claude code via Azure, in different profile

 In case you need to create a different profile, you can use following in bashrc:

alias azure_claude='

CLAUDE_CONFIG_DIR="$HOME/.azure_claude" \

CLAUDE_CODE_USE_FOUNDRY=1 \

ANTHROPIC_DEFAULT_SONNET_MODEL="claude-sonnet-4-6" \

ANTHROPIC_DEFAULT_HAIKU_MODEL="claude-haiku-4-5" \

ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-6" \

ANTHROPIC_FOUNDRY_BASE_URL="https://<project>.services.ai.azure.com/anthropic" \

ANTHROPIC_FOUNDRY_API_KEY=<API_KEY> \

/home/qspcadmin/.local/bin/claude'

installing LineageOS, via Claude code

Asked Claude code to install LineageOS on my old phone. It installed it but had to give below finishing touches in order for Sim to work properly.

Your OnePlus 6T is now fully set up with LineageOS 22.2 + Google Apps, and the Tello SIM is connected to LTE. If the issue recurs after a reboot, just dial *#*#4636#*#* on the phone to open the Radio Info screen and turn the radio on again.

 1. Look for "Preferred Network Type" dropdown — set it to LTE/WCDMA/GSM auto

 2. Look for a "Turn on Radio" or "Radio Power" button — tap it to turn the radio ON

Linux comand line autocomplete

    INDICATORS_DIR=/projects/equities/simulation/indicators

   _daily_indicator_complete() {

       local cur prev words

       cur="${COMP_WORDS[COMP_CWORD]}"

       prev="${COMP_WORDS[COMP_CWORD-1]}"

       words="${COMP_WORDS[*]}"

       # Only activate when command line contains daily_*.py

       [[ "$words" == *daily_*.py* ]] || return

       if [[ "$prev" == "-i" || "$cur" == *,* ]]; then

           local indicators=$(ls "$INDICATORS_DIR"/*.py 2>/dev/null \

               | xargs -n1 basename | sed 's/\.py$//' | sort -u)

           if [[ "$cur" == *,* ]]; then

               local prefix="${cur%,*},"

               local last="${cur##*,}"

               COMPREPLY=( $(compgen -W "$indicators" -- "$last") )

               COMPREPLY=( "${COMPREPLY[@]/#/$prefix}" )

           else

               COMPREPLY=( $(compgen -W "$indicators" -- "$cur") )

           fi

       fi

   }

   complete -o nospace -o default -F _daily_indicator_complete /opt/envs/py38/bin/python

SSH port forwarding

following command will make server think 8194 port on the server is open and all requests will be forwarded to the machine FROM WHICH you are SSHing.

 ssh -R 8194:localhost:8194 username@server

Restrict Chrome profiles

 If you want to restrict chrome profiles to a specific profile only, you need to create following file:

harshal@HP-Desktop:~$ cat /etc/opt/chrome/policies/managed/temp.json 
{
	"BrowserAddPersonEnabled": false,
	"BrowserGuestModeEnabled": false,
	"IncognitoModeAvailability": false,
	"IPFSEnabled": false,
	"RestrictSigninToPattern": "*",
	"BrowserSignin": 2,
}
harshal@HP-Desktop:~$

dell inspiron WiFi adapter not detected in Ubuntu 24.04

 sudo apt-get remove bcmwl-kernel-source

sudo apt-get install firmware-b43-installer b43-fwcutter

cat /etc/modprobe.d/* | egrep 'bcm'
(You may want to copy this) and see if the term 'blacklist bcm43xx' is there.

If it is, type cd /etc/modprobe.d/ and then sudo gedit blacklist.conf

Put a # in front of the line: blacklist bcm43xx

clean csv columns

 pip install csvkit

csvcut -c <column1>,<column2> file.csv

Getting external facing IP

 * curl ifconfig.me

Generating your own certificate

* openssl req -newkey rsa:2048 -nodes -keyout myCompany.key -out myCompany.csr
* openssl x509 -signkey myCompany.key -in myCompany.csr -req -days 365 -out myCompany.crt

Get versions of python modules installed

 pip freeze | egrep 'pandas|pandas_market_calendars'

if you want to install a specific version:

pip install pandas_market_calendars==4.5.1

ssh banners

 This command will output SSH banners from the server as pseudo-terminal is not allocated.

