Challenges | iximiuz Labs

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux

Verify Downloaded Files with SHA-256 Checksums

Practice using SHA-256 checksums to verify file integrity, detect corrupted or modified files, and confirm that downloaded data matches the original.

#sha256 #checksums #linux-101

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux, Networking

Call an HTTP API with curl: Authenticating with Basic Auth and Bearer Tokens

by Ivan Velichko

Practice authenticating to an HTTP API from the command line using both a username and password and a bearer token, and learn a couple of tricks along the way.

#curl #http #authentication #linux-101

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux, Networking

Call an HTTP API with curl: Processing JSON Responses with jq

by Ivan Velichko

Practice one of the most common command-line combinations for HTTP API access: fetch a JSON response with curl and pipe it into jq to pretty print, reshape, or get only the relevant parts.

#curl #jq #json #linux-101

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux, Networking

Call an HTTP API with curl: Reading Resources

by Ivan Velichko

Learn the basics of accessing HTTP APIs from the command line: call different endpoints, read the response body, headers, and status code, follow redirects, and request an alternative representation of a server resource.

#curl #http #linux-101 #investigation

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux, Networking

DNS 101: Resolve Public, Internal, and Local Hostnames

by Ivan Velichko

Practice manually resolving public domains, internal hostnames, and locally defined names to the corresponding IP addresses so you feel confident next time a DNS issue occurs.

#dns #hosts-file #linux-101

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux, Networking

Inspect Network Interfaces, IP Addresses, and Routes on a Linux Host

by Ivan Velichko

Practice reading the network configuration of Linux hosts: find interface names, IP and MAC addresses, the default gateway, and detect which routes a server uses to reach different destinations.

#ip #routing #linux-101 #investigation

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge on Linux

Run a Glibc-incompatible Binary Using chroot

by Başar Subaşı

Export an Alpine container rootfs using crane, set up a chroot environment, and execute a musl-linked binary that fails to run on the host system.

#chroot #musl #glibc #crane #alpine

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge on Linux, Programming

Kill a Stubborn Process with SIGKILL

by Başar Subaşı

A stubborn process is running on the system, kill it :)

#signals #sigkill #golang #kill #process

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge on Kubernetes, Linux

Debug a Failing Kubernetes Job

by Omkar Shelke

A Job manifest at /home/laborant/batch-job.yaml is exiting with a non-zero exit status. The Job has limited retries configured. Inspect the cluster and the manifest to find the bug, fix it, and reapply.

#cka #ckad #jobs #batch #debugging

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge on Programming, Linux

Utilize POSIX Threads for Concurrency

by Başar Subaşı

Refactor a slow, single-threaded C file downloader that fetches files sequentially into a multi-threaded program using POSIX Threads (pthreads) to achieve concurrent downloads.

#c #pthreads #threads #concurrency #gcc