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  1. Reset root password on RHEL7

    How to reset an unknown root password using rd.break on RHEL 7.

    Start by booting until the GRUB2 menu appears then edit the boot loader menu with the e key. Find the line beginning with linux and make then follow these steps.

    1. add rd.break
    2. run mount -o remount …
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  2. Using screen as a serial console

    Published: Tue 20 February 2018
    By Jon M

    In misc.

    Using screen you can connect to any serial device in /dev. A typical USB-to-RS-232 adapter will usually be /dev/ttyUSB0. A physical serial port will usually be /dev/ttyS0.

    screen /dev/ttyUSB0 9600
    
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