bash-linux

Name: bash-linux
Author: One-Man-Company

77stars16forks

How to install bash-linux?

one-man-company/skills-contextmanager/bash-linux

$npx -y skills add One-Man-Company/Skills-ContextManager --skill bash-linux

Installs into the current project.

Summary

Bash/Linux terminal patterns. Critical commands, piping, error handling, scripting. Use when working on macOS or Linux systems.

Files · 1

View on GitHub

SKILL.md

1	# Bash Linux Patterns
2
3	> Essential patterns for Bash on Linux/macOS.
4
5	---
6
7	## 1. Operator Syntax
8
9	### Chaining Commands
10
11	\| Operator \| Meaning \| Example \|
12	\|----------\|---------\|---------\|
13	\| `;` \| Run sequentially \| `cmd1; cmd2` \|
14	\| `&&` \| Run if previous succeeded \| `npm install && npm run dev` \|
15	\| `\\|\\|` \| Run if previous failed \| `npm test \\|\\| echo "Tests failed"` \|
16	\| `\\|` \| Pipe output \| `ls \\| grep ".js"` \|
17
18	---
19
20	## 2. File Operations
21
22	### Essential Commands
23
24	\| Task \| Command \|
25	\|------\|---------\|
26	\| List all \| `ls -la` \|
27	\| Find files \| `find . -name "*.js" -type f` \|
28	\| File content \| `cat file.txt` \|
29	\| First N lines \| `head -n 20 file.txt` \|
30	\| Last N lines \| `tail -n 20 file.txt` \|
31	\| Follow log \| `tail -f log.txt` \|
32	\| Search in files \| `grep -r "pattern" --include="*.js"` \|
33	\| File size \| `du -sh *` \|
34	\| Disk usage \| `df -h` \|
35
36	---
37
38	## 3. Process Management
39
40	\| Task \| Command \|
41	\|------\|---------\|
42	\| List processes \| `ps aux` \|
43	\| Find by name \| `ps aux \\| grep node` \|
44	\| Kill by PID \| `kill -9 <PID>` \|
45	\| Find port user \| `lsof -i :3000` \|
46	\| Kill port \| `kill -9 $(lsof -t -i :3000)` \|
47	\| Background \| `npm run dev &` \|
48	\| Jobs \| `jobs -l` \|
49	\| Bring to front \| `fg %1` \|
50
51	---
52
53	## 4. Text Processing
54
55	### Core Tools
56
57	\| Tool \| Purpose \| Example \|
58	\|------\|---------\|---------\|
59	\| `grep` \| Search \| `grep -rn "TODO" src/` \|
60	\| `sed` \| Replace \| `sed -i 's/old/new/g' file.txt` \|
61	\| `awk` \| Extract columns \| `awk '{print $1}' file.txt` \|
62	\| `cut` \| Cut fields \| `cut -d',' -f1 data.csv` \|
63	\| `sort` \| Sort lines \| `sort -u file.txt` \|
64	\| `uniq` \| Unique lines \| `sort file.txt \\| uniq -c` \|
65	\| `wc` \| Count \| `wc -l file.txt` \|
66
67	---
68
69	## 5. Environment Variables
70
71	\| Task \| Command \|
72	\|------\|---------\|
73	\| View all \| `env` or `printenv` \|
74	\| View one \| `echo $PATH` \|
75	\| Set temporary \| `export VAR="value"` \|
