usage: knock [options] <host> <port[:proto]> [port[:proto]] ...                 options:                                                                          -u, --udp            make all ports hits use UDP (default is TCP)               -d, --delay <t>      wait <t> milliseconds between port hits                    -v, --verbose        be verbose                                                 -V, --version        display version                                            -h, --help           this help                                                                                                                                example:  knock myserver.example.com 123:tcp 456:udp 789:tcp                                                                                                    admin@i-061b09841336bd6c6:~$ knock localhost 5000                               admin@i-061b09841336bd6c6:~$ curl localhost                                     curl: (7) Failed to connect to localhost port 80: Connection refused            admin@i-061b09841336bd6c6:~$ nano enum.sh                                       admin@i-061b09841336bd6c6:~$ chmod +x enum.sh nd                                

admin@i-01191606e4ecb5011:/proc/573$ cd fd                                      bash: cd: fd: Permission denied                                                 admin@i-01191606e4ecb5011:/proc/573$ ls                                         ls: cannot read symbolic link 'cwd': Permission denied                          ls: cannot read symbolic link 'root': Permission denied                         ls: cannot read symbolic link 'exe': Permission denied                          arch_status  clear_refs          cpuset   fdinfo    map_files  mountstats  oom_sattr         cmdline             cwd      gid_map   maps       net         oom_sautogroup    comm                environ  io        mem        ns          pagemauxv         coredump_filter     exe      limits    mountinfo  numa_maps   patchcgroup       cpu_resctrl_groups  fd       loginuid  mounts     oom_adj     persoadmin@i-01191606e4ecb5011:/proc/573$ cd ~                                       admin@i-01191606e4ecb5011:~$                                                    admin@i-01191606e4ecb5011:~$                                                    admin@i-01191606e4ecb5011:~$ curl localhost:5                                   

/i-0868231192de13005 -q -i 2 /var/log/cast/i-0868231192de13005                      709 pts/0    S<+    0:00          \_ /usr/bin/python3 /usr/bin/asciinema recihei/i-0868231192de13005 -q -i 2 /var/log/cast/i-0868231192de13005                  717 pts/1    S<+    0:00                  \_ grep kihei                     admin@i-0868231192de13005:~$ ps aux | grep kihei                                admin        706  0.4  4.1  98188 19224 pts/0    S<l+ 18:05   0:00 /usr/bin/pythusr/bin/asciinema rec -t kihei/i-0868231192de13005 -q -i 2 /var/log/cast/i-08682de13005                                                                         admin        709  0.0  3.0  24456 14440 pts/0    S<+  18:05   0:00 /usr/bin/pythusr/bin/asciinema rec -t kihei/i-0868231192de13005 -q -i 2 /var/log/cast/i-08682de13005                                                                         admin        719  0.0  0.1   5264   636 pts/1    S<+  18:05   0:00 grep kihei   admin@i-0868231192de13005:~$ ls                                                 agent  data  datafile  kihei                                                    admin@i-0868231192de13005:~$ df -                                               

Try poking around what's in a file by using the 'head' command:                                                                                                   head -n 20 people                                                                                                                                             This will show you the first 20 lines of the 'people' file.                     admin@i-008b5638d38d1dbb9:~/clmystery$ cat hint                                 cat: hint: No such file or directory                                            admin@i-008b5638d38d1dbb9:~/clmystery$ cat hint1                                Try poking around what's in a file by using the 'head' command:                                                                                                   head -n 20 people                                                                                                                                             This will show you the first 20 lines of the 'people' file.                     admin@i-008b5638d38d1dbb9:~/clmystery$ cd                                       admin@i-008b5638d38d1dbb9:~$