To bring up an X Desktop from a network computer:
/usr/X11R6/bin/Xquartz :1 -query host_name -once
NOTE: If you are using Ubuntu Karmic (9.10) then you may want to look HERE.
When accessing an X Desktop from MACOSX there can be a problem with the key mapping so to get things right, bring up an xterm console and run:
$ xmodmap path/to/mykeymap
where the file 'mykeymap' stores the key mappings:
clear shift
clear lock
clear control
clear mod1
clear mod2
clear mod3
clear mod4
clear mod5
keycode 8 = a A aring Aring
keycode 9 = s S ssharp Iacute
keycode 10 = d D partialderivative Icircumflex
keycode 11 = f F function Idiaeresis
keycode 12 = h H abovedot Oacute
keycode 13 = g G copyright doubleacute
keycode 14 = z Z Greek_OMEGA cedilla
keycode 15 = x X approxeq ogonek
keycode 16 = c C ccedilla Ccedilla
keycode 17 = v V radical U25CA
keycode 18 = section plusminus
keycode 19 = b B integral idotless
keycode 20 = q Q oe OE
keycode 21 = w W U2211 doublelowquotemark
keycode 22 = e E dead_acute acute
keycode 23 = r R registered U2030
keycode 24 = y Y yen Aacute
keycode 25 = t T dagger caron
keycode 26 = 1 exclam exclamdown U2044
keycode 27 = 2 at trademark EuroSign
keycode 28 = 3 numbersign sterling U2039
keycode 29 = 4 dollar cent U203A
keycode 30 = 6 asciicircum section UFB02
keycode 31 = 5 percent infinity UFB01
keycode 32 = equal plus notequal plusminus
keycode 33 = 9 parenleft ordfeminine periodcentered
keycode 34 = 7 ampersand paragraph doubledagger
keycode 35 = minus underscore endash emdash
keycode 36 = 8 asterisk enfilledcircbullet degree
keycode 37 = 0 parenright masculine singlelowquotemark
keycode 38 = bracketright braceright leftsinglequotemark rightsinglequotemark
keycode 39 = o O oslash Oslash
keycode 40 = u U dead_diaeresis diaeresis
keycode 41 = bracketleft braceleft leftdoublequotemark rightdoublequotemark
keycode 42 = i I dead_circumflex U02C6
keycode 43 = p P Greek_pi U220F
keycode 44 = Return
keycode 45 = l L notsign Ograve
keycode 46 = j J U2206 Ocircumflex
keycode 47 = apostrophe quotedbl ae AE
keycode 48 = k K U02DA UF8FF
keycode 49 = semicolon colon ellipsis Uacute
keycode 50 = backslash bar guillemotleft guillemotright
keycode 51 = comma less lessthanequal macron
keycode 52 = slash question division questiondown
keycode 53 = n N dead_tilde U02DC
keycode 54 = m M mu Acircumflex
keycode 55 = period greater greaterthanequal breve
keycode 56 = Tab
keycode 57 = space NoSymbol nobreakspace
keycode 58 = grave asciitilde dead_grave grave
keycode 59 = BackSpace
keycode 60 = 0x1000003
keycode 61 = Escape
keycode 62 =
keycode 63 = Meta_L
keycode 64 = Shift_L
keycode 65 = Caps_Lock
keycode 66 = Mode_switch
keycode 67 = Control_L
keycode 68 = Shift_R
keycode 69 = Mode_switch
keycode 70 = Control_R
keycode 71 = Meta_R
keycode 72 =
keycode 73 = KP_Decimal
keycode 74 = Right asterisk
keycode 75 = KP_Multiply
keycode 76 =
keycode 77 = KP_Add
keycode 78 = Left plus
keycode 79 = Escape
keycode 80 = Down equal
keycode 81 =
keycode 82 =
keycode 83 = KP_Divide
keycode 84 = KP_Enter
keycode 85 = Up slash
keycode 86 = KP_Subtract
keycode 87 =
keycode 88 =
keycode 89 = KP_Equal
keycode 90 = KP_0
keycode 91 = KP_1
keycode 92 = KP_2
keycode 93 = KP_3
keycode 94 = KP_4
keycode 95 = KP_5
keycode 96 = KP_6
keycode 97 = KP_7
keycode 98 =
keycode 99 = KP_8
keycode 100 = KP_9
keycode 101 =
keycode 102 =
keycode 103 =
keycode 104 = F5
keycode 105 = F6
keycode 106 = F7
keycode 107 = F3
keycode 108 = F8
keycode 109 = F9
keycode 110 =
keycode 111 = F11
keycode 112 =
keycode 113 = F13
keycode 114 =
keycode 115 = F14
keycode 116 =
keycode 117 = F10
keycode 118 =
keycode 119 = F12
keycode 120 =
keycode 121 = F15
keycode 122 = Help
keycode 123 = Home
keycode 124 = Prior
keycode 125 = Delete
keycode 126 = F4
keycode 127 = End
keycode 128 = F2
keycode 129 = Next
keycode 130 = F1
keycode 131 = Left
keycode 132 = Right
keycode 133 = Down
keycode 134 = Up
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add shift = Shift_L Shift_R
add lock = Caps_Lock
add control = Control_L Control_R
add mod1 = Alt_L
add mod2 = Num_Lock
add mod3 = Mode_switch
add mod4 = Meta_L
add mod5 = Scroll_Lock
