Curl Command Cheatsheet For DevOps Engineers

As a DevOps professional, the curl command is an essential tool in your arsenal. From making API calls to troubleshooting network issues, curl is a swiss army knife that every DevOps engineer should master.

This Curl Cheatsheet covers:

Basic curl syntax and options
Sending GET, POST, PUT, and DELETE requests
Handling headers, cookies, and authentication
Downloading files and saving output to a file
Debugging network problems with curl
Automating curl commands in scripts

You Should Know:

1. Basic curl syntax:

curl [options] [URL]

2. Sending GET requests:

curl https://api.example.com/data

3. Sending POST requests with data:

curl -X POST -d "param1=value1&param2=value2" https://api.example.com/data

4. Sending PUT requests:

curl -X PUT -d "param1=value1" https://api.example.com/data/1

5. Sending DELETE requests:

curl -X DELETE https://api.example.com/data/1

6. Handling headers:

curl -H "Content-Type: application/json" https://api.example.com/data

7. Handling cookies:

curl -b "cookie_name=cookie_value" https://api.example.com/data

8. Downloading files:

curl -O https://example.com/file.zip

9. Saving output to a file:

curl -o output.txt https://example.com/data

10. Debugging network problems:

curl -v https://example.com

11. Automating curl commands in scripts:

#!/bin/bash
response=$(curl -s -o /dev/null -w "%{http_code}" https://example.com)
if [ "$response" -eq 200 ]; then
echo "Success"
else
echo "Failed"
fi

What Undercode Say:

Mastering the curl command is crucial for any DevOps engineer. It not only helps in interacting with APIs but also in troubleshooting network issues, downloading files, and automating tasks. Here are some additional Linux and Windows commands that can complement your DevOps toolkit:

Linux:
Check network connectivity:
```
ping example.com
```
Check open ports:
```
netstat -tuln
```
Monitor system processes:
```
top
```
Search for files:
```
find /path/to/dir -name "filename"
```
Compress files:
```
tar -czvf archive.tar.gz /path/to/dir
```
Windows:
Check network connectivity:
```
ping example.com
```
Check open ports:
```
netstat -an
```
Monitor system processes:
```
tasklist
```
Search for files:
```
dir /s /p "filename"
```

Compress files:

compact /c /s /i /a /q /exe:lzx "C:\path\to\dir"

By integrating these commands into your workflow, you can enhance your efficiency and effectiveness as a DevOps engineer. For more detailed information on curl, you can refer to the official curl documentation.

References:

Reported By: Neelcshah Curl – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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