If I run "context" with no arguments, I get the following output (and nothing else):
mtxrun | unknown script 'context.lua' or 'mtx-context.lua'
/home/bwise/context/20110505-beta-extras/tex/texmf-context/scripts/context/lua/mtx-context.lua
26155 open("./context.lua", O_RDONLY) = -1 ENOENT (No such file or directory)26155 open("/home/bwise/context/20110505-beta-extras/tex/texmf-linux-64/bin/mtx-context.lua", O_RDONLY) = -1 ENOENT (No such file or directory)26155 stat("mtx-context.lua", 0x7fffcf962660) = -1 ENOENT (No such file or directory)26155 stat("mtx-context.lua", 0x7fffcf962660) = -1 ENOENT (No such file or directory)26155 open("/home/bwise/context/20110505-beta-extras/tex/texmf-linux-64/bin/mtx-context.lua", O_RDONLY) = -1 ENOENT (No such file or directory)26155 stat("context.lua", 0x7fffcf962660) = -1 ENOENT (No such file or directory)26155 stat("context.lua", 0x7fffcf962660) = -1 ENOENT (No such file or directory)