※ 引述《weii (迷惑失道)》之铭言：
: 1. *** inode ***
: (related) zombie, link
: 2. regular expression - to match "word_word"
: special symbols
/\(\<.*\)_\1/
: 3. how many hosts are in IP/17
32766
: 4. buffer overflow
: (hint) chroot
: 5. shell script - to wait bg process (waitpid?)
wait <PID>
: to get pid of current shell
$$
: to findout what occupys resources
: to be spider problems around the world
: 6. perl or python
: 7. apache - virtual host
httpd.conf named.<domain>
: 8. stat(?)
man stat
: 9. hub v.s. switch
: 10. performace of harddisk
: 11. throughput of network - ping, tcpdump, ifconfig
: 12. ssh -> remote control, automation