76	\| Set in script \| `VAR="value" command` \|
77	\| Add to PATH \| `export PATH="$PATH:/new/path"` \|
78
79	---
80
81	## 6. Network
82
83	\| Task \| Command \|
84	\|------\|---------\|
85	\| Download \| `curl -O https://example.com/file` \|
86	\| API request \| `curl -X GET https://api.example.com` \|
87	\| POST JSON \| `curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL` \|
88	\| Check port \| `nc -zv localhost 3000` \|
89	\| Network info \| `ifconfig` or `ip addr` \|
90
91	---
92
93	## 7. Script Template
94
95	```bash
96	#!/bin/bash
97	set -euo pipefail # Exit on error, undefined var, pipe fail
98
99	# Colors (optional)
100	RED='\033[0;31m'
101	GREEN='\033[0;32m'
102	NC='\033[0m'
103
104	# Script directory
105	SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
106
107	# Functions
108	log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
109	log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2; }
110
111	# Main
112	main() {
113	log_info "Starting..."
114	# Your logic here
115	log_info "Done!"
116	}
117
118	main "$@"
119	```
120
121	---
122
123	## 8. Common Patterns
124
125	### Check if command exists
126
127	```bash
128	if command -v node &> /dev/null; then
129	echo "Node is installed"
130	fi
131	```
132
133	### Default variable value
134
135	```bash
136	NAME=${1:-"default_value"}
137	```
138
139	### Read file line by line
140
141	```bash
142	while IFS= read -r line; do
143	echo "$line"
144	done < file.txt
145	```
146
147	### Loop over files
148
149	```bash
150	for file in *.js; do
151	echo "Processing $file"
152	done
153	```
154
155	---
156
157	## 9. Differences from PowerShell
158
159	\| Task \| PowerShell \| Bash \|
160	\|------\|------------\|------\|
161	\| List files \| `Get-ChildItem` \| `ls -la` \|
162	\| Find files \| `Get-ChildItem -Recurse` \| `find . -type f` \|
163	\| Environment \| `$env:VAR` \| `$VAR` \|
164	\| String concat \| `"$a$b"` \| `"$a$b"` (same) \|
165	\| Null check \| `if ($x)` \| `if [ -n "$x" ]` \|
166	\| Pipeline \| Object-based \| Text-based \|
167
168	---
169
170	## 10. Error Handling
171
172	### Set options
173
174	```bash
175	set -e # Exit on error
176	set -u # Exit on undefined variable
177	set -o pipefail # Exit on pipe failure
178	set -x # Debug: print commands
179	```
180
181	### Trap for cleanup
182
183	```bash
184	cleanup() {
185	echo "Cleaning up..."
186	rm -f /tmp/tempfile
187	}
188	trap cleanup EXIT
189	```
190
191	---
192
193	> Remember: Bash is text-based. Use `&&` for success chains, `set -e` for safety, and quote your variables!

