admin@i-0516981624af637bf:~$ telnet -r                                          

      unattended-upgrades                                                       alternatives.log.1  btmp           cloud-init.log         debug.1     journal         user.log                                                                  apt                 btmp.1         daemon.log             debug.2.gz  kern.log        user.log.1                                                                auth.log            cast           daemon.log.1           dpkg.log    kern.log.11     user.log.2.gz                                                             auth.log.1          chrony         daemon.log.2.gz        dpkg.log.1  kern.log.22.gz  wtmp                                                                      admin@i-06683be665f75c9a6:/var/log$ cd ./cast/                                  admin@i-06683be665f75c9a6:/var/log/cast$ ls                                     i-06683be665f75c9a6                                                             admin@i-06683be665f75c9a6:/var/log/cast$ ls- la                                 bash: ls-: command not found                                                    admin@i-06683be665f75c9a6:/var/log/cast$                                        

    #1) Respect the privacy of others.                                              #2) Think before you type.                                                      #3) With great power comes great responsibility.                                                                                                            [sudo] password for admin:                                                      sudo: a password is required                                                    admin@i-0883f8551b33b395b:~$ ^C                                                 admin@i-0883f8551b33b395b:~$ ^C                                                 admin@i-0883f8551b33b395b:~$ sudo                                               usage: sudo -h | -K | -k | -V                                                   usage: sudo -v [-AknS] [-g group] [-h host] [-p prompt] [-u user]               usage: sudo -l [-AknS] [-g group] [-h host] [-p prompt] [-U user] [-u user] [comusage: sudo [-AbEHknPS] [-r role] [-t type] [-C num] [-D directory] [-g group] [usage: sudo -e [-AknS] [-r role] [-t type] [-C num] [-D directory] [-g group] [-admin@i-0883f8551b33b395b:~$                                                    

admin@i-0d5aa000864525c9c:/home$ sudo qwe                                                                                                                       We trust you have received the usual lecture from the local System              Administrator. It usually boils down to these three things:                                                                                                         #1) Respect the privacy of others.                                              #2) Think before you type.                                                      #3) With great power comes great responsibility.                                                                                                            [sudo] password for admin:                                                                                                                                      ^Csudo: 1 incorrect password attempt                                            admin@i-0d5aa000864525c9c:/home$ ^C                                             admin@i-0d5aa000864525c9c:/home$ ^C                                             admin@i-0d5aa000864525c9c:/home$