On Thursday 27 August 2015 18:09:14 Viktor Dukhovni wrote: > On Thu, Aug 27, 2015 at 05:22:16PM +0100, Gary Stainburn wrote: > > Is there a simple way for a simple admin like me to get round this > > problem? > > One more thing. Test the correctness/responsiveness of the various > random devices. First post the output of: > > $ ls -lL /dev/*random > > # This one should be fast > $ time dd if=/dev/urandom bs=32b count=1 of=/dev/null > > # This one might be *extremely* slow, you might not be willing > # to wait that long... > $ time dd if=/dev/random bs=32b count=1 of=/dev/null > > ... for any other "*random" devices. > > -- > Viktor.
[root@ollie2 ~]# ls -lL /dev/*random crw-rw-rw- 1 root root 1, 8 Aug 26 09:35 /dev/random crw-rw-rw- 1 root root 1, 9 Aug 26 09:35 /dev/urandom [root@ollie2 ~]# time dd if=/dev/urandom bs=32b count=1 of=/dev/null 1+0 records in 1+0 records out 16384 bytes (16 kB) copied, 0.00318778 s, 5.1 MB/s real 0m0.005s user 0m0.001s sys 0m0.004s [root@ollie2 ~]# time dd if=/dev/random bs=32b count=1 of=/dev/null 0+1 records in 0+1 records out 78 bytes (78 B) copied, 0.00028356 s, 275 kB/s real 0m0.002s user 0m0.000s sys 0m0.002s [root@ollie2 ~]# -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
