* l0f4r0@tuta.io <l0f4r0@tuta.io> [20-01/15=We 01:19 +0100]: >> ls -R /etc/sudoers.dcat /etc/sudoers >> ls -l /usr/local/bin/backlight-brightness * kaye n <guikaye@gmail.com> [20-01/15=Wed 10:57 +0800]: > [...] > kaye@laptop:~$ ls -R /etc/sudoers.dcat /etc/sudoers > [...] l0f4r0's commands were missing a newline. These were the intent: ls -R /etc/sudoers.d cat /etc/sudoers ls -l /usr/local/bin/backlight-brightness