administering-linux

Name: administering-linux
Author: ancoleman

184installs59forks

How to install administering-linux?

ancoleman/ai-design-components/administering-linux

$npx -y skills add ancoleman/ai-design-components --skill administering-linux

Installs into the current project.

Summary

Manage Linux systems covering systemd services, process management, filesystems, networking, performance tuning, and troubleshooting. Use when deploying applications, optimizing server performance, diagnosing production issues, or managing users and security on Linux servers.

Files · 1

View on GitHub

SKILL.md

1	# Linux Administration
2
3	Comprehensive Linux system administration for managing servers, deploying applications, and troubleshooting production issues in modern cloud-native environments.
4
5	## Purpose
6
7	This skill teaches fundamental and intermediate Linux administration for DevOps engineers, SREs, backend developers, and platform engineers. Focus on systemd-based distributions (Ubuntu, RHEL, Debian, Fedora) covering service management, process monitoring, filesystem operations, user administration, performance tuning, log analysis, and network configuration.
8
9	Modern infrastructure requires solid Linux fundamentals even with containerization. Container hosts run Linux, Kubernetes nodes need optimization, and troubleshooting production issues requires understanding systemd, processes, and logs.
10
11	Not Covered:
12	- Advanced networking (BGP, OSPF) - see `network-architecture` skill
13	- Deep security hardening (compliance, pentesting) - see `security-hardening` skill
14	- Configuration management at scale (Ansible, Puppet) - see `configuration-management` skill
15	- Container orchestration - see `kubernetes-operations` skill
16
17	## When to Use This Skill
18
19	Use when deploying custom applications, troubleshooting slow systems, investigating service failures, optimizing workloads, managing users, configuring SSH, monitoring disk space, scheduling tasks, diagnosing network issues, or applying performance tuning.
20
21	## Quick Start
22
23	### Essential Commands
24
25	Service Management:
26	```bash
27	systemctl start nginx # Start service
28	systemctl stop nginx # Stop service
29	systemctl restart nginx # Restart service
30	systemctl status nginx # Check status
31	systemctl enable nginx # Enable at boot
32	journalctl -u nginx -f # Follow service logs
33	```
34
35	Process Monitoring:
36	```bash
37	top # Interactive process monitor
38	htop # Enhanced process monitor
39	ps aux \| grep process_name # Find specific process
40	kill -15 PID # Graceful shutdown (SIGTERM)
41	kill -9 PID # Force kill (SIGKILL)
42	```
43
44	Disk Usage:
45	```bash
46	df -h # Filesystem usage
47	du -sh /path/to/dir # Directory size
48	ncdu /path # Interactive disk analyzer
49	```
50
51	Log Analysis:
52	```bash
53	journalctl -f # Follow all logs
54	journalctl -u service -f # Follow service logs
55	journalctl --since "1 hour ago" # Filter by time
56	journalctl -p err # Show errors only
57	```
58
59	User Management:
60	```bash
61	useradd -m -s /bin/bash username # Create user with home dir
62	passwd username # Set password
63	usermod -aG sudo username # Add to sudo group
64	userdel -r username # Delete user and home dir
65	```
66
67	## Core Concepts
68
69	### Systemd Architecture
70
71	Systemd is the standard init system and service manager. Systemd units define services, timers, targets, and other system resources.
72
73	Unit File Locations (priority order):
74	- `/etc/systemd/system/` - Custom units (highest priority)
75	- `/run/systemd/system/` - Runtime units (transient)
76	- `/lib/systemd/system/` - System-provided units (don't modify)
77
78	Key Unit Types: `.service` (services), `.timer` (scheduled tasks), `.target` (unit groups), `.socket` (socket-activated)
79
80	Essential systemctl Commands:
81	```bash
82	systemctl daemon-reload # Reload unit files after changes
83	systemctl list-units --type=service
84	systemctl list-timers # Show all timers
85	systemctl cat nginx.service # Show unit file content
86	systemctl edit nginx.service # Create override file
87	```
88
89	For detailed systemd reference, see `references/systemd-guide.md`.
90
91	### Process Management
92
93	Processes are running programs with unique PIDs. Understanding process states, signals, and resource usage is essential for troubleshooting.
94
95	Process States: R (running), S (sleeping), D (uninterruptible sleep/I/O), Z (zombie), T (stopped)
96
97	Common Signals: SIGTERM (15) graceful, SIGKILL (9) force, SIGHUP (1) reload config
98
99	Process Priority:
100	```bash
101	nice -n 10 command # Start with lower priority
102	renice -n 5 -p PID # Change priority of running process
103	```
104
105	### Filesystem Hierarchy
106
107	Essential directories: `/` (root), `/etc/` (config), `/var/` (variable data), `/opt/` (optional software), `/usr/` (user programs), `/home/` (user directories), `/tmp/` (temporary), `/boot/` (boot loader)
108
109	Filesystem Types Quick Reference:
110	- ext4 - General purpose (default)
111	- XFS - Large files, databases (RHEL default)
112	- Btrfs - Sn

