Можно на футболки и сумки юникс команды писать, образцы внизу:
1.
user@linux:~$ uptime
12:28:15 up 20 days, 17:10, 1 user, load average: 3.00, 3.00, 3.00
2.
user@linux:~$ free
total used free shared buffers cached
Mem: 2075556 2021844 53712 0 148076 1617532
-/+ buffers/cache: 256236 1819320
Swap: 2097144 60 2097084
3.
user@linux:~$ cat /etc/shells
# /etc/shells: valid login shells
/bin/lol
/bin/rofl
/usr/bin/wtf
/usr/bin/afaik
/bin/fyi
/usr/bin/jtlun
/usr/bin/asap
/bin/imho
/usr/bin/piha
/bin/otoh
/bin/rtfm
/bin/tgif
/bin/false
/usr/bin/bbn
4.
user@linux:~$ cal
May 2008
Mo Tu We Th Fr Sa Su
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31
5.
zeus:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1A:4B:F1:A0:A7
inet addr:192.168.0.100 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21a:4bff:fef1:a0a7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9499038 errors:0 dropped:0 overruns:0 frame:0
TX packets:7566871 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2562190376 (2.3 GiB) TX bytes:171702983 (163.7 MiB)
Interrupt:169
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:138 errors:0 dropped:0 overruns:0 frame:0
TX packets:138 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22897 (22.3 KiB) TX bytes:22897 (22.3 KiB)
6.
zeus:~# ping -c 3 kiss.my.ass
PING kiss.my.ass (212.58.224.131) 56(84) bytes of data.
64 bytes from rdirwww-vip.thdo.kiss.my.ass (212.58.224.131): icmp_seq=1 ttl=120 time=30.3 ms
64 bytes from rdirwww-vip.thdo.kiss.my.ass (212.58.224.131): icmp_seq=2 ttl=120 time=27.9 ms
64 bytes from rdirwww-vip.thdo.kiss.my.ass (212.58.224.131): icmp_seq=3 ttl=120 time=27.8 ms
--- kiss.my.ass ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 27.893/28.722/30.342/1.161 ms
и так дальше. идея понятная
UNIX is an operating system, OS/2 is half an operating system, Windows is a shell, and DOS is a boot partition virus. (Peter Coffin)
, нашью на сумку от ноута 
