Menu
Complete Linux administration skill covering process management, filesystem, permissions, package management, users, bash scripting, and system monitoring.
| name | linux-fundamentals-skill |
| description | Complete Linux administration skill covering process management, filesystem, permissions, package management, users, bash scripting, and system monitoring. |
| sasmp_version | 1.3.0 |
| bonded_agent | 01-devops-fundamentals |
| bond_type | PRIMARY_BOND |
| parameters | [{"name":"distro","type":"string","required":false,"default":"ubuntu","validation":"^(ubuntu|debian|centos|rhel|fedora|arch)$"},{"name":"operation","type":"string","required":true,"enum":["process","filesystem","permissions","package","user","script","monitor"]}] |
| retry_config | {"strategy":"exponential_backoff","initial_delay_ms":1000,"max_retries":3} |
| observability | {"logging":"structured","metrics":"enabled"} |
Master Linux system administration - the foundation of DevOps.
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
| distro | string | No | ubuntu | Target distribution |
| operation | string | Yes | - | Operation category |
# Process Management
ps aux | grep [p]rocess # Find process (avoid grep itself)
kill -15 PID # Graceful termination
kill -9 PID # Force kill (last resort)
pkill -f pattern # Kill by pattern
nohup command & # Background immune to hangup
# File Permissions
chmod 755 file # rwxr-xr-x
chmod u+x,g+r file # Symbolic notation
chown -R user:group dir/ # Recursive ownership
setfacl -m u:user:rw file # Set ACL
# Package Management (Debian/Ubuntu)
apt update && apt upgrade -y
apt install -y package
apt autoremove
# Package Management (RHEL/CentOS)
dnf update -y
dnf install package
# User Management
useradd -m -s /bin/bash user
usermod -aG sudo user
passwd user
# System Info
uname -a # Kernel info
cat /etc/os-release # OS version
free -h # Memory usage
df -h # Disk usage
| Symptom | Root Cause | Solution |
|---|---|---|
| Permission denied | Insufficient privileges | Use sudo or check ownership |
| Command not found | Package not installed | Install with apt/dnf |
| No space left | Disk full | Clean /var/log, docker prune |
| High load | CPU/IO bottleneck | Use top, iotop |
id, ls -ladf -h, du -sh /*free -hjournalctl -xedu -sh /* | sort -rh | headapt cleanjournalctl --vacuum-size=100MDevOps scripting with Bash, Python, and Go for automation, tooling, and infrastructure management
CI/CD pipelines with Git, GitHub Actions, GitLab CI, Jenkins, and deployment strategies.
Cloud infrastructure with AWS, Azure, GCP - architecture, services, security, and cost optimization.
Docker and Kubernetes - containerization, orchestration, and production deployment.
Infrastructure as Code with Terraform, Ansible, and CloudFormation.
Monitoring and observability with Prometheus, Grafana, ELK Stack, and distributed tracing.