Challenges by Mister P | iximiuz Labs

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

Get Help: Use Shell Help Tools to Answer Questions About Commands

by Mister P

Practice using built-in shell help tools — man, whatis, type, and apropos — to locate information about commands without leaving the terminal.

#rhcsa #man-pages #shell-help #command-line

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

Persist a Custom Binary Directory in $PATH

by Mister P

A custom application has been installed to a non-standard location. Configure the laborant user's environment so the application's directory is permanently available in $PATH for all future login shells.

#bash #path #shell-environment #bash-profile #rhcsa

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

Fix a Broken $PATH So Commands Work Again

by Mister P

The laborant user's PATH has been corrupted, causing common commands to fail with "command not found". Diagnose and fix the broken PATH so that standard system commands work again.

#bash #path #shell #troubleshooting

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

Shell History: Delete Sensitive Commands and Prevent Future Logging

by Mister P

Practice managing Bash history by removing a specific sensitive command from history and configuring the shell to prevent space-prefixed commands from being saved.

#bash #shell-history #histcontrol #rhcsa

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

Audit the Shell Environment: Detect a Shadowed Command

by Mister P

A system administrator must verify the shell environment is clean before performing privileged tasks. Practice detecting and resolving command aliases and shell function overrides that can silently hijack administrative commands.

#shell #bash #environment #rhcsa #audit

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

RHCSA Prep: Quoting and Escaping Special Characters in Shell Commands

by Mister P

Master Bash quoting forms — single quotes, double quotes, backslash escaping, and ANSI-C quoting — to correctly handle filenames and arguments containing spaces, glob characters, dollar signs, and newlines.

#bash #quoting #shell #rhcsa-prep #special-characters

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

Broken Man Pages: whatis Returns Nothing Appropriate

by Mister P

The man page database on this system is broken — whatis and apropos return "nothing appropriate" for every query. Diagnose the root cause and restore full functionality of the shell help tools.

#man-pages #whatis #apropos #mandb #rhcsa

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

RHCSA Prep: The sudo Command Isn't What It Seems

by Mister P

The laborant user is reporting that something feels wrong when running administrative tasks. Commands invoked via sudo appear to succeed, but the results are unexpected — files end up in the wrong place and critical system binaries seem to behave differently than documented. Investigate the shell environment, diagnose the root cause, and fix it permanently.

#rhcsa #shell #environment #path #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 Linux

Fix the Broken $PATH: Custom Commands No Longer Found After Login

by Mister P

The laborant user's custom directory /opt/tools/bin was working fine last week. Now, after every login, the commands in that directory are not found — even though they worked in the previous session. Someone touched the shell profile and now the $PATH change doesn't survive a new login shell.

#bash #path #shell-profile #bash-profile #environment

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

RHCSA Prep: Fix the Broken Script That Processes Special-Character Filenames

by Mister P

A shell script that processes files with spaces and special characters in their names is producing "No such file or directory" errors even though the files exist. Diagnose the quoting bug and fix the script so it runs without errors.

#bash #quoting #shell-scripting #special-characters #rhcsa-prep