People who liked this also viewed

6 picks

Type

administering-linux

184installs59forks

View on GitHub

How to install administering-linux?

ancoleman/ai-design-components/administering-linux

$npx -y skills add ancoleman/ai-design-components --skill administering-linux

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Linux Administration
2
3	Comprehensive Linux system administration for managing servers, deploying applications, and troubleshooting production issues in modern cloud-native environments.
4
5	## Purpose
6
7	This skill teaches fundamental and intermediate Linux administration for DevOps engineers, SREs, backend developers, and platform engineers. Focus on systemd-based distributions (Ubuntu, RHEL, Debian, Fedora) covering service management, process monitoring, filesystem operations, user administration, performance tuning, log analysis, and network configuration.
8
9	Modern infrastructure requires solid Linux fundamentals even with containerization. Container hosts run Linux, Kubernetes nodes need optimization, and troubleshooting production issues requires understanding systemd, processes, and logs.
10
11	Not Covered:
12	- Advanced networking (BGP, OSPF) - see `network-architecture` skill
13	- Deep security hardening (compliance, pentesting) - see `security-hardening` skill
14	- Configuration management at scale (Ansible, Puppet) - see `configuration-management` skill
15	- Container orchestration - see `kubernetes-operations` skill
16
17	## When to Use This Skill
18
19	Use when deploying custom applications, troubleshooting slow systems, investigating service failures, optimizing workloads, managing users, configuring SSH, monitoring disk space, scheduling tasks, diagnosing network issues, or applying performance tuning.
20
21	## Quick Start
22
23	### Essential Commands
24
25	Service Management:
26	```bash
27	systemctl start nginx # Start service
28	systemctl stop nginx # Stop service
29	systemctl restart nginx # Restart service
30	systemctl status nginx # Check status
31	systemctl enable nginx # Enable at boot
32	journalctl -u nginx -f # Follow service logs
33	```
34
35	Process Monitoring:
36	```bash
37	top # Interactive process monitor
38	htop # Enhanced process monitor
39	ps aux \| grep process_name # Find specific process
40	kill -15 PID # Graceful shutdown (SIGTERM)
41	kill -9 PID # Force kill (SIGKILL)
42	```
43
44	Disk Usage:
45	```bash
46	df -h # Filesystem usage
47	du -sh /path/to/dir # Directory size
48	ncdu /path # Interactive disk analyzer
49	```
50
51	Log Analysis:
52	```bash
53	journalctl -f # Follow all logs
54	journalctl -u service -f # Follow service logs
55	journalctl --since "1 hour ago" # Filter by time
56	journalctl -p err # Show errors only
57	```
58
59	User Management:
60	```bash
61	useradd -m -s /bin/bash username # Create user with home dir
62	passwd username # Set password
63	usermod -aG sudo username # Add to sudo group
64	userdel -r username # Delete user and home dir
65	```
66
67	## Core Concepts
68
69	### Systemd Architecture
70
71	Systemd is the standard init system and service manager. Systemd units define services, timers, targets, and other system resources.
72
73	Unit File Locations (priority order):
74	- `/etc/systemd/system/` - Custom units (highest priority)
75	- `/run/systemd/system/` - Runtime units (transient)
76	- `/lib/systemd/system/` - System-provided units (don't modify)
77
78	Key Unit Types: `.service` (services), `.timer` (scheduled tasks), `.target` (unit groups), `.socket` (socket-activated)
79
80	Essential systemctl Commands:
81	```bash
82	systemctl daemon-reload # Reload unit files after changes
83	systemctl list-units --type=service
84	systemctl list-timers # Show all timers
85	systemctl cat nginx.service # Show unit file content
86	systemctl edit nginx.service # Create override file
87	```
88
89	For detailed systemd reference, see `references/systemd-guide.md`.
90
91	### Process Management
92
93	Processes are running programs with unique PIDs. Understanding process states, signals, and resource usage is essential for troubleshooting.
94
95	Process States: R (running), S (sleeping), D (uninterruptible sleep/I/O), Z (zombie), T (stopped)
96
97	Common Signals: SIGTERM (15) graceful, SIGKILL (9) force, SIGHUP (1) reload config
98
99	Process Priority:
100	```bash
101	nice -n 10 command # Start with lower priority
102	renice -n 5 -p PID # Change priority of running process
103	```
104
105	### Filesystem Hierarchy
106
107	Essential directories: `/` (root), `/etc/` (config), `/var/` (variable data), `/opt/` (optional software), `/usr/` (user programs), `/home/` (user directories), `/tmp/` (temporary), `/boot/` (boot loader)
108
109	Filesystem Types Quick Reference:
110	- ext4 - General purpose (default)
111	- XFS - Large files, databases (RHEL default)
112	- Btrfs - Sn

People who liked this also viewed

6 picks

Type