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Sudip Bhandari sudipidus

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sudipidus / dedicated-session-history-tmux.sh
Created April 19, 2025 11:19
Maintaining separate history for each tmux session
# Often times I just want to run previous commands inside tmux sessions and keep a tab on what I was working just before
if [ -n "$TMUX" ]; then
# Get the tmux session name
session_name=$(tmux display-message -p '#S')
export HISTFILE="$HOME/.zsh_history_tmux_${session_name}"
fi
@sudipidus
sudipidus / gist:e9755e3274f2db09cefbd4a647733a0e
Created April 19, 2024 15:48
System Design: Scheduler
design a scheduler:
- schedule for a given time input->(fn, time)
- cron like schedule ( every night at 12:00 AM)
Functionality:
- configure
@sudipidus
sudipidus / gist:ad47624b29656e517ce0a1c7ff25faa9
Created March 5, 2024 07:15
Mac Kernel Panic (Catastrophic Error: Intel Hardware error), trigerred when I connected my phone to usb c port
panic(cpu 0 caller 0xfffffff0232dbf60): x86 CPU CATERR detected
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 21P3049
macOS version: 23D60
Kernel version: Darwin Kernel Version 23.3.0: Wed Dec 20 22:31:16 PST 2023; root:xnu-10002.81.5~10/RELEASE_ARM64_T8010
KernelCache UUID: 5055C553638BB2B9A72F9B074650402D
Kernel UUID: 98C51133-18A2-37CC-8054-0C2A5A0CC992
Boot session UUID: 80B9AC50-63B4-46D2-919C-AE0F9CFBC614
@sudipidus
sudipidus / prime_sieve.go
Created January 27, 2024 17:24
parallel prime number sieve in golang
// Communication Sequential Process (CSP) - Tony Hoare
// Finding Prime numbers using sieve in parallel
package main
import "fmt"
func main() {
src := make(chan int)
@sudipidus
sudipidus / rabbit_mq_sender.go
Created January 6, 2022 08:02
go script to send events to rabbit mq
package main
import (
"fmt"
"log"
amqp "github.com/rabbitmq/amqp091-go"
)
func failOnError(err error, msg string) {
@sudipidus
sudipidus / offending_logs.sh
Last active May 27, 2019 14:20
This script is to filter out the most recurring log messages. I faced an issue where syslog was rapidly increasing (35 GB) in a single day. I have /var/log mounted on root partition and this space usage was causing issue. Courtesy: https://askubuntu.com/a/515152/309358
for log in /var/log/{dmesg,syslog,kern.log}; do
echo "${log} :"
sed -e 's/\[[^]]\+\]//' -e 's/.*[0-9]\{2\}:[0-9]\{2\}:[0-9]\{2\}//' ${log} \
| sort | uniq -c | sort -hr | head -10
done
@sudipidus
sudipidus / slack-me.py
Last active May 1, 2019 13:47
This is a simple python script to trigger a slack web hook. It can be triggerred by piping linux commands or by passing arguments. (Messages are delivered to the configured slack channel)
#!/usr/bin/python
import requests as r
import json
import sys
web_hook='' # slack web hook url
def send_message(msg):
payload={'text':msg}
one_man_army_hook=webhook
headers= {'Content-type': 'application/json'}
@sudipidus
sudipidus / filenameappender.sh
Created October 16, 2018 12:32
To append a serial number to all the files contained in a directory
files=$(ls | awk '{print $1}')
serial=1
for fn in $files; do
echo "the next file is $fn"
extension="${fn##*.}"
filename="${fn%.*}"
echo "serial is $serial"
echo "filename is $filename and extension is $extension"
newfilename=$filename$serial
echo "mv $filename.$extension $newfilename.$extension"
@sudipidus
sudipidus / pdf_downloader.sh
Created May 19, 2018 06:44
wget -r -P ./pdfs -A pdf /web_url_containing_links/
@sudipidus
sudipidus / logs.sh
Created January 24, 2018 07:12
#!/bin/bash
server="$1"
lines=100
echo server is $server
if [ "$#" -eq 2 ]; then
lines="$2"
fi
echo lines are $lines
logfile=/root/logs/staging$server/logfile.log
echo Opening $logfile