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bash-linux

77stars16forks

View on GitHub

How to install bash-linux?

one-man-company/skills-contextmanager/bash-linux

$npx -y skills add One-Man-Company/Skills-ContextManager --skill bash-linux

Installs into the current project.

Summary

Bash/Linux terminal patterns. Critical commands, piping, error handling, scripting. Use when working on macOS or Linux systems.

Files · 1

View on GitHub

SKILL.md

1	# Bash Linux Patterns
2
3	> Essential patterns for Bash on Linux/macOS.
4
5	---
6
7	## 1. Operator Syntax
8
9	### Chaining Commands
10
11	\| Operator \| Meaning \| Example \|
12	\|----------\|---------\|---------\|
13	\| `;` \| Run sequentially \| `cmd1; cmd2` \|
14	\| `&&` \| Run if previous succeeded \| `npm install && npm run dev` \|
15	\| `\\|\\|` \| Run if previous failed \| `npm test \\|\\| echo "Tests failed"` \|
16	\| `\\|` \| Pipe output \| `ls \\| grep ".js"` \|
17
18	---
19
20	## 2. File Operations
21
22	### Essential Commands
23
24	\| Task \| Command \|
25	\|------\|---------\|
26	\| List all \| `ls -la` \|
27	\| Find files \| `find . -name "*.js" -type f` \|
28	\| File content \| `cat file.txt` \|
29	\| First N lines \| `head -n 20 file.txt` \|
30	\| Last N lines \| `tail -n 20 file.txt` \|
31	\| Follow log \| `tail -f log.txt` \|
32	\| Search in files \| `grep -r "pattern" --include="*.js"` \|
33	\| File size \| `du -sh *` \|
34	\| Disk usage \| `df -h` \|
35
36	---
37
38	## 3. Process Management
39
40	\| Task \| Command \|
41	\|------\|---------\|
42	\| List processes \| `ps aux` \|
43	\| Find by name \| `ps aux \\| grep node` \|
44	\| Kill by PID \| `kill -9 <PID>` \|
45	\| Find port user \| `lsof -i :3000` \|
46	\| Kill port \| `kill -9 $(lsof -t -i :3000)` \|
47	\| Background \| `npm run dev &` \|
48	\| Jobs \| `jobs -l` \|
49	\| Bring to front \| `fg %1` \|
50
51	---
52
53	## 4. Text Processing
54
55	### Core Tools
56
57	\| Tool \| Purpose \| Example \|
58	\|------\|---------\|---------\|
59	\| `grep` \| Search \| `grep -rn "TODO" src/` \|
60	\| `sed` \| Replace \| `sed -i 's/old/new/g' file.txt` \|
61	\| `awk` \| Extract columns \| `awk '{print $1}' file.txt` \|
62	\| `cut` \| Cut fields \| `cut -d',' -f1 data.csv` \|
63	\| `sort` \| Sort lines \| `sort -u file.txt` \|
64	\| `uniq` \| Unique lines \| `sort file.txt \\| uniq -c` \|
65	\| `wc` \| Count \| `wc -l file.txt` \|
66
67	---
68
69	## 5. Environment Variables
70
71	\| Task \| Command \|
72	\|------\|---------\|
73	\| View all \| `env` or `printenv` \|
74	\| View one \| `echo $PATH` \|
75	\| Set temporary \| `export VAR="value"` \|
76	\| Set in script \| `VAR="value" command` \|
77	\| Add to PATH \| `export PATH="$PATH:/new/path"` \|
78
79	---
80
81	## 6. Network
82
83	\| Task \| Command \|
84	\|------\|---------\|
85	\| Download \| `curl -O https://example.com/file` \|
86	\| API request \| `curl -X GET https://api.example.com` \|
87	\| POST JSON \| `curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL` \|
88	\| Check port \| `nc -zv localhost 3000` \|
89	\| Network info \| `ifconfig` or `ip addr` \|
90
91	---
92
93	## 7. Script Template
94
95	```bash
96	#!/bin/bash
97	set -euo pipefail # Exit on error, undefined var, pipe fail
98
99	# Colors (optional)
100	RED='\033[0;31m'
101	GREEN='\033[0;32m'
102	NC='\033[0m'
103
104	# Script directory
105	SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
106
107	# Functions
108	log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
109	log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2; }
110
111	# Main
112	main() {
113	log_info "Starting..."
114	# Your logic here
115	log_info "Done!"
116	}
117
118	main "$@"
119	```
120
121	---
122
123	## 8. Common Patterns
124
125	### Check if command exists
126
127	```bash
128	if command -v node &> /dev/null; then
129	echo "Node is installed"
130	fi
131	```
132
133	### Default variable value
134
135	```bash
136	NAME=${1:-"default_value"}
137	```
138
139	### Read file line by line
140
141	```bash
142	while IFS= read -r line; do
143	echo "$line"
144	done < file.txt
145	```
146
147	### Loop over files
148
149	```bash
150	for file in *.js; do
151	echo "Processing $file"
152	done
153	```
154
155	---
156
157	## 9. Differences from PowerShell
158
159	\| Task \| PowerShell \| Bash \|
160	\|------\|------------\|------\|
161	\| List files \| `Get-ChildItem` \| `ls -la` \|
162	\| Find files \| `Get-ChildItem -Recurse` \| `find . -type f` \|
163	\| Environment \| `$env:VAR` \| `$VAR` \|
164	\| String concat \| `"$a$b"` \| `"$a$b"` (same) \|
165	\| Null check \| `if ($x)` \| `if [ -n "$x" ]` \|
166	\| Pipeline \| Object-based \| Text-based \|
167
168	---
169
170	## 10. Error Handling
171
172	### Set options
173
174	```bash
175	set -e # Exit on error
176	set -u # Exit on undefined variable
177	set -o pipefail # Exit on pipe failure
178	set -x # Debug: print commands
179	```
180
181	### Trap for cleanup
182
183	```bash
184	cleanup() {
185	echo "Cleaning up..."
186	rm -f /tmp/tempfile
187	}
188	trap cleanup EXIT
189	```
190
191	---
192
193	> Remember: Bash is text-based. Use `&&` for success chains, `set -e` for safety, and quote your variables!

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6 picks

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