Tag: Linux

  • TIL: Why there is /bin and /usr/bin, /lib and /usr/lib, etc on Unix systems

    If you’ve ever navigated around a Unix system you may have wondered why there are /bin and usr/bin directories or /lib and /usr/lib or /sbin and /usr/sbin – or like me, you just took it for something that probably has any meaning but isn’t relevant enough to look into. Well, today it became relevant: When…

  • TIL: Dots in /etc/sudoers.d filenames

    A tale of facepalms While reviewing some Ansible modules with a colleague we stumbled upon an issue with our user creation module, and for a briefe time couldn’t understand what was going on. The module in question creates multiple Linux users, adds them to groups, and enables some to use password less sudo via the /etc/sudoers.d config…

  • TIL: Bash select

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    I was recently researching different bash prompts and stumbled upon an StackExchange answer which explains the different prompt types (PS1, PS2, PS3, and PS4). The answer explains how the PS3 prompt is used for commands like select. I did not know about select before, so that’s the real TIL here! […] PS3 is shown when the select command is waiting for…