#!/bin/bash

ssh <user>@<server> << EOF

echo 'hi A'

EOF

In order to remove the banner, we can either change the command as follows:

#!/bin/bash

ssh <user>@<server> 'exec bash' << EOF

echo 'hi A'

EOF

or easiest way is 

touch ~/.hushlogin

Zip file exploration

 in data exploration, when you have a lot of zip files, you need a way to look at the cotents with extracting each zip file.

• zcat file.log.zip | less
• unzip -p archive.zip file1.txt | less

OR the best way

• vim archive.zip

VSCode (Not Visual Studio)

 

• Shortcuts:
• Ctrl+P - Open a file
• Ctrl+Alt+F - Search for a file in Explorer

• Extensions:
• Remote Explorer - SSH
• 
  
• Git Lense - Git integration
• Data wrangler - Table view of data frames
• Zip Tools - Exploring zip files in a data set
• Windsurf / Codium - Auto Completion
• R-debugger via command line : install.packages("vscDebugger", repos = "https://manuelhentschel.r-universe.dev") # r-debugger vscode extension

Sending email from Python

 Can setup SMTP inside python itself but for better protection, setup sendmail with SMTP as in other post and then:

More focused module : 

def send_mail(email, subject, body="", dataframe_dict = {}):

    html_content = ""

    for name, df in dataframe_dict.items():

        html_content += f"<h3>{name}</h3>"

        html_content += df.to_html(escape=False, classes='table table-striped', table_id='dataframe')

        html_content += "<br><br>"

    styled_html = f"""

    <html>

    <body>

        {body}

        <br><br><br><br>

        {html_content}

    </body>

    </html>

    """

    # Send HTML email using mail command

    process = subprocess.Popen(

        ['mail', '-s', subject, '-a', 'Content-Type: text/html', email],

        stdin=subprocess.PIPE,

        text=True

    )

    process.communicate(input=styled_html)

    print(f"Email sent to {email}.")

Or generic script:

import subprocess

import os

import argparse

from email.mime.text import MIMEText

from email.mime.multipart import MIMEMultipart

from email.mime.base import MIMEBase

from email import encoders

def send_file_as_email(file_path, to, subject):

    """Sends an HTML file as the email body and also as an attachment."""

   

    # If subject is None, use the base file name

    if subject is None:

        subject = os.path.basename(file_path)

    # Create the email with mixed content (text + attachments)

    message = MIMEMultipart("mixed")

    message["Subject"] = subject

    message["To"] = to

    # Read HTML content and attach as email body

    with open(file_path, "r") as file:

        html_content = file.read().strip()

    html_body = MIMEText(html_content, "html")

    message.attach(html_body)

    # Attach the file as an attachment

    with open(file_path, "rb") as file:

        attachment = MIMEBase("application", "octet-stream")

        attachment.set_payload(file.read())

    # Encode to base64

    encoders.encode_base64(attachment)

    attachment.add_header("Content-Disposition", f'attachment; filename="{os.path.basename(file_path)}"')

    message.attach(attachment)

    # Send email using sendmail

    process = subprocess.Popen(["/usr/sbin/sendmail", "-t", "-i"], stdin=subprocess.PIPE)

    process.communicate(message.as_bytes())

    print("Email sent successfully!")

def main():

    """Parses command-line arguments and sends an email."""

