network-tools

Name: network-tools
Author: chaterm

181installs12forks

How to install network-tools?

chaterm/terminal-skills/network-tools

$npx -y skills add chaterm/terminal-skills --skill network-tools

Installs into the current project.

Summary

Linux network tools and diagnostics

Files · 1

View on GitHub

SKILL.md

1	# Network Tools and Diagnostics
2
3	## Overview
4	Linux network diagnostics, port scanning, traffic analysis and other tool usage skills.
5
6	## Network Configuration
7
8	### View Configuration
9	```bash
10	# IP address
11	ip addr
12	ip a
13	ifconfig # Legacy command
14
15	# Routing table
16	ip route
17	route -n
18	netstat -rn
19
20	# DNS configuration
21	cat /etc/resolv.conf
22	systemd-resolve --status
23	```
24
25	### Configure Network
26	```bash
27	# Temporary IP configuration
28	ip addr add 192.168.1.100/24 dev eth0
29	ip addr del 192.168.1.100/24 dev eth0
30
31	# Enable/Disable interface
32	ip link set eth0 up
33	ip link set eth0 down
34
35	# Add route
36	ip route add 10.0.0.0/8 via 192.168.1.1
37	ip route del 10.0.0.0/8
38	```
39
40	## Connectivity Testing
41
42	### ping
43	```bash
44	ping hostname
45	ping -c 4 hostname # Send 4 packets
46	ping -i 0.2 hostname # 0.2 second interval
47	ping -s 1000 hostname # Specify packet size
48	```
49
50	### traceroute
51	```bash
52	traceroute hostname
53	traceroute -n hostname # Don't resolve hostnames
54	traceroute -T hostname # Use TCP
55	mtr hostname # Real-time trace
56	```
57
58	### DNS Query
59	```bash
60	nslookup hostname
61	dig hostname
62	dig +short hostname
63	dig @8.8.8.8 hostname # Specify DNS server
64	host hostname
65	```
66
67	## Ports and Connections
68
69	### ss Command (Recommended)
70	```bash
71	# Listening ports
72	ss -tlnp # TCP listening
73	ss -ulnp # UDP listening
74	ss -tlnp \| grep :80
75
76	# All connections
77	ss -tanp # TCP connections
78	ss -s # Statistics
79
80	# Filter
81	ss -t state established
82	ss -t dst 192.168.1.1
83	ss -t sport = :80
84	```
85
86	### netstat Command
87	```bash
88	netstat -tlnp # TCP listening
89	netstat -ulnp # UDP listening
90	netstat -anp # All connections
91	netstat -s # Statistics
92	```
93
94	### lsof Network
95	```bash
96	lsof -i # All network connections
97	lsof -i :80 # Specific port
98	lsof -i tcp # TCP connections
99	lsof -i @192.168.1.1 # Specific host
100	```
101
102	## HTTP Tools
103
104	### curl
105	```bash
106	# Basic request
107	curl http://example.com
108	curl -I http://example.com # Headers only
109	curl -v http://example.com # Verbose output
