frost@orchard$ echo "System going down for maintenance in twenty minutes" | sudo wall
Segmentation fault
frost@orchard$ echo "wall on orchard is borken; please fix" | write root@mailserver
Message from frost@orchard ...
wall on orchard is borken; please fix
EOF
root@mailserver# echo borken | ispell
borken
root@mailserver# pine
frost@orchard$ uname
Darwin
root@mailserver# echo "Good fences make good neighbours" | write frost@orchard
Message from root@mailserver ...
Good fences make good neighbours
EOF
frost@orchard$ cowsay "But why?" | write root@mailserver
Message from frost@orchard ... __________
< But why? >
----------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
EOF
root@mailserver# ssh nb@orchard
nb@orchard$ wall
Segmentation fault
nb@orchard$ nm `which wall`
nm: ELF header: not found
nb@orchard$ echo "there is no ELF header" | write frost
nb@orchard$ echo "good fences make good neighbours" | write frost