psPost

adam@adam_brain:~$ps -aux

 15:15:55 up  4:24,  5 users,  load average: 0.32, 0.39, 0.44
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
adam     tty7     :0               10:52    4:23m 13:57   0.10s init --user
adam     pts/12   :0:S.0           10:52    2:03   0.80s  0.80s vim psPost
adam     pts/14   :0               11:40    1:24m  0.14s  0.11s ssh feelings
adam     pts/17   :0:S.3           15:14    3.00s  0.05s  0.00s w

adam@adam_brain:~$ ssh heart
ssh: Could not resolve hostname heart: Name or service not known

adam@adam_brain:~$ ping heart
ping: unknown host heart

adam@adam_brain:~$ cat /etc/hosts
127.0.0.1       localhost
127.0.1.1       adam_brain
192.168.256.390       heart

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

adam@adam_brain:~$ ping 192.168.256.390
ping: unknown host 192.168.256.390

adam@adam_brain:~$ whoami
adam

adam@adam_brain:~$ whatis adam
adam: nothing appropriate.

adam@adam_brain:~$ whereis adam
adam: unknown

adam@adam_brain:~$ cat /etc/hostname
adam_brain
adam@adam_brain:~$ ping adam_brain
PING adam_brain (127.0.1.1) 56(84) bytes of data.
64 bytes from adam_brain (127.0.1.1): icmp_seq=1 ttl=64 time=0.034 ms
64 bytes from adam_brain (127.0.1.1): icmp_seq=2 ttl=64 time=0.039 ms
64 bytes from adam_brain (127.0.1.1): icmp_seq=3 ttl=64 time=0.043 ms
^C
--- adam_brain ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.034/0.038/0.043/0.008 ms

adam@adam_brain:~$ sed -i 's/192.168.256.390/172.0.1.1/' /etc/hosts

adam@adam_brain:~$ cat /etc/hosts
127.0.0.1       localhost
127.0.1.1       adam_brain
127.0.1.1       heart

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

adam@adam_brain:~$ ping heart
PING heart (127.0.1.1) 56(84) bytes of data.
64 bytes from heart (127.0.1.1): icmp_seq=1 ttl=64 time=0.039 ms
64 bytes from heart (127.0.1.1): icmp_seq=2 ttl=64 time=0.044 ms
^C
--- heart ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.039/0.041/0.044/0.006 ms

adam@adam_brain:~$ cvlc ff_fanfare.mp3