110
111	# POST request
112	curl -X POST -d "data=value" http://example.com
113	curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' http://example.com
114
115	# Download
116	curl -O http://example.com/file.zip
117	curl -o output.zip http://example.com/file.zip
118
119	# Authentication
120	curl -u user:pass http://example.com
121	curl -H "Authorization: Bearer token" http://example.com
122	```
123
124	### wget
125	```bash
126	wget http://example.com/file.zip
127	wget -c http://example.com/file.zip # Resume download
128	wget -r http://example.com # Recursive download
129	wget --mirror http://example.com # Mirror site
130	```
131
132	## Packet Capture
133
134	### tcpdump
135	```bash
136	# Basic capture
137	tcpdump -i eth0
138	tcpdump -i any
139
140	# Filter
141	tcpdump -i eth0 port 80
142	tcpdump -i eth0 host 192.168.1.1
143	tcpdump -i eth0 'tcp port 80 and host 192.168.1.1'
144
145	# Save/Read
146	tcpdump -i eth0 -w capture.pcap
147	tcpdump -r capture.pcap
148
149	# Display content
150	tcpdump -i eth0 -A port 80 # ASCII
151	tcpdump -i eth0 -X port 80 # Hexadecimal
152	```
153
154	### Traffic Monitoring
155	```bash
156	# Real-time traffic
157	iftop
158	iftop -i eth0
159
160	# By process
161	nethogs
162	nethogs eth0
163
164	# Bandwidth test
165	iperf3 -s # Server
166	iperf3 -c server_ip # Client
167	```
168
169	## Common Scenarios
170
171	### Scenario 1: Troubleshoot Port Usage
172	```bash
173	# Check port usage
174	ss -tlnp \| grep :8080
175	lsof -i :8080
176
177	# Find process and handle
178	kill -9 PID
179	# Or
180	fuser -k 8080/tcp
181	```
182
183	### Scenario 2: Test Service Connectivity
184	```bash
185	# TCP port test
186	nc -zv hostname 80
187	telnet hostname 80
188
189	# HTTP service test
190	curl -I http://hostname
191	curl -w "HTTP Code: %{http_code}\nTime: %{time_total}s\n" -o /dev/null -s http://hostname
192	```
193
194	### Scenario 3: Network Performance Diagnosis
195	```bash
196	# Latency test
197	ping -c 100 hostname \| tail -1
198
199	# Route analysis
200	mtr --report hostname
201
202	# Bandwidth test
203	iperf3 -c server -t 30
204	```
205
206	## Troubleshooting
207
208	\| Problem \| Solution \|
209	\|---------\|----------\|
210	\| Network unreachable \| `ping`, `traceroute`, check routing \|
211	\| DNS resolution failed \| `dig`, `nslookup`, check resolv.conf \|
212	\| Port unreachable \| `ss -tlnp`, check firewall \|
213	\| Connection timeout \| `mtr`, `tcpdump` packet capture \|
214	\| Insufficient bandwidth \| `iftop`, `iperf3` test \|

