I was trying to install sage-4.8 from source in ubuntu 10.04. I had 
downloaded the sage-4.8.tar archive, created the sage-4.8 directory and 
then used the command "make". After nearly two hours, I got the report 
(only relevant part is shown below):

*************************************************
Traceback (most recent call last):
  File "setup.py", line 830, in <module>
    execute_list_of_commands(queue)
  File "setup.py", line 287, in execute_list_of_commands
    execute_list_of_commands_in_parallel(command_list, nthreads)
  File "setup.py", line 238, in execute_list_of_commands_in_parallel
    p = Pool(nthreads)
  File 
"/home/myname/sage-4.8/local/lib/python/multiprocessing/__init__.py", line 
227, in Pool
    return Pool(processes, initializer, initargs)
  File "/home/myname/sage-4.8/local/lib/python/multiprocessing/pool.py", 
line 84, in __init__
    self._setup_queues()
  File "/home/myname/sage-4.8/local/lib/python/multiprocessing/pool.py", 
line 131, in _setup_queues
    self._inqueue = SimpleQueue()
  File "/home/myname/sage-4.8/local/lib/python/multiprocessing/queues.py", 
line 328, in __init__
    self._rlock = Lock()
  File 
"/home/myname/sage-4.8/local/lib/python/multiprocessing/synchronize.py", 
line 117, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File 
"/home/myname/sage-4.8/local/lib/python/multiprocessing/synchronize.py", 
line 49, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)

"OSError: [Errno 30] Read-only file system
sage: There was an error installing modified sage library code.
ERROR installing Sage
make[1]: *** [installed/sage-4.8] Error 1
make[1]: Leaving directory `/home/myname/sage-4.8/spkg'

real    126m42.538s
user    121m51.361s
sys    12m44.712s
Error building Sage.
make: *** [build] Error 1"
*********************************************************
My guess is that I should have used "sudo make" command instead of just 
"make". The result of uname -a is: Linux myname-desktop 2.6.32-39-generic 
#86-Ubuntu SMP Mon Feb 13 21:47:32 UTC 2012 i686 GNU/Linux

Please suggest what I should do now. Will it be proper to use the "sudo 
make" command at this stage or should I do something about the already 
created sage-files and directories (in the failed installation process)?

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