75 lines
1.4 KiB
Markdown
75 lines
1.4 KiB
Markdown
# 🗡️ Kill Command
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The `kill` command is used to **send signals to processes**, typically to terminate or control them.
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```bash
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kill [options] <PID>
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```
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📌 Replace `<PID>` with the Process ID of the target process.
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---
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## 🚦 Common `kill` Usage Examples
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### 💤 Graceful Termination — `SIGTERM` (Signal 15)
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```bash
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kill 123
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```
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✅ Politely asks the process to terminate.
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*Allows the process to clean up before exiting.*
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---
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### 🪓 Force Kill — `SIGKILL` (Signal 9)
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```bash
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kill -9 123
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```
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💥 **Immediate termination**.
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*Doesn’t allow cleanup — use only when necessary.*
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🗡️ *Think of it as the "katana" of kill commands.*
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### 📑 Multi Process Kill
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```bash
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pidof <ps-name> | xargs kill -9
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```
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---
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### ⌨️ Interrupt — `SIGINT` (Signal 2)
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```bash
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kill -2 123
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```
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🛑 Mimics pressing `Ctrl + C`.
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*Often used to stop processes gracefully from the terminal.*
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---
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### 🔄 Hangup — `SIGHUP` (Signal 1)
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```bash
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kill -1 123
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```
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♻️ Requests the process to **reload or restart**.
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*Commonly used for daemons or services to reload configs.*
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---
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## 📋 Summary of Signals
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| Signal | Name | Description |
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| ------ | --------- | ------------------------------ |
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| `1` | `SIGHUP` | Reload configuration / restart |
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| `2` | `SIGINT` | Interrupt (like Ctrl + C) |
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| `9` | `SIGKILL` | Force kill (cannot be ignored) |
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| `15` | `SIGTERM` | Graceful termination (default) |
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