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network-tools

181installs12forks

View on GitHub

How to install network-tools?

chaterm/terminal-skills/network-tools

$npx -y skills add chaterm/terminal-skills --skill network-tools

Installs into the current project.

Summary

Linux network tools and diagnostics

Files · 1

View on GitHub

SKILL.md

1	# Network Tools and Diagnostics
2
3	## Overview
4	Linux network diagnostics, port scanning, traffic analysis and other tool usage skills.
5
6	## Network Configuration
7
8	### View Configuration
9	```bash
10	# IP address
11	ip addr
12	ip a
13	ifconfig # Legacy command
14
15	# Routing table
16	ip route
17	route -n
18	netstat -rn
19
20	# DNS configuration
21	cat /etc/resolv.conf
22	systemd-resolve --status
23	```
24
25	### Configure Network
26	```bash
27	# Temporary IP configuration
28	ip addr add 192.168.1.100/24 dev eth0
29	ip addr del 192.168.1.100/24 dev eth0
30
31	# Enable/Disable interface
32	ip link set eth0 up
33	ip link set eth0 down
34
35	# Add route
36	ip route add 10.0.0.0/8 via 192.168.1.1
37	ip route del 10.0.0.0/8
38	```
39
40	## Connectivity Testing
41
42	### ping
43	```bash
44	ping hostname
45	ping -c 4 hostname # Send 4 packets
46	ping -i 0.2 hostname # 0.2 second interval
47	ping -s 1000 hostname # Specify packet size
48	```
49
50	### traceroute
51	```bash
52	traceroute hostname
53	traceroute -n hostname # Don't resolve hostnames
54	traceroute -T hostname # Use TCP
55	mtr hostname # Real-time trace
56	```
57
58	### DNS Query
59	```bash
60	nslookup hostname
61	dig hostname
62	dig +short hostname
63	dig @8.8.8.8 hostname # Specify DNS server
64	host hostname
65	```
66
67	## Ports and Connections
68
69	### ss Command (Recommended)
70	```bash
71	# Listening ports
72	ss -tlnp # TCP listening
73	ss -ulnp # UDP listening
74	ss -tlnp \| grep :80
75
76	# All connections
77	ss -tanp # TCP connections
78	ss -s # Statistics
79
80	# Filter
81	ss -t state established
82	ss -t dst 192.168.1.1
83	ss -t sport = :80
84	```
85
86	### netstat Command
87	```bash
88	netstat -tlnp # TCP listening
89	netstat -ulnp # UDP listening
90	netstat -anp # All connections
91	netstat -s # Statistics
92	```
93
94	### lsof Network
95	```bash
96	lsof -i # All network connections
97	lsof -i :80 # Specific port
98	lsof -i tcp # TCP connections
99	lsof -i @192.168.1.1 # Specific host
100	```
101
102	## HTTP Tools
103
104	### curl
105	```bash
106	# Basic request
107	curl http://example.com
108	curl -I http://example.com # Headers only
109	curl -v http://example.com # Verbose output
110
111	# POST request
112	curl -X POST -d "data=value" http://example.com
113	curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' http://example.com
114
115	# Download
116	curl -O http://example.com/file.zip
117	curl -o output.zip http://example.com/file.zip
118
119	# Authentication
120	curl -u user:pass http://example.com
121	curl -H "Authorization: Bearer token" http://example.com
122	```
123
124	### wget
125	```bash
126	wget http://example.com/file.zip
127	wget -c http://example.com/file.zip # Resume download
128	wget -r http://example.com # Recursive download
129	wget --mirror http://example.com # Mirror site
130	```
131
132	## Packet Capture
133
134	### tcpdump
135	```bash
136	# Basic capture
137	tcpdump -i eth0
138	tcpdump -i any
139
140	# Filter
141	tcpdump -i eth0 port 80
142	tcpdump -i eth0 host 192.168.1.1
143	tcpdump -i eth0 'tcp port 80 and host 192.168.1.1'
144
145	# Save/Read
146	tcpdump -i eth0 -w capture.pcap
147	tcpdump -r capture.pcap
148
149	# Display content
150	tcpdump -i eth0 -A port 80 # ASCII
151	tcpdump -i eth0 -X port 80 # Hexadecimal
152	```
153
154	### Traffic Monitoring
155	```bash
156	# Real-time traffic
157	iftop
158	iftop -i eth0
159
160	# By process
161	nethogs
162	nethogs eth0
163
164	# Bandwidth test
165	iperf3 -s # Server
166	iperf3 -c server_ip # Client
167	```
168
169	## Common Scenarios
170
171	### Scenario 1: Troubleshoot Port Usage
172	```bash
173	# Check port usage
174	ss -tlnp \| grep :8080
175	lsof -i :8080
176
177	# Find process and handle
178	kill -9 PID
179	# Or
180	fuser -k 8080/tcp
181	```
182
183	### Scenario 2: Test Service Connectivity
184	```bash
185	# TCP port test
186	nc -zv hostname 80
187	telnet hostname 80
188
189	# HTTP service test
190	curl -I http://hostname
191	curl -w "HTTP Code: %{http_code}\nTime: %{time_total}s\n" -o /dev/null -s http://hostname
192	```
193
194	### Scenario 3: Network Performance Diagnosis
195	```bash
196	# Latency test
197	ping -c 100 hostname \| tail -1
198
199	# Route analysis
200	mtr --report hostname
201
202	# Bandwidth test
203	iperf3 -c server -t 30
204	```
205
206	## Troubleshooting
207
208	\| Problem \| Solution \|
209	\|---------\|----------\|
210	\| Network unreachable \| `ping`, `traceroute`, check routing \|
211	\| DNS resolution failed \| `dig`, `nslookup`, check resolv.conf \|
212	\| Port unreachable \| `ss -tlnp`, check firewall \|
213	\| Connection timeout \| `mtr`, `tcpdump` packet capture \|
214	\| Insufficient bandwidth \| `iftop`, `iperf3` test \|

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