http://www.lamoree.com/machblog/ Lamoree Software Blog en-us Mon, 17 Jun 2013 23:30:33 -0700 Mon, 31 Jan 2011 22:22:00 -0700 MachBlog http://blogs.law.harvard.edu/tech/rss admin@lamoree.com admin@lamoree.com http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=47B6D348%2D7DC2%2D44AA%2D97315F0E8F38EFE9 I wanted a largish prime number with which I could test a hash table that uses the modulo of the prime to select a bucket. Anyway, there's a handy command line option in OpenSSL to determine which inputs are prime. So, say I wanted a prime of somet... Shell Programming Mon, 31 Jan 2011 22:22:00 -0700 entryId=47B6D348-7DC2-44AA-97315F0E8F38EFE9?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=364B9C14%2DD2F8%2D4491%2DA72AE6C5E966DE9C I saw a tip from @linuxalive about obtaining the apparent public IP address from the current machine. In a blog post last month, Racker Hacker wrote about his frustration viewing the HTML returned by the service DynDNS offers at checkip.dyndns.or... Networking Shell Programming Sun, 16 Aug 2009 15:28:00 -0700 entryId=364B9C14-D2F8-4491-A72AE6C5E966DE9C?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=8B89D529%2DF343%2D45FD%2DB50EE8E2AF6EDEE7 A few months ago I read an article on nixCraft about blocking IPs by country. It's a bit harsh block an entire country, but some machines just don't need to be accessible to the entire world. I've also had the need to quickly drop packets from an... Linux Shell Programming Sat, 25 Apr 2009 04:33:00 -0700 entryId=8B89D529-F343-45FD-B50EE8E2AF6EDEE7?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=1A0B27FF%2D8696%2D433B%2DA0CE2DB2F7C147CB Over the last week, my virtual private server needed to be restarted a couple times. Once, I was there to see the restart, and manually run the script to bring Tomcat up. However, another time I wasn't. Since I run Tomcat from a plain user account... Java Linux Shell Programming Tomcat Sat, 25 Oct 2008 01:24:00 -0700 entryId=1A0B27FF-8696-433B-A0CE2DB2F7C147CB?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=94A2F93B%2DC93B%2D4087%2DB39295B486AFCEBA In the last blog post about migrating from MSSQL to PostgreSQL, I left one detail for later -- resetting all the sequences after importing data. I created two PL/pgSQL functions to do the work of selecting the maximum value in the primary key and ... PostgreSQL Shell Programming Fri, 24 Oct 2008 14:49:00 -0700 entryId=94A2F93B-C93B-4087-B39295B486AFCEBA?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=E2CF99E7%2DE404%2D43A0%2D9B62503BD43DBA8D The following are notes on a migration from Microsoft SQL Server 2000 to PostgreSQL 8. The old database has 60 tables, some with a few million rows, and about 7 Gb of data in total. There were several issues to deal with: The order of the... PostgreSQL Shell Programming Tue, 07 Oct 2008 01:41:00 -0700 entryId=E2CF99E7-E404-43A0-9B62503BD43DBA8D?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=C5D171E7%2D8242%2D492F%2D94AAAAD5A96EB3E0 While working on servers that reference user account information from a OpenLDAP server, I encountered the need to query for the list of user accounts. This is quick and easy with a GUI LDAP tool like Apache Directory Studio. However, I needed the ... OpenLDAP Shell Programming Fri, 25 Jan 2008 12:40:00 -0700 entryId=C5D171E7-8242-492F-94AAAAD5A96EB3E0?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=50E0CC3B%2DF998%2D4B21%2D8500E1A931BE9F0E In my never-ending fight against spam and backscatter, I updated my Postfix mail queue cleaning script. It now allows performs two actions: list or delete. It also accepts multiple patterns to match against e-mail addresses. There are still a coupl... Postfix Shell Programming Sat, 27 Oct 2007 12:44:00 -0700 entryId=50E0CC3B-F998-4B21-8500E1A931BE9F0E?event=blog&showEntry= http://www.lamoree.com/machblog/index.cfm?event=showEntry&entryId=D4EF8115%2DC2A2%2D4FCA%2DA22F3D52D7A6D44B I've been working on a kickstart script that nearly completely configures a cluster node. I encountered a bit of trouble with my sed scripting that modifies /etc/mail/sendmail.mc such that the node's e-mails are properly masqueraded for delivery to... Shell Programming Sat, 21 Apr 2007 12:59:00 -0700 entryId=D4EF8115-C2A2-4FCA-A22F3D52D7A6D44B?event=blog&showEntry=