   

    parser = argparse.ArgumentParser(description="Send an HTML file as an email body & attachment.")

    parser.add_argument("-f", "--file", required=True, help="Path to the HTML file")

    parser.add_argument("-t", "--to", default="harshal.patil@firl.com", help="Recipient email address (default: harshal.patil@firm.com)")

    parser.add_argument("-s", "--subject", default=None, help="Email subject (default: file name)")

    args = parser.parse_args()

    send_file_as_email(args.file, args.to, args.subject)

if __name__ == "__main__":

    main()

Bloomberg BQL

 BQL is not part of daily limit. So we can use those to get the data even when limit is hit:

=@BQL.QUERY("get(" & TEXTJOIN(",", TRUE, B1:E1) & ") for(members('RAY Index'))","cols=7;rows=5919")

where cells B1 to E1 have fields as follows:

market_cap px_volume 30_day_average_volume_at_time factor_expected_daily_volume

Python Selenium Webdriver sample program

 this is a sample program using selenium to click a button:

from selenium import webdriver

from selenium.webdriver.common.by import By

from selenium.webdriver.chrome.service import Service

from webdriver_manager.chrome import ChromeDriverManager

import time

# Set up Chrome options

chrome_options = webdriver.ChromeOptions()

chrome_options.add_argument("--headless")  # Run in headless mode (no UI)

chrome_options.add_argument("--disable-gpu")  # Disable GPU acceleration for headless mode

chrome_options.add_argument("--no-sandbox")  # Disable sandboxing for headless mode

chrome_options.add_argument("--disable-dev-shm-usage")  # Fix shared memory issues

# Set up ChromeDriver using Service (Selenium 4)

service = Service(ChromeDriverManager().install())

# Initialize WebDriver (Chrome) with the path to your ChromeDriver

driver = webdriver.Chrome(service=service, options=chrome_options)

try:

    # Open the website

    driver.get("http://omsprodapp:9900/oms/f#ListedWrapper")

    

    # Wait for the page to load (you might need to adjust this)

    time.sleep(5)

    # Find the "Blotter All" button by its ID and click it

    blotter_button = driver.find_element(By.ID, "blotAllButt")

    blotter_button.click()

    # Wait for the action to complete (adjust the sleep if needed)

    time.sleep(2)

    print("Successfully clicked 'Blotter All'!")

finally:

    # Close the browser after the task is completed

    driver.quit()

logger.sh

 #!/bin/bash

source /home/$LOGNAME/.env

# Ensure at least two arguments are provided

if [ "$#" -lt 2 ]; then

    echo "Usage: $0 <command> <file_path> [additional_args...]"

    exit 1

fi

# Extract filename from the second argument

filename=$(basename "$2")

# Define log directory and log file path

log_dir="/stage/$LOGNAME/logs/$filename"

log_file="$log_dir/$(date +%d).log"

# Create log directory if it doesn't exist

mkdir -p "$log_dir"

# Redirect STDOUT and STDERR to the log file (no output on terminal)

exec >> "$log_file" 2>&1

echo "Executing "$@" at `date`"

# Execute the provided command

eval "$@"

Windows 11 Pro cannot grab window when maximized

 Win + R -> "control access.cpl"

Make the mouse easier to use

UnCheck "Prevent windows from being automatically arranged"

Loading env file in bash

 If you want to load .env file before running a command in bash, we can use following utility. (Can use the just the command as well.)

14:54:00 harshal@HP:~$ set -a; source ~/.env; set +a; CMD

or

14:55:42 harshal@HP:~$ cat ~/load_dot_env.sh

set -a; source ~/.env; set +a

14:55:47 harshal@HP:~$ source ~/load_dot_env.sh 

14:55:49 harshal@HP:~$ 

 

Citrix workspace on Ubuntu 2404

Typically, we start Citrix with this command:

/opt/Citrix/ICAClient/selfservice

But I was getting this error :

harsshal@HP:~$ /opt/Citrix/ICAClient/selfservice 

/opt/Citrix/ICAClient/selfservice: error while loading shared libraries: libwebkit2gtk-4.0.so.37: cannot open shared object file: No such file or directory

But followed these steps and then it worked:

sudo add-apt-repository -y "deb http://gb.archive.ubuntu.com/ubuntu jammy main"

sudo apt update

sudo apt install libwebkit2gtk-4.0-dev

To enable middle click, Change the configuration file  :

sudo vim /opt/Citrix/ICAClient/config/All_Regions.ini:

MouseSendsControlV=False 

AutoHotKey programs

volume.ahk

#Requires AutoHotkey v2.0

Volume_Down::SoundSetVolume "-10"

