I poked around https://rhn.redhat.com/rhn/systems/SystemEntitlements.do for way too long, and couldn’t figure out how to purchase a renewal of our RHEL server support. I finally found https://www.redhat.com/wapps/store/catalog.html and clicked on the “buy online” link at the top. I went to the … Continue reading
Randy just asked me to add Karishma Chadha and Smaranda Sandu to the cs251stu group. There are basically two strategies: 1. edit the /etc/group entry, extract the whole group, use the migrate_group.pl script to convert it to ldif format, then … Continue reading
Upgrading Firefox on a Mac or Windows machine that isn’t shared with others is usually a piece of cake: click on the “upgrade” button that the browser gives you and follow the directions. Upgrading on a Linux workstation, particularly one … Continue reading
Randy recently asked me to add some students to the cs251stu group. There is a script that does that, addLDAPusertogroup.pl, but it (1) doesn’t add anything to the entry in /etc/group, and (2) just appends new members. In this case, the … Continue reading
Mike Dawson did the early detective work for this: A message from Larry Baldwin that we need the XMLWriter class compiled into PHP to enable a feature that he wants. Is that hard to arrange? The word “compile” scares me … Continue reading
Brian Tjaden was having some trouble with CGI scripts running on Puma and on Tempest. Since the trouble was also on Puma, we could ignore selinux as the problem. He could run simple CGI/Python scripts, but the trouble came when … Continue reading
Irwin recently experienced one of those random crashes and currently is in a bad state. One symptom: [root@tempest ~] ssh irwin Last login: Tue Dec 11 14:31:20 2012 from puma.wellesley.edu [root@irwin ~] getent passwd anderson So, somehow one of the … Continue reading
There’s a package (Python module) that interfaces a Python Script with a MySQL database back-end. It’s called MySQLdb. For example: [root@puma ~] python2.4 Python 2.4.3 (#1, Jun 18 2012, 08:55:23) >>> import MySQLdb >>> [root@puma ~] python2.6 Python 2.6.5 (r265:79063, … Continue reading
We have a mystery on the CentOS workstations. ssh works, but su does not. Here’s an example: [luser@gibbon ~] ssh anderson@gibbon anderson@gibbon’s password: Last login: Wed Sep 26 10:56:41 2012 from gibbon.wellesley.edu [anderson@gibbon ~] logout Connection to gibbon closed. [luser@gibbon … Continue reading
I just tried to ssh from Puma to Gibbon (as root) and got the following: [root@puma ~] ssh gibbon @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could … Continue reading