If you see errors like the following while installing Ruby and Rails
custom_require.rb:21:in `require__': No such file to load -- zlib (LoadError)
See the following links as I found them helpful.
This is worth repeating if someone needs this tip and finds it earlier than I did.
When building on some versions of Linux, Emacs will seg fault during the build. It is mentioned in the etc/PROBLEMS but was unclear. Eric Raymond posted a cleaned up PROBLEMS file that makes it more clear. (His post is here ).
In short I entered the following and Emacs built fine.
setarch i386 ./configure
setarch i386 make
If you have put scripts using scp that timeout due to a slow connection or if you are tunneling out through a proxy. Ty the following flags passed into scp.
-o ServerAliveCountMax=1500 -o ServerAliveInterval=20
If you are working with HSQLDB v1.8 and you don’t see changes written to disk or if after you app runs you can view your data it’s because HSQL since 1.7 is not closing the database after the last connection is closed.
To fix this append the following to your JDBC url.
;shutdown=true
See the following link for more details:
Continue reading →I found a great Ant tip over at
http://andrewbeacock.blogspot.com/2005/08/pretty-printing-java-classpaths-using.html
With it you can debug your classpath references quite nicely.
Continue reading →