On 22 Mrz., 20:01, AD <adphy2...@gmail.com> wrote:
> I am sorry for asking at the wrong forum. I am going to ask this in the
> sage-support section. I request the administrator of this forum to delete
> this question. Thanks.

No, this is in principle the correct list (or discussion group),
likewise the Google group sage-release.



Try running the following Python script:

http://trac.sagemath.org/sage_trac/raw-attachment/ticket/5965/sage-check-ptys-semaphore.py

(I.e., download the file and then do 'python /path/to/sage-check-ptys-
semaphore.py'.)

In your case, most probably /dev/shm has wrong permissions; it should
look like this:

$ ls -ld /dev/shm/
drwxrwxrwt 2 root root 220 Mar 22 23:31 /dev/shm/

(This is the shared memory "device" which is also used to synchronize
threads.)



You don't have to be root to build Sage, and you shouldn't be logged
in as root when you build Sage (as for most if not all software
packages; only the install step usually requires root privileges in
case you want to install a package system-wide.)


-leif

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