Volume_Up::SoundSetVolume "+10"

Volume_Mute::SoundSetMute "-1"

mouse.ahk

#Requires AutoHotkey v2.0

waitTime := 5 ; Number of minutes to wait

Loop {

    Sleep waitTime * 60 * 1000

    MouseMove 10, 0, 20, "R"

    MouseMove -10, 0, 20, "R"

}

blotter.ahk

#Requires AutoHotkey v2.0  ; Ensure the script runs with AutoHotkey v2

SetTimer RunCommand, 3600000  ; Set a timer to run every 1 hour (3600000 milliseconds)

RunCommand()

{

    currentTime := FormatTime("HH")  ; Corrected FormatTime call

    if ((currentTime >= 7 and currentTime <= 15) or currentTime = 17)  ; Check if it's between 7 AM - 3 PM or exactly 5 PM

    {

        Run("C:/Users/hpatil/AppData/Local/Microsoft/WindowsApps/python.exe c:/Users/hpatil/webdr.py")

    }

}

or

 #Requires AutoHotkey v2.0  ; Ensure the script runs with AutoHotkey v2

SetTimer RunCommand, 60000  ; Run every 60 seconds (1 minute)

RunCommand()

{

    run_times := ["0715", "0815", "1000", "1340", "1500", "1700"]  ; Define allowed times

    currentTime := FormatTime(A_Now, "HHmm")  ; Get current time in HHMM format

    if HasVal(run_times, currentTime)  ; Check if currentTime is in the array

    {

        Run("C:/Users/hpatil/AppData/Local/Microsoft/WindowsApps/python.exe c:/Users/hpatil/webdr.py")

    }

}

HasVal(haystack, needle)

{

    if !IsObject(haystack)  ; Ensure it's an array before looping

        throw Error("Bad haystack!")  ; Use `Error` instead of `Exception`

    for value in haystack

        if (value = needle)

            return true  ; Return true if found

    return false  ; Return false if not found

}

Sending email via command line

Requirements:

sudo apt install mailutils

sudo apt-get install ssmtp

cat /etc/ssmtp/ssmtp.conf

mailhub=email.firm.com:25 <smpt server>

Then there are multiple ways to it 

cat temp

To: harshal.patil@adyne.com 

Subject: Some Notifying Email 

MIME-Version: 1.0 

Content-Type: text/plain 

Body of your email goes here. Hello world

cat temp | sendmail -i -t

OR

 echo -e "To: harshal.patil@firm.com\nSubject: Subject\nContent-type: text/html" | cat - /stage/qspc/projects/sas/tools/sas_slippage_outliers.html | sendmail -i -t

OR

52 07 * * 1-5 echo "To: harshal.patil@firm.com, harshal.patil@firm.com \nSubject: Slippage Outliers $(date +\%F) \nContent-type: text/html\n\n" > /tmp/email_body.txt;cat /stage/qspc/projects/sas/tools/sas_slippage_outliers.html >> /tmp/email_body.txt;cat /tmp/email_body.txt | /usr/sbin/sendmail -i -t > /stage/qspc/logs/sendmail/$(date +\%d).log 2>&1

If wanted to attach as a file (when html contains graphs):

 (cat /stage/qspcadmin/logs/sendmail/intraday_liquidation.header ; uuencode /stage/qspcadmin/projects/sas/tools/intraday_liquidation.html intraday_liquidation.html) | /sbin/sendmail -i -t

where 

$ cat /stage/qspcadmin/logs/sendmail/intraday_liquidation.header
#To: harshal.patil@firm.com, a.b@firm.com
To: harshal.patil@firm.com
Subject: Intraday Strategy Liquidation

if you wanted an image embeded in the bodt:

(

echo "From: sender@example.com"

echo "To: recipient@example.com"

echo "Subject: Embedded Image"

echo "MIME-Version: 1.0"

echo 'Content-Type: multipart/related; boundary="boundary123"'

echo ""

echo "--boundary123"

echo "Content-Type: text/html; charset=UTF-8"

echo ""

echo '<html><body>'

echo '<p>Here is an embedded image:</p>'

echo '<img src="cid:myimage" width="600" height="400">'

echo '</body></html>'

echo ""

echo "--boundary123"

echo "Content-Type: image/jpeg"

echo 'Content-Transfer-Encoding: base64'

echo 'Content-Disposition: inline; filename="image.jpg"'

echo 'Content-ID: <myimage>'

base64 image.jpg

echo "--boundary123--"

