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bash

This demonstrates making an HTTP request with basic authentication using curl.


curl http://user:password@example.org/

external tools curlHTTP request basic authentication

bash

This demonstrates using curl to make an HTTP request through a proxy server.


curl --proxy http://proxy.example.org:4321 http://remote.example.org/

external tools curlHTTP request with proxy

bash

This code uses curl to send an HTTP GET request to a web server at a specified port.


curl http://www.example.org:1234/

external tools curlHTTP requests GET request

bash

This demonstrates using curl to make an HTTP request while overriding DNS resolution for a specific domain.


curl --resolve www.example.org:80:127.0.0.1 http://www.example.org/

external tools curlHTTP request with custom DNS resolution

bash

This demonstrates advanced debugging with curl by capturing detailed trace information of an HTTP request.


curl --trace-ascii d.txt --trace-ids http://example.com/

external tools curldebugging HTTP request tracing

bash

This demonstrates using curl to send an HTTP request and log detailed request/response traces with timestamps.


curl --trace-ascii d.txt --trace-time http://example.com/

external tools curlrequest tracing and debugging

bash

This demonstrates debugging HTTP requests using curl's --trace-ascii option to log detailed request and response traces.


curl --trace-ascii debugdump.txt http://www.example.com/

external tools curldebugging and tracing request tracing

bash

This demonstrates basic awk usage for extracting specific fields from text.


echo -e "hello world\nawk cheatsheet" | awk '{print $2}'

external tools awkfield extraction

bash

This demonstrates using the tee command to write output to both stdout and a file simultaneously.


echo "Log this" | tee logfile.txt

external tools teeoutput redirection

bash

This script finds all .txt files in the current directory and its subdirectories and deletes them.


find . -name "*.txt" -exec rm {} \;

external tools find

bash

This script demonstrates parallel execution by using xargs to run the sleep command in parallel for numbers 1 through 10, with up to 4 processes running simultaneously.


echo {1..10} | xargs -n 1 -P 4 sleep

external tools xargsparallel task execution

bash

This demonstrates extracting the second word from a string using awk.


echo "hello world" | awk '{print $2}'

external tools awkbasic field extraction

bash

This demonstrates listing and sorting directory contents in a user-friendly format using ls.


ls -lh --sort=time

external tools lssorting and formatting options

bash

This demonstrates comparing the output of two commands using diff and process substitution.


diff <(echo -e "12\n456") <(echo -e "123\n456")

external tools diffprocess substitution

bash

This demonstrates downloading multiple files from a website using curl with a range pattern.


curl "http://somewebsite.com/files[0001-0010].txt" -o "file_#1.txt"

external tools curlfile downloading range pattern

bash

This demonstrates profiling HTTP request timings using curl by measuring connection time, time to first byte, and total time for a request.


curl -w "Connect time: %{time_connect} Time to first byte: %{time_starttransfer} Total: %{time_total} \n" "http://example.com/1/endpoint" -s -o /dev/null

external tools curlHTTP request timing profiling

bash

This demonstrates calculating the logarithm of 100 with base 10 using the bc command.


echo 'l(100)/l(10)' | bc -l

external tools bcmathematical computation

bash

This demonstrates pattern matching and substitution using sed with a custom delimiter.


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|the \(.*\) dog|something else|p"

external tools sedpattern matching and substitution

bash

This code uses sed to extract and manipulate a substring from the input string. It captures the word before "dog" and prints a modified sentence: "What is the dog? lazy". This demonstrates pattern matching and substitution using sed.


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|.*the \(.*\) dog.*|What is the dog? \1|p"

external tools sed

bash

This demonstrates pattern matching and extraction using sed in Bash.


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|.*\(the .* dog\).*|\1|p"

external tools sedpattern matching and extraction

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bash

This demonstrates making an HTTP request with basic authentication using curl.


curl http://user:password@example.org/

external tools curlHTTP request basic authentication

bash

This demonstrates using curl to make an HTTP request through a proxy server.


curl --proxy http://proxy.example.org:4321 http://remote.example.org/

external tools curlHTTP request with proxy

bash

This code uses curl to send an HTTP GET request to a web server at a specified port.


curl http://www.example.org:1234/

external tools curlHTTP requests GET request

bash

This demonstrates using curl to make an HTTP request while overriding DNS resolution for a specific domain.


curl --resolve www.example.org:80:127.0.0.1 http://www.example.org/

external tools curlHTTP request with custom DNS resolution

bash

This demonstrates advanced debugging with curl by capturing detailed trace information of an HTTP request.


curl --trace-ascii d.txt --trace-ids http://example.com/

external tools curldebugging HTTP request tracing

bash

This demonstrates using curl to send an HTTP request and log detailed request/response traces with timestamps.


curl --trace-ascii d.txt --trace-time http://example.com/

external tools curlrequest tracing and debugging

bash

This demonstrates debugging HTTP requests using curl's --trace-ascii option to log detailed request and response traces.


curl --trace-ascii debugdump.txt http://www.example.com/

external tools curldebugging and tracing request tracing

bash

This demonstrates basic awk usage for extracting specific fields from text.


echo -e "hello world\nawk cheatsheet" | awk '{print $2}'

external tools awkfield extraction

bash

This demonstrates using the tee command to write output to both stdout and a file simultaneously.


echo "Log this" | tee logfile.txt

external tools teeoutput redirection

bash

This script finds all .txt files in the current directory and its subdirectories and deletes them.


find . -name "*.txt" -exec rm {} \;

external tools find

bash

This script demonstrates parallel execution by using xargs to run the sleep command in parallel for numbers 1 through 10, with up to 4 processes running simultaneously.


echo {1..10} | xargs -n 1 -P 4 sleep

external tools xargsparallel task execution

bash

This demonstrates extracting the second word from a string using awk.


echo "hello world" | awk '{print $2}'

external tools awkbasic field extraction

bash

This demonstrates listing and sorting directory contents in a user-friendly format using ls.


ls -lh --sort=time

external tools lssorting and formatting options

bash

This demonstrates comparing the output of two commands using diff and process substitution.


diff <(echo -e "12\n456") <(echo -e "123\n456")

external tools diffprocess substitution

bash

This demonstrates downloading multiple files from a website using curl with a range pattern.


curl "http://somewebsite.com/files[0001-0010].txt" -o "file_#1.txt"

external tools curlfile downloading range pattern

bash

This demonstrates profiling HTTP request timings using curl by measuring connection time, time to first byte, and total time for a request.


curl -w "Connect time: %{time_connect} Time to first byte: %{time_starttransfer} Total: %{time_total} \n" "http://example.com/1/endpoint" -s -o /dev/null

external tools curlHTTP request timing profiling

bash

This demonstrates calculating the logarithm of 100 with base 10 using the bc command.


echo 'l(100)/l(10)' | bc -l

external tools bcmathematical computation

bash

This demonstrates pattern matching and substitution using sed with a custom delimiter.


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|the \(.*\) dog|something else|p"

external tools sedpattern matching and substitution

bash


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|.*the \(.*\) dog.*|What is the dog? \1|p"

external tools sed

bash

This demonstrates pattern matching and extraction using sed in Bash.


echo "The quick brown fox jumps over the lazy dog." | sed -n "s|.*\(the .* dog\).*|\1|p"

external tools sedpattern matching and extraction

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