Dictionary Traversal

• .
• ..
• ../..
• /etc/passwd

$ ls ../..

total 40
drwxr-xr-x  2 root root  4096 Apr 12  2016 backups
drwxr-xr-x  9 root root  4096 Jan 19  2018 cache
drwxr-xr-x 25 root root  4096 Jul 24  2019 lib
drwxrwsr-x  2 root staff 4096 Apr 12  2016 local
lrwxrwxrwx  1 root root     9 May  3  2016 lock -> /run/lock
drwxr-xr-x  6 root root  4096 Jan 19  2018 log
drwxrwsr-x  2 root mail  4096 May  3  2016 mail
drwxr-xr-x  2 root root  4096 May  3  2016 opt
lrwxrwxrwx  1 root root     4 May  3  2016 run -> /run
drwxr-xr-x  2 root root  4096 May  3  2016 spool
drwxrwxrwt  2 root root  4096 Apr 28 12:34 tmp
drwxr-xr-x  4 root root  4096 Jan 19  2018 www