Find and Kill Processes by Name

#!/bin/bash

# Function to display usage
usage() {
  echo "Usage: $0 <process_name> [signal]"
  echo "  <process_name>: The name or a unique part of the process command line to search for."
  echo "  [signal]: Optional. The signal to send (e.g., SIGTERM, SIGKILL, 9 for KILL). Default is SIGTERM."
  exit 1
}

# Check for required arguments
if [ -z "$1" ]; then
  usage
fi

PROCESS_NAME="$1"
SIGNAL=${2:-"SIGTERM"} # Default to SIGTERM if no signal is provided

echo "Searching for processes matching: '$PROCESS_NAME'"

# Find PIDs using pgrep -f (full command line match)
PIDS=$(pgrep -f "$PROCESS_NAME")

if [ -z "$PIDS" ]; then
  echo "No processes found matching '$PROCESS_NAME'."
else
  echo "Found processes for '$PROCESS_NAME' with PIDs:"
  echo "$PIDS" | while read PID; do
    ps -p "$PID" -o pid,user,etime,command --no-headers
  done
  
  read -rp "Do you want to kill these processes with signal $SIGNAL? (y/N) " CONFIRM
  if [[ "$CONFIRM" =~ ^[yY]$ ]]; then
    echo "Sending $SIGNAL to PIDs: $PIDS"
    kill -s "$SIGNAL" "$PIDS"
    if [ $? -eq 0 ]; then
      echo "Successfully sent $SIGNAL to processes."
    else
      echo "ERROR: Failed to send $SIGNAL to some processes."
      exit 1
    fi
  else
    echo "Operation cancelled by user."
  fi
fi