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added loginspection command #7

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rakib1620 merged 1 commit into from
May 25, 2026
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added loginspection command #7

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11 changes: 10 additions & 1 deletion basic-commands.md
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Expand Up @@ -85,4 +85,13 @@ Essential commands used daily by DevOps and Cloud Engineers for secure remote se
| :--- | :--- | :--- |
| `sudo apt update && sudo apt upgrade -y` | Update package lists and upgrade all installed packages | Patching server vulnerabilities right after launching an instance. |
| `sudo apt install -y docker.io` | Install a package automatically without confirmation prompts | Used inside CI/CD provisioning scripts for silent automation. |
| `sudo apt autoremove -y` | Remove unused packages and leftover dependencies | Cleaning up disk space on staging or production servers. |
| `sudo apt autoremove -y` | Remove unused packages and leftover dependencies | Cleaning up disk space on staging or production servers. |

## 🔎 8. Log Inspection & Troubleshooting

| Command | Description | DevOps Real-Life Use Case |
| :--- | :--- | :--- |
| `journalctl -u docker.service -n 50` | View the last 50 log lines of a specific systemd service | Debugging container runtime errors when Docker crashes. |
| `journalctl -xe` | Show system logs trailing with extension details on failure | Finding root causes when `systemctl start` fails. |
| `tail -f /var/log/nginx/access.log` | Stream and monitor log files in real-time | Tracking live user traffic or identifying active DDOS attacks. |
| `grep -ri "fatal" /var/log/` | Search for a specific string inside all files recursively | Scanning heavy log directories for hidden application errors. |
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