$ openssl x509 -noout -text -in (crtファイル)
$ uname -a Linux tiger.local 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.5 (Tikanga)
dd if=/dev/zero of=dummy bs=1M count=1