) | sendmail -t

Python / pandas last_bday

import pandas as pd

from pandas.tseries.offsets import BDay

today = pd.to_datetime('today')

last_bday = today - BDay(1) 

Python groupby

 There are 2 ways to normal results:

• use agg function

grp_df = df.groupby(['BookLevel4','Symbol','Direction','OrderId'], as_index=False).agg({'TxTime':['min','max','count'], 'FillQuantity':['sum']})

grp_df.columns = [''.join(col).strip() for col in grp_df.columns.values]

• use apply function 
• In case you use more than 1 column
• Wont have to normalize multi-level columns

grp_df = df.groupby(['BookLevel4','Symbol','Direction','OrderId'], as_index=False).apply(

        lambda s: pd.Series({

            "TxTimemin": s["TxTime"].min(),

            "TxTimemax": s["TxTime"].max(),

            "TxTimecount": s["TxTime"].count(),

            "FillQuantitysum": s["FillQuantity"].sum(),

            "FillVWAP": (s['FillPrice'] * s['FillQuantity']).sum() / s['FillQuantity'].sum()

        })

    )

my .bcrc

 scale=6

my .screenrc

All possible variables are listed here:

https://www.gnu.org/software/screen/manual/html_node/String-Escapes.html#String-Escapes

 Here are the contents of my screenrc:

# Change default scrollback value for new windows

defscrollback 10000 # default: 100

# no welcome message

startup_message off

# advertise hardstatus support to $TERMCAP

termcapinfo  * '' 'hs:ts=\E_:fs=\E\\:ds=\E_\E\\'

termcapinfo xterm* ti@:te@

vbell "off"

bindkey "^[OR" prev

bindkey "^[OS" next

hardstatus alwayslastline

hardstatus string '%{= kG}[%{G}%H%? %1`%?%{g}][%= %{= kw}%-w%{+b yk} %n*%t%?(%u)%? %{-}%+w %=%{g}][%{B}%m/%d %{W}%C%A%{g}]'

screen -t notebook 

screen -t local

Docker commands

 Was trying to create a docker for android. Here are the commands I used:

* sudo apt-get install qemu-kvm

* curl -fsSL https://get.docker.com -o get-docker.sh

* sh ./get-docker.sh

*docker run -d -p 6080:6080 -e EMULATOR_DEVICE="Samsung Galaxy S10" -e WEB_VNC=true --device /dev/kvm budtmo/docker-android:emulator_13.0

* sudo chmod 666 /var/run/docker.sock 

(if permission denied in previous step)

* docker ps

* docker stop <NAME>

Date conversion in MySQL

With recent release, MySQL throws error when inserting dates. This is because, by default "strict mode" is enabled. To get rid of the errors, we need to do something as follows:

SHOW VARIABLES LIKE 'sql_mode';

set sql_mode='';

Installing IBC (Interactive Broker Controller)

 This is a nice utility to keep ibkr TWS running. These are the commands :

$ wget https://github.com/IbcAlpha/IBC/releases/download/3.20.0/IBCLinux-3.20.0.zip

$ sudo unzip IBCLinux-3.20.0.zip -d /opt/ibc

$ sudo chmod o+x /opt/ibc/*.sh /opt/ibc/*/*.sh

$ cat ~/ibc/config.ini

     IbLoginId=<username>

     IbPassword=<password>

$ rm IBCLinux-3.20.0.zip

New Linux installation checklist

• sudo apt install ~/Downloads/google-chrome-stable_current_amd64.deb
• sudo apt-get install gnome-browser-connector
• sudo apt install libreoffice
• sudo apt install git-all
• ssh-keygen -t rsa
• sudo snap install code
• sudo apt install python3-venv
• python3 -m venv ~/.venv/ibkr_python

