp

sudo dhclient w___

6. check the connection to the internet

ping 8.8.8.8

recursively delete empty directories

2021-08-02T10:22:00.005+08:00

delete all empty folders in current dir

find . -type d -empty -delete

delete all empty files in current dir

find . -type f -empty -delete

print all empty folders in current dir

find . -type d -empty -print

ade environment share directory from local machine or external drive

2021-07-23T14:11:00.006+08:00

Add following to the .aderc ( lsblk can be used to find the mounted dir if it's a external usb drive or SSD )

--mount type=bind,source=/media/sda1-usb-Generic_Flash_Di,destination=/media/sda1-usb-Generic_Flash_Di,bind-propagation=shared

Ref:

https://serverfault.com/questions/903534/use-auto-mounted-usb-drives-in-docker-container

fix Font characters displayed as squares in Ubuntu

2021-05-20T10:15:00.003+08:00

execute

rm -rf ~/.cache/fontconfig 
sudo fc-cache -r -v

enter your sudo password after executing this lines and  reboot

Setup ragner highlighting file

2021-05-19T14:25:00.003+08:00

sudo apt install ranger highlight

to setup highlighting of file execute following

ranger --copy-config=scope

OSError: liblas_c.so.3: cannot open shared object file: No such file or directory

2021-05-06T13:16:00.003+08:00

sudo apt install -y liblas-c-dev

Fix Microsoft OneDrive export large ZIP files that are corrupt

2021-04-27T21:44:00.000+08:00

File downloaded where size is more then 4GB, when you try unzipping shows corrupt.

Looks like there is a bug in the zip library itself that is not fixed. Following is a workaround.

problem:

 zipfile corrupt.
  (please check that you have transferred or created the zipfile in the
  appropriate BINARY mode and that you have compiled UnZip properly)

Solution: (from Paul Marquess)

https://github.com/pmqs/Fix-OneDrive-Zip

fix-onedrive-zip onedrive-zip-test-zeros.zip

After running the script, You shall be able to unzip the file as normal without error.

Note:-

If you want to see detailed explanation then see following

https://www.bitsgalore.org/2020/03/11/does-microsoft-onedrive-export-large-ZIP-files-that-are-corrupt

fix : nvml error: driver/library version mismatch: unknown.

2021-04-27T21:38:00.000+08:00

reboot the main machine and then retry.

Error response from daemon: OCI runtime create failed: container_linux.go:367: starting container process caused: process_linux.go:495: container init caused: Running hook #0:: error running hook: exit status 1, stdout: , stderr: nvidia-container-cli: mount error: stat failed: /dev/nvidia-modeset: no such file or directory: unknown.

2021-04-14T15:53:00.002+08:00

Solution:

(Platform Ubuntu)

Open software & updates
go to additional drivers
Select to using X.Org X Server - Nouveau
Apply
Select Using NVIDIA Driver metapakage nvidia-driver
Apply

now you can see the file is not missing.

ls -al /dev/nvidia-modeset

fix : Unable to update nvidia driver on ubuntu

2021-01-29T10:48:00.001+08:00

sudo software-properties-gtk

1. go to the main tab and remove all selection and select close. ( Let the list update)

2. run the same command, select all options and apply close letting the list update.

3. now you can run the same command go to Additional Driver and install the Nvidia driver.

Problem: ( Ubuintu-16.04, issue with software properties not saved properly)

The following packages have unmet dependencies:
nvidia-460 : Depends: lib32gcc1 but it is not going to be installed
Depends: libc6-i386 but it is not going to be installed

fix : WslRegisterDistribution error 0x80370102

2020-11-19T11:17:00.004+08:00

under powershell (run as admin) execute following.

wsl --set-default-version 1

then run your vm again.

fixed sed: preserving permissions for : Permission denied (Windows, MingW)

2020-09-16T15:00:00.005+08:00

issue : Windows security settings.

Open the folder's Properties settings from the context menu. In the Security tab, click Edit, press Add... in the pop-up window and add your user to the list, check Full Control in the Allow column. Press OK twice to apply the changes.