• https://extensions.gnome.org/extension/1160/dash-to-panel/
• Dash-to-panel settings (right click) -> ungroup applications
• settings -> system -> date/time -> show weekday

• Install vscode, extensions- python

git commands

Following are basic git commands which should be sufficient for most of the git use :

git fetch

git pull

git commit

git push

Automated script to commit:

#!/bin/bash

ssh qspcadmin@USAZLINUXQSPCQ01 << EOF

cd /stage/qspcadmin/projects/sas

git fetch

git pull

git add .

git commit -m "Automated Commit"

git push

EOF

Automated bashrc function to commit with good message:

function gpt_commit() {
    diff=$(git diff)
    response=$(curl -s -X POST https://api.openai.com/v1/chat/completions \
      -H "Authorization: Bearer $OPENAI_API_KEY" \
      -H "Content-Type: application/json" \
      -d @- <<EOF
{
      "model": "gpt-4o-mini",
      "messages": [
        {
          "role": "system",
          "content": "You are an assistant that writes concise and informative git commit messages based on the provided git diff."
        },
        {
          "role": "user",
          "content": "$diff"
        }
      ],
      "temperature": 0.3
}
EOF
    )
    commit_message=$(echo "$response" | grep '"content":' | cut -d '"' -f 4)
    echo "Generated commit message: $commit_message"
    git commit -m "$commit_message"
}
 

Security cameras from desktop

 Need to install ffmpeg in order to access rstp streams

* sudp apt install ffmpeg

Once it is installed, you can access the cameras via

* ffplay rtsp://hpatil:<pass>@<ip_address>:554/stream1

More than one ssh key for the github

 * Generate new key:

[18:05:20 harsshal@dell:~/projects]$ ssh-keygen -t ed25519 -C "harsshal@gmail.com"

* Add new key in the ssh config

[18:07:35 harsshal@dell:~/projects]$ cat ~/.ssh/config 

TCPKeepAlive yes

Host 10.234.1.112

  HostName 10.234.1.112

  User harshal

# Default GitHub

Host github.com

  HostName github.com

  User git

  IdentityFile ~/.ssh/id_rsa

Host github-public

  HostName github.com

  User git

  IdentityFile ~/.ssh/id_ed25519.pub

Host github-personal

  HostName github.com

  User git

  IdentityFile ~/.ssh/id_ed25519

* Clone the repo

[18:09:02 harsshal@dell:~/projects]$ git clone git@github-personal:harsshal/icarus_gl.git

Jupyter notebook setup

jupyter notebook password

cat ~/.ipython/profile_default/startup/start.ipy

import os

import dotenv

dotenv.load_dotenv('/home/'+os.environ['LOGNAME']+'/.env',override=True)

import pandas as pd

# Pandas options

pd.options.display.max_columns = None

pd.options.display.max_rows = None

pd.options.display.max_colwidth = None

          pd.options.display.float_format = '{:,.2f}'.format

print("Everything loaded")

jupyter notebook --notebook-dir [LOCATION] --no-browser --ip=192.168.255.X

jupyter nbconvert --execute --to html notebook.ipynb

Installing a module directly from repo

pip install git+https://github.com/blampe/IbPy.git

pip install git+https://github.com/atreyuxtrading/atreyu-backtrader-api.git

command line / bash variable in awk command

 This is how we use a command line / bash variable (named num) in a awk command. We define an awk  variable 'var' with -v option. This also shows use of BEGIN block.

awk -F, -v var=$num 'BEGIN{srand(var)} {print $1","$2","rand()}' file_name 

Change nameserver entries in resolve.conf

 We can directly change the contents of the file but they dont seem to be in effect. So I added Google's nameserver in the file as follows : 

$ sudo cat /etc/resolvconf/resolv.conf.d/base 

nameserver 8.8.8.8

nameserver 8.8.4.4

And then updated the file as follows : 

$ sudo resolvconf -u 

we can also just update /etc/resolve.conf and it will be in effect immediately.

$ sudo sed -i '1 i\nameserver 8.8.8.8\nnameserver 8.8.4.4' /etc/resolv.conf 

To remove the changes :

$ sudo sed -i '1,2d' /etc/resolv.conf 

renaming all the files in a folder

 IF we want to rename all the files with a part of the file we can do something following:

for file in $(ls); do nn=$(echo $file | awk -F'_' '{print($2)}'); mv $file $nn; done

shell loop through dates

 Easy command to loop through the dates : 

for i in 2022-01-{01..31} 2022-02-{01..15}; do echo $i; done

More comprehensive command :

d=2015-01-01
while [ "$d" != 2015-02-20 ]; do 
  echo $d
  d=$(date -I -d "$d + 1 day")
done

tp-link archer t3u on ubuntu

Recently got tp-link T3u mini wifi adapter  but as usual ubuntu did not have its drivers. So executed following commands and it worked perfectly. 

cd /opt 

git clone https://github.com/cilynx/rtl88x2bu.git 

cd rtl88x2bu

VER=$(sed -n 's/\PACKAGE_VERSION="\(.*\)"/\1/p' dkms.conf)

sudo rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}

sudo dkms add -m rtl88x2bu -v ${VER}

sudo dkms build -m rtl88x2bu -v ${VER}

sudo dkms install -m rtl88x2bu -v ${VER}

sudo modprobe 88x2bu

sudo access to ldap user

 Typically, if you dont have sudo and "gain" sudo access, you cant just add yourself to sudo group. In that scenario, we need to reboot in "advanced mode" and gain access to root shell. Once in, you can have following : 

$ sudo cat /etc/sudoers.d/hpatil 

hpatil ALL=(ALL) ALL

and then we will have sudo access. 

Bootable USB

In case your laptop has good old booting system and not advanced system like UEFI, you can use following command to create bootable USB. In case your laptop is fancy, you will have to use software like Rufus which works only on "amazing" windows.

sudo dd bs=4M if=~/Downloads/ of=/dev/sdc1 status=progress oflag=sync

you can find out /dev/sdc1 via df command.

Highlight mouse with win + F5

When you have multiple monitors, and we need to search for a mouse, it becomes difficult to see where its hiding. Windows had a good feature to highlight mouse when you press Ctrl, but linux typically dont have that. So I used following workaround to achieve same effect in i3.

sudo apt install libx11-dev libxcomposite-dev libxdamage-dev libxrender-dev
mkdir ~/git
cd git
git clone https://github.com/Carpetsmoker/find-cursor.git
cd find-cursor
make
echo "bindsym $mod+F5 exec /home/maahi/git/find-cursor/find-cursor -of" >> ~/.config/i3/config

docker commands

A while ago, I was playing around with docker. Here is the collection of all the commands I used. I used following to install dockers:

sudo echo 'deb https://apt.dockerproject.org/repo debian-stretch main' > /etc/apt/sources.list.d/dockertemp.list
sudo apt-get update
sudo apt-get install docker-engine
sudo rm /etc/apt/sources.list.d/dockertemp.list sudo service docker start

 Once installation was done, these were basic commands I used :

https://sakuli.readthedocs.io/en/v1.0.0/docker-containers/
sudo docker pull harsshal/tws:first
sudo docker run -it -p 5901:5901 -p 8000:6901 harsshal/tws:first
sudo docker run -it -p 5901:5901 -p 8000:6901 -exec -u 0 harsshal/tws:first /bin/bash
sudo docker run -it -p 5901:5901 -p 8000:6901 -e "VNC_PW=ibtrader" harsshal/tws:first
sudo docker ps -a
sudo docker start
sudo docker commit harsshal/tws:second
sudo docker push harsshal/tws:second
sudo docker images
sudo docker ps -a | awk '{print $1}' | xargs sudo docker rm

Display all dataframe lines in ipython / jupyter notebook

Sometimes when you want to see all lines in ipython, either in IDE or in notebook, it wont show you because of in-build options. Here are those options, in case you want to change that :

import pandas as pd
pd.set_option('display.max_rows', None)
pd.set_option('display.max_columns', None)
pd.set_option('display.width', 1000)